ACRONYM	DEFINITION
[A]
AAFE    Aeroassist Flight Experiment
ABCL    As Built Configuration List
ABHRS	As Built Hardware Reporting System
AC	Alternating Current
AC	Comptroller Office
ACES	Acoustic Containerless Experiment System
ACIP	Assembly Configuration and Integration Panel
ACR	Active Cavity Radiometer
ACRIM	Active Cavity Radiometer Irradiance Monitor
ACRBC	Acceptance, Checkout, Retest, and Backout Criteria
ACRC	Assured Crew Return Capability - Now ACRV
ACRV	Assured Crew Return Vehicle
ACTS	(TOS) Advanced Communications Technology Satellite
AD	Aperture Door
ADC	Affiliated Data Center
ADEOS	Advanced Earth Observing Mission
ADP	Acceptance Data Package
ADP	Automated Data Processing
ADPS	Acceptance Data Package System
ADSF	Advanced Directional Solidification Furnace
AEG	AEG Telefunken
AEPI	Atmospheric Emissions Photo Imaging
AES	Atmospheric Exchange System
AESE	Airborne Electrical Support Equipment
AFB	Air Force Base
AFD	Aft Flight Deck
AFE	American Flight Echocardiograph
AFP	Air Force Program
AFR	Air Force Regulation
AFSCF	Air Force Satellite Control Facility
AFTE	Autogenic Feedback Training Experiment
AFTA	Aft Frame Tilt Actuator
AGOSS	Automated Ground Operations Scheduling System
AHU	Air Handling Unit
AI	Artificial Intelligence
AIRS	Atmospheric Infrared Sounder
AIT	Aeritalia
A/L	Air Lock
ALAE	Atmospheric Lyman Alpha Experiment
ALC	Augmented Landing Site
ALERT	Acute Launch Emergency Reliability Tip
ALRUTS	Automated Line Replaceable Unit Tracking System
ALS	Advanced Launch System
ALT	Altimeter
AMF	Astronaut Memorial Foundation
AMSU	Advanced Microwave Sounding Unit
ANSI	American National Standard Institute
AO	Assembly Order
AOA	Abort Once Around
APC	Adaptive Payload Carrier
APCS	Automated Project Control System - ARTEMIS
APID	Applications Process Identification
APS	Acquisition Processor Subsystem
ARC	Ames Research Center
ARC	Aggregation of Red Cells
ARS	Archive and Retrieval Subsystem (PPCU)
ARTEMIS	Project Management Software System - Metier Product
ARTS	Automated Resource Tracking System - ARTEMIS
ASCII	American Standard Code for Information Interchange
ASE	Airborne Support Equipment
ASP	Attitude Sensor Package
ASRS	Automated Support Requirements System
ASSY	Assembly
AST	Astro Star Tracker
ASTER	Advanced Spaceborne Thermal Emission and Reflection Radiometer
ASTG	Aerospace Test Group
ATC	Absolute Time Command
ATCS	Active Thermal Control System
ATE	Automated Test Equipment
ATLAS	Atmospheric Laboratory for Applications and Science
ATMOS	Atmospheric Trace Molecule Spectroscopy
ATP	Accelerated Training Program
ATP	Acceptace Test Procedure
AWAD	Assembly Work Authorization Document
[B]
B	Bit
BLOW	Booster-Lift-Off Weight
B&P	Budgetary and Planning
B&W	Black and White
B-1 DIV	B-1 Division (Rockwell)
B/A	Bank Angle
B/A	Barometric Altimeter
B/A	Buffer Amplifier
B/C	Bench Check
B/L	Baseline
B/O	Booster Orbiter
B/O	Breakout
B/O	Burnout
B/SC	Brake Skid Control
B/SMPL	Bits per Sample
B/U	Backup
B/V	Bleed Valve
B/W	Black and White
B/sec	Bits per Second
BA	Bank Angle
BA	Breathing Air
BAC	Boeing Aircraft Company
BAC	Booster Assembly Contractor
BAC	Buffer Access Card
BACS	Body Axis Coordinate System
BAI	Barometric Altitude Indicator
BAIR	Breathing Air
BAL	Balance
BAN	Budget Allocation Notice
BARB	Ballast Aerating Retrieval Boom
BARO	Barometer
BARS	Baseline Accounting and Reporting System
BASD	Ball Aerospace Systems Division
BASS	Backup Avionics System Software
BATT	Battery
BB	Breadboard
BBC	Before Business Clearance
BC	Battery  Charger
BC	Binary   Counter
BC	Bus Coupler
BCCT	Break Control Command Transducers
BCD	Binary Coded Decimal
BCE	Backup Control Electronics
BCE	Bus Control Element
BCFS	Backup Flight Control System
BCH	Binary Coded Hexadecimal
BCH	Bose-Chaudhuri-Hocquenghen (Computer Code)
BCN	Beacon
BCP	Base Condemnation Percent
BCP	Benchmark Control Point
BCR	Bar Chart Report
BCRD	Basic Consolidated Requirements Document
BCRT	Binary Code Range Time
BCT	Bus Configuration Table
BCU	Bus Control Unit
BCWP	Budget Costs for Work Performed
BCWS	Budget Costs for Work Scheduled
BD	Band
BD	Binary   Decoder
BD	Binary Digit
BD	Binary  Discrete
BD	Board
BDA	Backup Drive Amplifier
BDA	Bermuda   Island
BDA	Bermuda (STDN)
BDA	Blast Danger Area
BDA	Backup drive amplifier
BDC	Bi-Directional Converter
BDC	Bit  Error  Rate
BDCF	Baseline Data Collection Facility
BDCR	Baseline Document Change Request
BDD	Baseline Definition Document
BDT	Block Data Transfer
BDY	Body
BDYFLP	Body Flap
BECO	Booster Engine Cutoff
BER	Bit  Error  Rate
BFC	Backup flight control
BFCS	Backup flight control system
BFS	Backup flight system
BITE	Built-in test equipment
BLK	Block
BLR	Boiler
BLS	Bottom Left Side
BLV	Bleed Valve
BLWR	Blower
BM	Basal Metabolism
BM	Business (Branch) Manager
BM	Body Mounted
BMA	Body-Mounted Accelerometer
BMAG	Body-Mounted Attitude Gyro
BMAP	Buffer Map
BMB	Base Maintenance Building
BME	Bench Maintenance Equipment
BMFT	German D-1 Spacelab Payload
BMMD	Body Mass Measuring Device
BMS	Background Measurement Satellite
BMU	Bus Monitor Unit
BN	Ballistic Number
BO	Breakout Box
BOB	Best on Best
BOD	Beneficial occupancy Date
BOE	Break of Entry
BOF	Beginning of File
BOI	Break of Integrity
BOM	Beginning of Month
BOM	Bill of Materials
BOP	Baseline Operations Plan
BOPACE	Boeing Plastic Analysis Capability for Engines
BOS	Backup Operating System
BOS	Bright Object Sensor
BOT	Beginning of Tape
BOT	BOTSWANA (STDN)
BOW	Bill of Work
BP	C-BD           C-Band
BP	C/SCSC         Cost/Schedule Control Systems Criteria
BP	C/D            Countdown
BP	C&T            Communication and Tracking
BP	C&TSS          Communication and Tracking Subsystem
BP	Barber Pole
BP	Blood  Pressure
BP	Bandpass
BP	C/S            Counts per Second
BP	C/W            Carrier Wave
BP	C/P            Cold Plate
BP	Checkout
BP	C/0            Changeout
BP	Closed  Loop
BP	C/L            Checklist
BP	C/F            Center Frequency
BP	C/R            Commutation Rate
BP	C/C            Combustion Chamber
BP	C-to-C         Computer-to-Computer
BP	C-C            Carbon-Carbon
BP	C-Band         3900 to 6200 MHz
BP	Caution and Warning
BP	C&W            Caution and Warning
BP	Contamination/Overpressure
BP	CA             California
BP	C&M            Control and Monitoring
BP	C&DS           Command and Data Simulator
BP	C&DH           Command and Data Handling
BP	C&D            Control and Display
BP	One Hundred
BP	Cycle
BP	Constant
BP	Complete
BP	Coeff icient
BP	Centigrade
BP	Celsius
BP	Capacitance
BP	Back Pressure
BP	Cutoff
BP	Boilerplate
BP	c
BP	c              Candle
BPD	Baseline Program Documentation
BPI	Bits per Inch
BPM	Beats per Minute
BPMS	Blood Pressure Measuring System
BPR	Bypass Ratio
BPS	Bits Per Second
BPT	Body Point
BPV	Bipropellant Valve
BR	Bit Rate
BRAVO	Business Risk and Value of Operation in Space
BRCS	Basic Reference Coordinate System
BRG	Bearing
BRK	Brake
BRKT	Bracket
BRM	Biological Research Module
BRPM	Breath Rate per Minute
BRRS	Banana River Repeater Station
BRS	Bottom Right Side
BRT	Bright
BS	Block Specification
BSC	Brake Skid Controller
BSDP	Booster Stage Discharge Pressure
BSE	Booster Systems Engineer
BSI	Basic Shipping Instructions
BSI	"Boeing Services International, Inc."
BSM	Booster Separation Motors
BSM	Booster separation motor
BSR	Basic System Release
BSR	Bite Status Register
BSRM	Booster Solid Rocket Motor
BSS	Backup System Services
BSTR	Booster
BT	Burn Time (Engine)
BTC	Bus Tie Contractor
BTC	Binary Time Code
BTMS	Body Temperature Measuring System
BTR	Burn Time Remaining
BTR	Boom Time Remai-ni'ng
BTR	Bus Transfer
BTU	Bus Terminal Unit
BU	Backup
BUC	Backup Computer
BUC	"Buckhorn, CA (GSTDN)"
BUFF	Buffer
BUOU	Backup Optical Unit
BUR	Backup Rate
BW	Bridgewire
BW	Bandwidth
BX	Box
BY	Budget Year
BYP	Bypass
Btu	British Thermal Unit
[C]
C   ofF	Cost of Facilities
C   ofF	Construction of Facilities
C&T	Communications and tracking
C/W	Caution and warning
CA	Carrier Aircraft
CA	Contingency Abort
CA	Cone Angle
CA	Contract Award
CA	Corrective  Action
CA	Cost Account
CAB	Cabin
CAB	Cabinet
CAB	Civil Aeronautics Board
CAB	Cost  Audit  Board
CACB	Center Aisle Connector Bracket
CACC	Communications and Configuration Console
CACON	Cargo Container
CAD	Computer Aided Design
CADE	Controller/Attitude-Direct Electronics
CADS	Command and Data Simulator
CADSI	Communications and Data Systems Integration
CADU	Control and Display Unit
CAL	"Calibrate, Calibration"
CAL	Cornell Aeronautical Laboratory
CALC	Calculate
CAM	Computer Aided Manufacturing
CAM	Content Addressable Memory
CAM	Carrier Aircraft Modification
CAM	Computer Annunciation Matrix
CAM    R	Camera
CAN	Certification Analysis Network
CAP	Contractor Acquired Property
CAP	Crew Activity Plan
CAP	CCMS Application Programs
CAP	"Capacitor, Capacity"
CAP	Cost Account Package
CAP	Computer Application Program
CAPCOM	Capsule Communicator
CAPRI	Captive Reset ignitor
CAPS	Common Attitude Pointing System
CAPS	Crew altitude protection system
CAPSIM	Captive Simulation
CAR	Certification Approval Request
CAR	Configuration and Acceptance Review
CAR	Corrective Action Request
CARID	Customer Acceptance Review Item Disposition
CARR	Customer Acceptance Readiness Review
CAS	Calibrated Airspeed
CAS	Command Augmentation System
CAS	Control Augmentation System
CASO	Cancellation Addendum Sales Order
CASP	CDS APPlication SL'pport Programs
CASS	CITE Augmentation Support System
CATEG	Category
CAU	Customer Acquisition Unit
CAU	Command Acquisition Unit
CAU	Command Activation Unit
CAUT	Caution
CB	Center of Buoyancy
CB	Circuit Breaker
CB	Constant Bandwidth
CB/ac	Circuit Breaker (ac only)
CB/dc	Circuit Breaker (dc only)
CBA	C-Band Transponder Antenna
CBC	Complete Blood Count
CBE	"Connector Bracket, Experiment"
CBIL	Common and Bulk Items List
CBP	Connector Bracket Power
CBS	Connector Bracket Signal
CBSA	Cargo Bay Stowage Assembly
CBV	Cabin Bleed Valve
CBW	Constant Bandwidth
CBX	C-Band Transponder
CBrF3	Bromotrifluoromethane (Fire-Extinguishing Material)
cal	Calories
cc	Channel Controller
cc	Crew(s) Certified
cc	Crew Compartment
cc	Chief Counsel (KSC Directorate)
cc	Cost Center
cc	Communications Control
cc	Carbon-Carbon
ccc	Complex Control Center
ccc	Central Computer Complex
ccc	Communication(s) Control Console
ccc	Controller Checkout Console
ccc	Contaminant Control  Cartridge
CCA	Communications Carrier Assembly
CCA	Contract Change  Authorization
CCA	Coolant Control Assembly
CCA	Contract Change  Authorization
CCA	Communications carrier assembly
CCAFS	Cape Canaveral Air Force Station
CCAFS	Cape Canaveral Air Force Station
CCATS	"Command, Communication, and Telemetry System"
CCB	Configuration Change Board
CCB	Change Control Board
CCB	Configuration Control Board
CCBD	Configuration Control Board Directive
CCD	Charge Coupled Device
CCD	Checkout Command Decoder
CCD	Constants Change Display
CCDR	Contractor Critical Design Review
CCE	Computer Command Engineer
CCF	Converter Compressor Facility
CCFF	Cape Canaveral Forecast Facility
CCIR	International Radio Consultative Committee
CCL	Closed Circuit Loop
CCL	Commonality Candidate List
CCL	Configuration Control Logic
ccm	Crew/Cargo Module
ccm	Controlled Carrier Modulation
ccms	Command Control and Monitor System
ccms	"Checkout, Control, and Monitor Subsystem (LPS)"
CCM  E	Contract Change Mass  Estimate
CCMS	"Checkout, control and monitor system"
CCN	Contract Change Notice
CCN	Contract Change Negotiation
CCOH	"Corrosive Contaminants, Oxygen, and Humidity"
CCP	Center Console Panel
CCP	Configuration Control Phase
CCP	Commercial Change Proposal
CCP	Cost Control Program
CCP	Charge Capacitance Probe
CCP	Contract Change Proposal
CCP	Configuration Control Panel
CCP	Configuration Change Point
CCP	ComPuter Control Panel
CCR	Contractor Change Request
CCR	Control Center Rack
CCRA	Cape Canaveral Reference Atmosphere
CCRF	Consolidated Communication Recording Facility
CCS	Command and Control Subsystem
CCS	Contamination Control System
CCS	Console Communication System
CCS	Computer Core Segment
CCS	Complex Control Set
CCS	Command and Communication System
CCS	Central Control Station
CCS	Central Control Section
CCT	Computer Compatible Tape
CCTV	Closed Circuit Television
CCTV	Closed-circuit television
CCU	Central Control Unit
CCU	Crewman Communications Umbilical
CCU	Camera Control Unit
CCU	Crew communications unit
CCU	Communications carrier umbilical
CCV	Chamber coolant valve
CCW	Counterclockwise
CCVA	Chamber Coolant Valve Actuator
CCiM	Command Computer Input Multiplexer
CD	Command Decoder MDM
CD	Coefficient of Drag
CD	Candella (Luminous Intensity)
CD	Center Director (KSC Directorate)
CDA	Critical Design Audit
CDA	Command and Data Acquisition
CDB	Command Data Base
CDB	Central Data Buffer
CDBFR	Common Data Buffer
CDC	Confined Detonating Cord
CDC	Countdown Clock
CDDT	Countdown Demonstration Test
CDF	Cable  Distribution  Frame
CDF	Central Data Facility
CDF	Circuit Design Fabrication
CDF	Confined  Detonating  Fuse
CDF	Cool-Down Facility
CDF	Confined detonating fuse
CDF&TDS	"Circuit Design, Fabrication, and Test Data Systems"
CDH	Constant  Delta  Height
CDI	Course Deviation Indicator
CDI	Course deviation indicator
CDM	Communications/Data Manager
CDMS	Command and Data Management Subsystem
CDMS	Command and data management system
CDN	CDR   Discrepancy   Notice
CDNR	CDR Discrepancy Notice Record
CDP	Command   Data   Processor
CDPIS	Command Data Processing and Instrumentation System
CDQR	Critical Design and Qualification Review
CDR	Commander
CDR	Critical Design  Review
CDR	"Cleaning, Decontamination Request"
CDRL	Contract Data Requirements List
CDRR	Contract Documentation Requirements Records
CDS	Central Data Subsystems (LPS)
CDS	Central Data System
CDS	Closeout  Door   System
CDS	Collision Detector  System
CDS	Control  Data  Corporation
CDS	Control Data System
CDS	Central data subsystem
CDSC	Communications Distribution and Switching Center
CDT	Configuration  Data  Table
CDT	Compressed  Data   Tape
CDT	Command Descriptor Table
CDT	Central  Daylight  Time
CDT	Countdown Time
CDU	CRT Display Unit
CDU	Coupling Data Unit
CDU	Coupling  Display  Unit
CDU	Computer  Display  Unit
CDU	Control and  Display  Unit
CDW	Command Data Word
CDW	Computer  Data   Word
CE	Cost Element
CE	Control Element
CE	Civil Engineering
CE	Change Evaluation
CE	Current Expendable
CEA	Control Electronics Assembly (for MMU)
CEC	Control Encoder Coupler
CECP	Compatibility Engineering Change Proposal
CEDC	Cyclic Error Detection Code
CEI	Contract End Item
CEI	Configuration End item
CEIAC	Coastal Engineering Information Analysis Center
CEIT	Crew Equipment Interface Test
CEIT	Crew Equipment Integration Test
CEIT	Crew equipment interface test
CEQ	Council on Environmental Quality
CER	Cost Estimating Relationship
CERT	Certification
CES	Crew Escape System
CES	Control Electronics System
CF	Centrifugal Force
CF	Center Forward
CF	Carrier Frequency
CFD	"Converter, Frequency to dc Voltage"
CFE	Contractor Furnished Equipment
CFES	Continuous Flow Electrophoresis System
CFI	Card Format Identifier
CFM	Customer Furnished Material
CFM	Cubic Feet per Minute
CFMF	Crip Flow Management Facility
CFP	Conceptual Flight Profile
CFR	Code Federal Regulation
CFRP	"Carbon Fiber Reinfr-,rced Plastics"
CFSTI	Clearinghouse for Scientific and Technical informatio
CFT	Common Facilities Test
CFY	Company Fiscal Year
CG	Center of Gravity
CGAU	Cabin Gas Analysis Unit
CGC	Command Guidance Computer
CGP	Central Grounding Point
CGSS	Cryogenic Gas Storage Subsystem
CH	Channel
CH 4	Methane
CHAN	Channel
CHAR	Character
CHCS	Cabin Humidity Control Subsystem
CHG	Change
CHG	Charge
CHGR	Charger
CHL	Certified Hardware List
CHL	Channel
CHMBR	Chamber
CHR	Cooper-Harper Rating
CHUTE	Parachute
CHX	Cabin Heat Exchanger
CI	Course (deviation display) invalid
CI	Color Interior Film
CI	Configuration inspection
CI	Configuration Item
CI	Certification Inspection
CI	Crew Interface
CI	Continuous Interlock
CIC	Command Interface Control
CIC	Control and Information Center
CICU	Computer Interface Control Unit
CICU	Computer Interface Conditioning Unit
CIA	Control Interface Assembly
CIA	Controller interface assembly
CIAP	Climatic Impact Assessment Program
CIB	Change Implementation Board
CIB	Change Impact Board
CiCC	Cargo Integration Control Center
CICU	Communication interface control unit
CiSS	Centaur integrated Support Structure
CID	Computer Interface Device
CIDL	Configuration Item Data List
CIDR	Critical Intermediate Design Review
CIE	Communications interface Equipment
CIF	Central Instrumentation Facility
CIG	Cable Integrity Group
CIG	Communications and Interface Group
CIL	Critical Items List
CIM	Computer Input Multiplexer
CIN	Change Identification Number
CIR	Circulate
CIR	Configuration inspection Report
CIR	Circle
CIR	Cargo Integration Review
CIRC	"Circularization Burn, OMS2"
CIRCUM	Circumference
CIRHS	Critical Items and Residual Hazards List
CIS	Contractor's Information Submittal
CIS	Central Integration Site
CIS	Component Identification Sheet
CIS	Communication Interface System
CIS	Change Impact Summary
CIS	Communications interface system
CIT	Critical Item Tag
CITE	Cargo Integration Test Equipment
CITE	Cargo integration test equipment
CIU	Communication interface unit
CIU	Computer Interface Unit
CIU	Controller Interface Unit
CIVT	Cargo Interface Verification Test
CK	Check
CKAFS	Cape Kennedy Air Force Station (Changed to CCAFS)
CKPT	Checkpoint
CKRA	Cape Kennedy Reference Atmosphere (Changed to CCR
CKS	Checks
CKT	Circuit
CL	Centerline
CL	Closed Loop
CL	Closed Loop Contro! Logic
CL	Close (Closed)
CL	Coefficient of Lift
CL	Cluster
Class	Classification
CLC	Change Letter Control
CLDST	Closed Loop Dynamic Stability Test
CLG	Ceiling
CLIP	Combined Laser Instrumentation Package
CLM	Care Logic Module
CLMC	Central Logistics Management Center
CLNR	Cleaner
CLR	Clear
CLRB	Cost Limit Review Board
CLS	Contingency Landing Site(s)
CLSO	Contingency Landing Support Officer
CLT	Closed Loop Test
cm	Centimeter
cm	Control Monitor
cm	Center of Mass
cm	Cargo Management
cm	Configuration Management
cm	Consumables Management
cm	Crew Module
CM&S	Communications Maintenance and Storage
CMA	Configuration Management Accounting
CMACS	Central Monitor and Control System
CMAO	Contract Management Assistance Officer
CMAT	Compatible Materials (List)
CMC	Command Module Computer
CMC	Crew Module Computer
CMD	Command
CMD DCDR	Command Decoder
CMG	Control Moment Gyro
CMM	Condition Monitored Maintenance
CMN	Crewman
CMO	Configuration Management Office
CMOS	Complementary Metal Oxide Silicon
CMP	Configuration Management Plan
CMPR	Compare
CMPRT	Compartment
CMPTD	Computed
CMPTR	Computer
CMPTR ACTY	Computer Activity
CMR	Center Materials Representative
CMRB	Contractor Material Review Board
CMRR	Common Mode Rejection Ratio
CMS-2	Cambridge Monitoring System (IBM Computer Program)
CMSi	Checkout/Control and Monitor Subsystem Interface
CMTS	Computerized Maintenance Test System
CMV	Common Mode Voltage
CN	Change Notice
CNDS	Condensate
CNRL	Communications and Navigation Research Laboratory
CNSL	Console
CNTL	Control
CNTR	Counter
CNTRL	Controller
CNTRL	Control
CNWDI	Critical Nuclear Weapons Design Information
CO	Carbon monoxide
Co	Cargo Operations (KSC Directorate)
Co	Cutoff
Co	Contracting Officer
Co	Change Order
CO2	Carbon dioxide
COA	Center Operations Area
COAS	Course Optical Alignment Sight
COAS	Crew(man) Optical Alignment Sight
COAS	Crewman optical alignment sight
COAX	"Coaxial, Coaxial Cable"
COB	Communications Office Building
COBE	Cosmic Background Explorer
COBOL	Common Business Oriented Language
COC	Close-Open-Close
COD	Center Operations Directorate (JSC)
COE	Corps of Engineer
COFI	Checkout and Fault Isolation (on Board)
COFR	Certificate of Flight Readiness
COFW	Certificate of Flight Worthiness
COIM	Checkout Interpreter (Software) Module
COL	Checkout Language
COL	Coast Orbital Insertion
COLM	Column
com	Computer Output Microfiche
com	"Common, Commonality"
com-m	Common Mode
comm	Communications
COMAS	Combined Orbital Maneuvering and Abort System
COMAT	Compatibility of Materials
COMB	Combustion
COMEC	Communications Security
COMMAND	Computer Command Engineer
COMP	Computation of Rendezvous Targeting
COMP	Component
COMP	Compensate
COMP	Compass
COMP	Computer
COMPEN	Compensator
COMPL	Completed
COMPOOL	Common Data Pool
COMPR	"Compress, Compressor"
COMPT	COmPartment
COMR&DSAT	Communication Research and Development Satellite
COMSAT	Communications Satellite
COMSEC	Communications Security
CON	Contact
CONCN	Concentration
COND	"Condition, Conditioner"
COND	Condenser
CONDR	Conditioner
CONF	Conference
CONFIG	Configuration
CONN	"Connect, Connector"
CONS	Console
CONSTR	"Construct, Construction"
CONT	Container
CONT	Contingency
CONT	"Continue, Continued, Continuous"
CONTAM	Contaminate
CONTIG	Contiguous
CONTR	"Control, Controller"
CONUS	Continental United States
CONV	Converter
COOP	Cooperative
COORD	Coordinate
COP	Contingency Operations Plan
COQ	Certificate of Qualification
COR	Contracting Officer Representative
CORE	Common Operational Research Equipment
COS	Carry-on Oxygen System
COS	Console Operating System
COS	Cosine
COSATI	Committee on Scientific and Technical Information
COSI	Closeout System Installation
COSTA	Cost Accounting (Code)
COV	Cutoff    Valve
CP	Cargo Projects Office (KSC)
CP	Cargo Program Office (KSC)
CP	Candle    Power
CP	Center of Pressure
CP	Cold Plate
CP	Console Processor
CP	Chemically Pure
CP	Circular  Pitch
CP	Control   Panel
CP	Control   Point
CP-DPO	Deployable Payloads Projects Office (KSC)
CP-FEO	Cargo Facilities and GSE Projects Office (KSC)
CP-PCO	Cargo Projects-Program Control Office
CP-SPO	Spacelab  Projects  Office  (KSC)
CPA	Contingency Planning Aid
CPA	Critical Path Analysis
CPAF	Cost Plus Award Fee
CPC	Computer    Program     Component
CPC	Central Planning Center
CPC	Characteristics  Properties  Code
CPC    I	Computer Program Change Instruction
CPCB	Crew  Procedures  Control   Board
CPCEI	Computer Program Contract End Item
CPCI	Computer Prograni Configuration Item
CPCL	Computer Program Control Library
CPCL	Computer Program Change Library
CPCR	Computer Program Change Request
CPCR	Crew Procedures Change Request (Form 482)
CPD	"Converter, Pulse to dc Voltage"
CPD	Crew Passive Dosimeter
CPD	Crew  Procedures   Division
CPD  R	Contractor's Preliminary Design Review
CPDDS	COmPuter Program Detail Design Specification
CPDS	Computer Program Design (or Development) Specificat
CPDS	Crew Procedures Documentation System
CPE	Chief Program Engineer
CPE  I	Computer Program End Item
CPES	Crew Procedures Evaluation (Evaluator) Simulator
CPF	Cost per Flight
CPF	Cargo Processing Facility
CPF	Central Processing Facility
CPFF	COst Plus Fixed Fee
CPG	Change Planning Group
CPI	Cross Pointer Indicator
CPI	Crosspointer indicator
CPIF	COst Plus Incentive Fee
CPL	Couple
CPLT	Complete
CPM	Computer   Program   Module
CPM	Critical Path Method
CPM	Cycles per Minute
CPMP	Crew Procedures Management Plan
CPR	Critical Problem Report
CPS	Cycles Per Second
CPSE	Common Payload SuPport EquiPment
CPSS	Cold Plate Support Structure
CPSS	Critical Phase System Software
CPT	Computer Program Tapes
CPT	Cargo Processing Technician
CPU	Central Processing Unit
CPU	Computer Printer Unit
CPU	Central processor unit
CQD  R	Critical Qualification Design Review
CR	Card Reader
CR	Certification Requirement
CR	Crew
CR	Control Room
CR	Change Request
CR	Configuration Review
CR/DIR	Change Request Directive
CRAS	Cost Reduction Alternative Study
CRB	Change Review Board
CRC	Contractor Recommended Code
CRC	Cost Reduction Curve
CRD	Change Request Disposition
CRDP	Computer Resources Development Plan
CRES	Corrosion Resistant Steel
CRG	Change Review Group
CRG	Correspondence Review Group
CRIS	Calibration Recall and Information System
CRISP	Computer Resources Integrated Support Plan
CRIT	Critical
CRM	Chemical Release Module
CRMD	Computer Resources Management Data
CRN	Contract Revision Number
CRN	Cable Routing Rotation
CRO	Cathode Ray Oscillograph(s) or Oscilloscopes
CRP	Configuration Requirements Processing
CRPL	Cosmic Ray Physics Laboratory
CRR	Critical Requirements Review
CRR	Computer Run Report
CRS	Cross
CRS	Course
CRS	C02 Reduction Subsystem
CRSFD	Crossfeed
CRSI	Ceramic Reusable Surface Insulation
CRSVR	Crossover
CRT	Cathode-Ray Tube
CRT	Cathode ray tube
CRTG	Cartridge
CRW	Control Read/Write
CRYO	Cryogenic
cs	STS Cargo operations (KSC Directorate)
cs	Common Set
cs	Consumables Status
cs	Change Status
cs	Checkout Station
cs	Control Segment
cs	Core Segment
cs	Crew Station
cs	Spacelab Operations Directorate
CSA	CYclic Strain Attenuator
CSAM	Crinkled Single Aluminized Mylar
CSAS	ComPuterized Status Accounting System
CSAT	Combined Systems Acceptance Test
csc	Computer Sciences Corporation
csc	Cosecant COMPuting Amplifier
csc	Conical Shaped Charge
csc	Contingency SuPport Center (CCAFS)
CSCB	Contractor's Summary Cost Breakdown
CSCSAT	Commercial Synchronous Communication Satellite
CSD	Crew Systems Division
CSD	Control System DeveloPment
CSD	Chemical Systems Division
CSD L	Charles Stark Draper Laboratory (MIT)
CSDD	Control Systems DeveloPment Division (JSC)
CSDF	Central Source Data File
CSDT	COMPuter Software Data Tapes
CSE	Communications Systems Engineer
CSE	Computer Support Equipment
CSE	Configuration Switching EquiPment
CSE	Common Support EquiPment
CSF	Cost Sensitivity Factor
CSF	Central Supply Facility
csi	Coelliptic Sequence Initiation
csi	Control Servo Input
csi	Crew Software Interface
CSIR	Review
CSIR	Computer Systems (Hardware/Software) Integration
CSL	Crew Systems Laboratory
CSL	Computer Status Lights
CSL	Command Signal Limiter
CSOP	Crew Systems Operating Procedures
CSP	Computer   Support    Program
CSPU	Coi-e Segment Processing Unit
CSR	Crew Station Review
CSR	Check Signal Return
CSR	Crew Station Review
CSR	Certification  Status  Report
CSRP	Computers and Software Review Panel
CSS	Control stick steering
CSSE	Control System Simulation Equipment
CST	Crew Station Trainer
CST	Contract Supplemental Tooling
CST	Crew Systems Trainer (One-G Trainer)
CST	Combined Systems Test
CST	Central Standard Time
CSTA	Crew  Software  Training  Aid
CSTR	Canister
CSTS	Cryogenic Storage and Transfer System
CSiU	Core Segment Interface Unit
csm	Computer Status Matrix
csm	Command Service Module
csm	Common Support Module
csoc	Consolidated Space Operations Center
css	Control Stick Steering
css	Computer Subsystem
css	Core Segment Simulator
CT	Crawler Transporter
CT	Current Transformer
CTA	Computer Technology Associates (GSFC)
CTA	Controlled  Thrust   Assembly
CTC	"Camera, Timing, and Control"
CTC	Chief Test Conductor
CTE	Central   Timing    Equipment
CTI	Critical Transportation  Item
CTIS	Crawler Transporter Intercom System
CTL	Central or Control
CTL	Canoga Test Laboratory
CTM	Crystalline Transitional Material
CTM	Contract  Technical   Manager
CTN	Certification  Test   Network
CTP	CYclic Time Processor
CTP	Communications Timing Procedure
CTPD	Crew Training and Procedures Division (JSC)
CTR	Contract Technical Representative
CTRS	Component Test Requirements Specifications
CTS	Ci'mPuter Test Set
CTS	COMPuterized Training System
CTS	Communications and Tracking System
CTS	Canadian Technology Satellite
CTSD	ComPuter Test Sequences Document
CTSD	Coordinate Transformation SYstem
CTTB	Checkout Techniques Test Bed
CTU	Central Timing Unit
CTWT	Counterweight
CUB	Commonality Usage Board
CUDS	Cumulative Data Statistics
CUE	Common Usage Equipment
CUF	Cross Utilization File
CUIL	COmmon Usage Item List
CUP	Commonality Usage ProPosal
CVAD	"Converter, Voltage, ac to dc"
CVAS	Configuration Verification Accounting System
CVDA	"Converter, Voltage Discrete, ac"
CVE	Complete Vehicle Erector
CVR	Change Verification Record
CVR	Configuration Verification Review
CVRD	"Converter, Variable Resistance, to dc Voltage"
CVT	Communications Vector Table
CVT	Concept Verification Testing
CWA	Clean Work Area
CWA	Caution and Warning Annunciator
CWA	Controlled Work Area
CWE	Caution and Warning Electronics
CWEA	Caution and Warning Electronic Assembly
CWEU	Caution and Warning Electronics Unit
CWFSP	Caution and Warning/Fire Suppression Panel
CWG	Constant Wear Garment
CWLM	Caution and Warning Limit Module
CY	Calendar Year
CY	Cycle
CYL	Cylinder
cu	Control Unit
cu	Cubic
cuc	ComPuter Usage Control
cum	Cumulative
cv	Check Valve
cv	Coefficient of Variation
cv	Deployable Payloads Operation (KSC Co Dir.)
cv	Expendable Vehicles Operations (KSC Directorate)
cvm	Control Valve Module
cw	Continuous Wave
cw	Command Word
cw	Clockwise
cws	Caution and Warning System
cws	Caution and Warning Status
cwsu	Caution and Warning Status Unit
cwsu	Condensate Water Servicing Unit
cx	Color Exterior Film
[D]
dB	Decibel
dP/dT	Delta pressure/delta time
dc	DCAS          Data Collection and Analysis System
dc	DCAR          Design Corrective Action Report
dc	Defense Contract Administration Services
dc	DCAA          Defense Contract Audit Agency
dc	Design Change Authorization
dc	Digital Command Assembly
dc	DCA          Defense Communication Agency
dc	Direct Current
dc	Distribution Control Assembly
D	Deck
D	Drag
D	Down
D	Delta
D	Deliver (Delivery)
D   LSC	DLTR            Data Link Terminal Repeater
D   LSC	DLSM            Data Link Summary Message
D   LSC	Defense Logistics Service Center
D   LSC	Data Link Transmission Repeater
D&C	DisplaY and Control (C&D preferred)
D&C	Displays and controls
D&CS	Display and Controls Subsystem
D&O	DescriPtion and Operations
D&P	Drain and  Purge
D/A	Digital to Analog
D/C	DisplaYs/Controls
D/L	Deorbit/Landing
D/L	Data Link
D/L	Downlist
D/L	Downlink
D/VD	Data/Voice  Data
DA	Distribution Assembly
DA	Double AmPlitude
DA	Data Acquisition
DA	Deployment   Assembly
DA	Distribution assembly
DA	Deployed assembly
DA&D	Data Acquisition and Distribution
DAB	Data Acquisition Bus
DABS	Discrete Address Beacon SYstem
DAC	Data Acquisition and Control
DAC	Data Acquisition Camera
DAC	Digital to Analog Converter
DAC	Digital to AnalYtical Conversion
DACB	Data Acquisition and Control Buffer
DACBU	Data Acquisition and Control Buffer Unit
DACS	Digital Acquisition and Control System
DACS	Data Acquisition and Control System
DACT	DisPosable Absorption Collection Trunk
DADE	Data Acquisition and Decommutation EquiPment
DADS	Dual Air Density Satellite
DAE	Data Acquisition EquiPment
DAF	Data Acquisition Facility
DAF	Data Analysis  Facility
DAFT	Data Acquisition Frequency Table
DAIS	Data Avionics Information System
DAL	Data  Acquisition  List
DAL	Data Accession List
DAL	Data Aided Loop
DAM	Double Aluminized Mylar
DAM	Driver Amplifier Module
DAP	Data  Acquisition  Plan
DAP	Digital Autopilot
DAP	Digital autopilot
DAR	Data Aided Receiver
DAR	Digital Autopilot Requirements
DAR	Deviation Approval Request
DAR	Drawing Analysis Record
DARS	Data Acquisition and Reduction System
DARTS	Digital Automated Radar Tracking System
DAS	Documentation Accountability Sheet
DAS	Digital Avionics System
DAS	Digital Address System
DAS	Data  Analysis  Station
DAS	Data Acquisition System
DASA	Dual Aerosurface Servo Amplifier
DATE	"Dynamics, Acoustics, and Thermal Environment"
DAU	Digital Adapter Unit
DAU	Data  Acquisition  Unit
DAV	Data Available
DAV   L	Data Available-Low
DB	Deadband
DB	Data Base
DB	Data Bus
DB	Dry Bulb
DB	Distribution Box
DB	Design Baseline
DBC	Data Bus Coupler
DBC	Data Bus Control
DBC	Data bus coupler
DBCI	DB with Respect to a Circular Polarized Antenna
DBE	Data Bus Element
DBFN	Data Bus File Number
DBFN	Data Base File Number
DBFN	DBG          Data Bus Group
DBGMP	DBL          Double
DBGMP	Data Bus Generation and Maintenance Package
DBGMP	Data Bus Isolation Amplifier
DBGMP	DBIA          Data Bus Interface Adapter
DBGMP	DBI          Data Bus Interface Unit-Launch
DBGMP	DBIU          Data Bus Interface Unit
DBGMP	DBS          Data Base System
DBGMP	dBM          Decibels Referred to I Milliwatt
DBGMP	DBN          Data Bus Network
DBGMP	DBP          Design Baseline Program
DBGMP	DBRN          Data Bank Release Notice
DBGMP	DBM          Data Base Management
DBGMP	dBW          Decibels Referred to I Watt
DBGMP	DBW          Data Bus Wire
DBGMP	DBUR          Data Bank Update Request
DBIA	Data bus isolation amplifier
DBN	Data bus network
DC	DeveloPment-Center
DC	Data Coordinator
DC	Display Coupler
DCC	Data ComPutation Complex
DCC	Display COMPuter Control Unit
DCC	Document Control Center
DCC	Digital Communications and Control Unit
DCC	DCCU          Digital Command and Control Unit
DCC	Data computation complex (JSC)
DCIB	Data Communication InPut Buffer
DCIM/DSCIM	Display SYstem Computer Input Multiplexer
DCIU	Digital Control and Interface Unit
DCKNG	Docking
DCL	Document Change List
DCM	Direction Cosine Matrix
DCM	DECOM  Control   Memory
DCM	Display and Control Module
DCM	Display and control module
DCMB	Development Configuration Management Board
DCN	Design Change Notice
DCN	Document Change  Notice
DCN	Drawing Change Notice
DCNP	Document Change Notice Proposal
DCO	Detailed Checkout
DCOP	Detailed Checkout Procedures
DCOP	"Displays, Controls, and Operations Procedures"
DCP	Data Collection Platform
DCP	Depot Condemnation Percent
DCP	DEU Control Program
DCP	Development Cost Plan
DCPEI	DEU Control Program End Item
DCR	Design Change Request
DCR	Design Certification Review
DCR	Document Change Record (or Review)
DCR	Design Concern Report
DCS	Data Communication System
DCS	Design Criteria Specification
DCS	Design Communication System
DCS	Detail Checkout Specification(s)
DCS	Digital Command System (Subsystem)
DCS	Display and Control System
DCS	Document Control System
DCS	Dual Checkout Station
DCS	Data Control System
DCSI	Data and Cqntrol Signal Interface
DCSP	Digital Control Signal Processor
DCSU	Digital Computer Switching Unit
DCU	Digital Computer Unit
DCU	Display and Control Unit
DCV	Direct Current Volts
DD	Data Depository
DD	Mechanical and Facilities Engineering (KSC DE Dir.)
DD	Directives Documentation
DD	Dedicated Displays
DD	Data Display
DD	Decoder Driver
DD&CS	Dedicated Display and Control Subsystem
DD/HH:MM:SS	Day/Hour:Minute:Second
DDA	Digital Differential Analyzer
DDA	ICD Departure Authorization
DDAS	Digital Data Acquisition System
DDC	Defense Documentation Center
DDC	Data Distribution Center
DDC	Digital Data Cell
DDD	Display Decoder Drive
DDD	Design Definition Document
DDDL	Digital Data Downlink
DDDU	Digital Decoder Driver Unit
DDI	Dedicated Display Indicator
DDI	Discrete Data input
DDI	Discrete Digital Input
DDIS	Data Depository Index System
DDL	Data Downlink
DDM	Data Display Module
DDM	Data Display Monitoring
DDM	Discrete Data Management
DDMS	DOD Manager for Space Shuttle Support
DDO	Discrete Digital Output
DDP	Design Development Plan
DDP	Digital Data Processing (Processor)
DDPC	Digital Data Processing Center (Complex)
DDPF	Dedicated Display Processing Function
DDPS	Digital Data Processing System
DDR	Data Discrepancy Report
DDR	Design Development Record
DDR	Detail Design Review
DDS	Documentation Distribution System
DDS	Data Display System
DDS	Detailed Design Specification
DDT&E	"Design, Development, Test, and Engineering/Evaluatio"
DDT&E	"Design, Development, Test, and Evaluation"
DDT&E	"Design, development, test and evaluation"
DDTF	Dynamic Docking Test Facility
DDTS	Dynamic Docking Test System
DDU	Decommutator Distribution Unit
DDU	Data Display Unit
DDU	Display Driver Unit
DDU	Display driver unit
DE	Design Engineering (KSC Dir.)
DE	Doppler Extractor
DE	Dynamics Explorer
DEA	Deployed electronics assembly
DEACT	Deactivate
DEC	Declination
DECL	Direct Energy Conversion Laboratory (JSC)
DECOM	"Decommutate, Decommutator"
DECR	Decrease
DECS	Civil Engineering Office at Vandenberg
DECU	Data Exchange Control Unit
DED	"Dedicate, Dedicated"
DEDA	Data Entry and Display Assembly
DEE	Digital Events Evaluator
DEF	Definition
DEFL	Deflect
DEG	Degree
DEI	Design Engineering Identification
DEIS	Design Engineering Inspection Simulation
DEIS	Design Evaluation Inspection Simulator
DEL	"Deliver, Delivery"
DEL	"Deorbit, Entry, and Landing"
DELTA-T	Difference in Temperature
DEMOD	"Demodulate, Demodulator"
DEMUX	Demultiplexer
DEORB	Deorbit
DEPL	Deploy
DEPRESS	Depressurize
DEPT	Department
DER	Drawing Error Report
DERIGID	Derigidize
DES	Data Exchange System
DES	"Descend, Descent"
DESAT	Desaturated
DESC	Descent
DESIG	Designate
DESPOT	Design Performance OPtimization
DEST	Destination
DET	Detent
DET	Detail
DETN	Detection
DETR	Detector
DEU	Display Electronic(s) Unit
DEU	Display electronics unit
DEV	"Develop, Development"
DEVN	Deviation
DEW	Distant Early Warning
DF	Direction Finder (Finding)
DF	Disassembly Facility
DF	Development-Forward
DF	Development  Flight
DF	Display Functions
DF-SPE-A	Shuttle Project Engineering Office
DFCS	Digital Flight Control Software (System)
DFE	Data Flow  Engineer
DFE	Direction Finding Equipment
DFG	Display Format Generator
DFI	Development Flight Instrumentation
DFI	Development flight instrumentation
DFR	Defrost
DFRC	Hugh L. Dryden Flight Research Center
DFRF	Dryden Flight Research Facility
DFRN	Differential
DFRN PRESS	Differential Pressure
DFS	Directional Finding System
DFS	Dynamic Flight Simulator
DFVLR	Deutsche Forschungs-und Versuchsanstalt Luft-u
DG	Display Generator
DH	Decision Height
DHA	Design Hazards Analysis
DHE	Data-handling equipment
DHS	Discrete Horizon Sensor
DI	Display Interface Processor (Software Functional Element)
DI	Display Interface
DI	Discrete Input
DI	Development Integration
DI	Data Integrator
DIA	Diameter
DIAG	Diagonal
DIAGN	Diagnose
DIDS	Defense Integrated Data System
DIF	Discrete Increment Filter
DIF	Difference
DIFF	Differential
DIGI	Digital
DIH	Discrate Input High
DIH	Discrete Input High
DIL	Deliverable Items List
DIL	Discrete Input Low
DIM	Design Interface Meeting
DIMEN	Dimension
DIP	Designated Inspection Point
DIP	Display Input Processor
DIP	Display Interface Processing (Processor)
DIPEC	Defense Industrial Plant Equipment Center
DIPL	Display Initial Program Load
DIR	Direct
DIR	Document Information Record
DIS	Documentation Index System
DIS	Disagree
DISAP	Disapproved
DISASSY	Disassembly
DISC	Discone
DISC	Disconnect
DISC	Discrete
DISCH	Discharge
DISENG	Disengage
DISP	Dispenser
DISP	Display
DIST	Distribution
DISTR	DIU            Dynamic Integrated Test
DISTR	Digital Interface Unit
DISTR	DIV            Division
DISTR	DIT            Data ld Table
DISTR	Distributor
DK	Docking
DK	DisplaY/Keyboard
DK	Deck
DK	Display keyboard
DL	Downlink
DL	DeveloPment-Left
DL	Electronics Engineering (KSC DE Dir.)
DLAT	Destructive Lot AccePtance Testing
DLC	Direct Lift Control
DLS	Dynamic Load Simulator
DLY	Delay
DM	Docking Mechanism
DM	"Document, Documentation"
DM	Disassembly Manual
DM	DeveloPmental Instrumentation MDM.Mid
DM	DeveloPment Motor
DM	Data Manager
DMA	Direct MemorY Access
DMA	Direct MemorY Address
DMC	Drive Motor Assembly
DMC	Direct Maintenance Cost
DMC	Data Management ComPuter
DMCF	"Deservicing, Ma ntenan"
DME	Distance Measur ng EquiPment
DME	Distance-measuring equipment
DMG	Data Management Group
DMIA	Dual Multiplexer Interface Adapter
DMIS	Data Management Information System
DML	Developmental Instrumentation MDM-Left
DMON	Discrete Monitoring
DMP	Dump
DMP	DEU Message Processor
DMP	Deployable Maintenance Platform
DMR	Developmental Instrumentation MDM-Right
DMS	Data Management System
DMS	Docking Mechanism System (Subsystem)
DMS	Docking Module Subsystem
DMS	Dynamic Motion Simulator
DMSS	Data Management System Simulator (CVT)
DN	Down
DN	Discrepancy Notice
DNA	Does Not Apply
DNLK	Downlink (D/L preferred)
DNLT	Downlist
DNO	Descending Node Orbit
DNP	Dynamic Nuclear Polarization
DO	Discrete Output
DOA	DePartment of Agriculture
DOC	Department of Commerce
DOC	"Document, Documentation"
DOD	Department of Defense
DOD	Department of Defense
DOD-STP	Department of Defense-Standard Satellite
DODD	Department of Defense Directive
DOE	Department of Energy
DOF	Direction of Flight
DOF	Degree-of-Freedom
DOH	Discrete Output High
DOI	Descent Orbit Insertion
DOL	Department of Labor
DOL	Discrete Output Low
DOMSAT	Domestic Satellite
DOMSAT	Domestic satellite
DOP	Diver Operated Plug
DOS	Disk Operating System
DOSIM	Dosimeter
DOT	Department of Transportation
DOT	Deployment Operations Team
DOT/CIAP	DOT Climatic impact Assessment Program
DOY	Day of Year
DP	Double Precision
DP	Differential Pressure
DP	Development Phase
DP	Data Processing
DP	Double Pole
DP	Design Proof
DP	Deployable Payload
DP	Delayed Procurement
DP&S	Data Processi.ng  And  Software
DP&SS	Data Processing and Software Subsystem
DP/DT	Delta Pressure/Delta Time
DPA	Data Processing Assembly
DPA	Data processing assembly
DPI	Detail Program Interrelationships
DPLR	DOPPler
DPM	Dual port Memory
DPN   L	Distribution Panel
DPP	Definition Phase Review
DPP	E)eve@opment-Right
DPP	Design Review
DPP	"Discrete Registe,"
DPP	Dispatch BeliabilitY
DPP	D'isposit'lon Record
DPP	Data Processing and Software
DPP	Deployment Pointing Panels
DPP	Door
DPP	Discrepancy R12POrt
DPP	Data Processing System (Subsystern)
DPP	Data Processing Software System
DPP	Data Requirements and AnalYsis
DPP	Drive
DPS	Data processing system
DPT	Design Proof Test
DPY	Deploy
DR	Dead Reckoning
DRA	Data Release Authorization
DRB	Design Review Board
DRB	Design Requirements Baseline
DRC	Data Reduction Center
DRC	Discrete Rate Command
DRD	Document Requirement Description
DRD	Data Requirement Description
DRD	Detailed   Requirements    Document
DRD	Data Requirements Document
DRF	Data  Request   Form
DRF	"Digital, Radio Frequency"
DRF	Documentation   Requisition    Form
DRG	Digital Ranging Generator
DRI	Data Rate  Indicator
DRIRU	Dry Rotor Inertial  Reference  Unit
DRK	Display Request Keyboard
DRL	Data Requirements List
DRL	Document Requirements List
DRM	Data Records Management
DRM	Design Reference Mission
DRM	Drawing Requirements Manual
DRN	Drain
DRO	Document Release Order
DROG	Drogue
DRR	Design Requirements Review
DRR	Data Recorder/Reproducer
DRS	Digital Range Safety
DRS	Data Relay Satellite
DRS	Data Relay Station
DRSS	Discrepancy  Report  Squawk   Sheet
DRT	Design Reference Timeline
DRUC	Disposition Record Unsatisfactory Condition
DS	Data Storage
DS&   R	Data Storage and Retrieval
DSA	Defense Supply Agency
DSAD	Data Systems and Analysis Directorate (JSC)
DSB	Document Status Bulletin
DSB	Double Side Band
DSC	Data Separator  Card
DSC	Dedicated signal conditioner
DSN	Deep-Space Network
DTP	Detail Test Plan
DTPR	Detailed Test Procedures
DTRD	Development Test Requirements Document
DTS	Data Transmission System
DTS	Data Transfer System
DU	Display Unit
DU	Display unit
DUA	Digital Uplink Assembly
DUC	Digital Uplink Command
DUM	Dummy
DUPLX	Duplex
DUPLXR	Duplexer
DUR	Duration
DV	Designated Verification
DV	Differential Velocity
DV	Designee for Verification
DVD	Delta Velocity Display
DVM	Digital Voltmeter
DVS	Design Verification Specification
DVS	Digital Voice System
DVT	Design Verification Testing
DW	Data Word
DWG	Drawing
DWI	Data Word in
DWS	Disaster Warning Satellite
DWV	Dielectric Withstanding Voltage
DY	Deputy Director (KSC Directorate)
DYN	Dynamic
[E]
E	East
E LACS	Extended Life Attitude Control System
E LSC	Earth Landing Sequence Controller
E LSS	Emergency Life Support System
E&D	Engineering and Development
E&D	Engineering and DeveloPment Directorate (JSC)
E-E	End-to-End
E-MUX	Electrical Multiplex
E-P	Electron/Proton
E/0-ims	E/0-Information Management System
E/C	Encoder/Coupler
E/L	Entry/Landing
E/M	Engineering  Model
E/O	Engineering/Operations
E/W	Energy to Weight  Ratio
E/W	Energy Over Weight
EA	Electronic Assembly
EA	Each
EA	Elevation Angle
EAC	Energy Absorbing Capacity
EAC	Estimate at  Completion
EAD	ElectricallY Alterable Device
EADI	Electronic Attitude Director Indicator
EAFB	Ellington Air Force Base
EAFB	Elgin Air Force Base
EAFB	Edwards Air Force  Base
EAFB	Edwards Air Force Base
EAM	Electrical Accounting Machine
EAR	Engineering AnalYsis Report
EAS	Equivalent Air Speed
EAS	Equivalent airspeed
EAT	Environmental Acceptance Test
EB	Emergency Box
EB	Electronic Beam
EBC	Emulated Buffer COMPuter
EBCDC	Extended Binary Coded Decimal
EBD	Eyeballs Down (+GZ)
EBI	Eyeballs in (+GX)
EBL	Eyeballs Left (+GY)
EBO	Eyeballs Out (-GX)
EBR	Eyeballs Right (-GY)
EBS	Emergency Breathing Subsystem
EBU	Eyeballs Up (-GZ)
EBW	Exploding Bridge Wire
EBW	Electron Beam Welding
EC	Element Contractor
EC	Engine Control
EC	Engine Cutoff
EC	Events Coupler
EC	Essentiality Code
EC	Experiment Computer
EC	Events Controller
ECA	Engineering Change Analysis
ECA	Electronics Control Assembly
ECA	Epoxy Curing Agent
ECAS	Experiment Computer Application Software
ECB	Engineering Change Board
ECB	Event Control Block
ECB	Events Control Buffer
ECC	Engineering Critical Component
ECC	Engineering Change Control
ECCB	Engineering Change Control Board
ECD	Engineering Control Drawing
ECD	Estimated Completion Date
ECEP	Experiment Checkout Equipment Processor
ECF	Equivalency Capability File
ECF	Element Charge Factor
ECG	Electrocardiogram
ECG	Electrocardiograph
ECI	Earth Centered Inertia (inertials)
ECIO	Experiment Computer Input/Output
ECL	Entry Closed Loop
ECLS	Environmental Control and Life Support
ECLSS	Environmental Control and Life Support System
ECLSS	Environmental control and life support system
ECN	Engineering Change Notice
ECO	Engine Cutoff
ECO	Engine Combustion
ECO	Engineering Change Order
ECOS	Experiment Computer Operating System
ECP	Explicitly Coded Program
ECP	Engineering Change Proposal
ECP	Engineering Control Proposal
ECP	Engineering Change Program
ECR	Engineering Change Request
ECRA	Engineering Change Request/Authorization
ECS	Environmental Control System (Subsystem)
ECS	Engine Control SYstem
ECU	Environmental Control Unit
ECU	Electronic Coupling Unit
ECU	Electrical control unit
ED	Explosive Device
ED	Edge Distance
ED	Engineering Directive
ED	Edit
EDA	Elevation Drive Assembly
EDA	Electronic DisPlay Assembly
EDB	Environmental Data Book
EDC	Engineering Design Change
EDC(M)	Electrochemical DePolarized CO (Module)
EDCP	Engineering Design Change ProPosal
EDDR	Electron DiPole-DiPole Reservoir
EDF	Engineering Data File
EDLN	Engineering DeveloPment Logic Network
EDP	Electonic Data Processing
EDPE	Electronic Data Processing EquiPment
EDPM	Electronic Data Processing Machine
EDR	Engineering Design Review
EDS	Emergency Detection System
EDS	Electrical Distribution System
EDT	Explosive Device System
EDT	Eastern Daylight Time
EDU	Engineering DeveloPment Unit
EDV	Electronic Depressurizing Valve
EDW	Edwards (TACAN Station)
EDW	"Edwards Air Force Base, CA (Deorb OPT site)"
EE	End Effector
EECOM	"EleCtrical, Environmental, and Communications"
EECOM	"Electrical, Environmental, Consumables, and Mechanical"
EECOM	Systems (MPSR)
EED	Electro (Electrical) Explosive Device
EED	Electroexplosive device
EEE	"Electronic, Electrical, Electromechanical"
EEEU	End Effector Electronics Unit
EEG	Electroencephalogram
EEH	EMU Electrical Harness
EEIS	End-to-End Information System
EEL	Electrical  Equipment  List
EEM	Earth   Entry   Module
EENT	"Eye, Ear, Nose, and Throat"
EES	Emei@gency  Ejection  Suits
EES	Ejection  Escape  Suit
EES	Escape ejection suit
EET	Entry   Elapsed   Time
EETB	Electronic Electrical Termination Building
EEVT	Electrophoresis Equipment Verification Test
EFA	Experiment Flight Applications
EFCS	Earth Fixed Coordinate System
EFF	Efficiency
EFFGRO	Efficient Growth (Computer Program)
EFP	ESA Furnished Property
EFTO	Encrypted for Transmission Only
EG	Entry Guidance
EGA	Evolved  Gas  Analysis
EGC	Experiments Ground Computer
EGF	"Electrical, Grapple Fixture"
EGIL	"Electrical, General Instrumentation, and Lighting E"
EGRET	Energetic Gamma Ray Explorer Telescope
EGRS	Egress
EGSE	Electrical Ground Support Equipment
EGT	Elapsed  Ground   Time
EGT	Estimated Ground Time
EGT	Exhaust Gas Temperature
EGUN	Fast Pulse Electron Gun
EH/M	Extension Hose/Moi!thpiece
EHC	Electrical Heating Control
EHF	Extremely  High   Frequency
EHOT	External Hydrogen/Oxygen Tank
EHP	Effective   Horsepower
EHP	Electrical  Horsepower
EHR	Earned Hour Ratio
EHS	Environmental Health Services
EHX	Experiment Dedicated Heat Exchanger
EI	Entry interface
EIA	Electrical Industries Association
EIASN	End Item Assembly Sequence Number
EIC	Experimental Intercom
EID	End Item Documentation
EIDP	End Item Data Package
EIFA	Element Interface Functional Analysis
EIR	Environmental Impact Report
EIRP	Effective lsotropic Radiated Power
EIS	Electrical Integration SYstem
EIS	Environmental Impact Statement
EIS	End Item Specification
EIS	Extended Instruction Set
EIT	Entry Interface Time
EIU	Engine Interface Unit
EIU	Engine interface unit
EIVT	Electrical and Instrumentation Verification Test
EIVT	Electrical Interface Verification Test
EIVT	Electronic Installation Verification Test
EJN	Ejection
EKG	Electrocardiogram (Record)
EKG	Electrocardiograph (Instrument)
EL	Elastic Limit
EL	Elevation Angle
EL	Elevate
EL	Electroluminescent
EL MECH	Electromechanical
ELB	Elbow
ELDISC	Electrical Disconnect
ELDV	Electrically Operated Depressurization Valve
ELEC	Electronic
ELEC	Electric
ELECT	Electrical
ELECTR	Electronics
ELEV	Elevon
ELF	Extremely Low Frequency (1 Hz to 3 kHz)
ELINT	Electromagnetic Intelligence
ELMCH	Electromechanical
ELMS	Elements
ELMS	Elastic Loop Mobility System
ELS	Earth Landing System (Subsystem)
ELS	Eastern Launch Site
ELS	Elevon Load System
ELT	Emergency Locator Transmitter
ELV	Earth Launch Vehicle
ELV	Electrically Operated Valve
ELV	Expendable Launch Vehicle
ELVN	Eleven
EM	Exception Monitor
EM	Emergency
EM	Engineering Model
EMA	Electromagnetic Analysis
EMC	Electromagnetic Compatibility
EMCC	Emergency Mission Control Center
EMCD	Electro-Mechanical Control Diagram
EMCI	Engineering Model Configuration Inspection
EMD	Entry Monitor Display
EMEC	Electromagnetic Effects Capability
EMEC	Electromagnetic Effects Compatibility
EMER	Emergency
EMES	"Electriral, Mechanical, and Environmental Systems"
EMF	Electromagnetic Force
EMF	Electromotive Force
EMG	Electromyograph(gram)
EMG	Surface Electromyograms
EMI	Electromagnetic Interference
EMIS	Emission
EMK	Emergency Medical Kit
EMK	Emergency medical kit
EML	Electromagnetic Laboratory
EMN	Engineering Management Network
EMON	Exception   Monitoring
EMP	Electromagnetic  Pulse
EMP	EquiPment Mounting Plate
EMPGS	Electrical/Mechanical Power Generation SubsYstem
EMR	Engine Mixture Ratio
EMRL	Equipment Maintenance Requirements List
EMS	Entry Monitor Subsystem
EMS	Engineering Master Schedule
EMS	Entry Monitoring system
EMS	Electromagnetic Susceptibility
EMSS	Electromagnetic Servoactuator SYstem
EMT	Electro-Mechanical Test
EMU	Extravehicular Mobility Unit
EMU	Engineering Model Unit
EMU	Extended  Memory  Unit
EMU	Extravehicular mobility unit
EMU-TV	Extravehicular MobilitY Unit - Television
ENA	Enable
ENC	Encode
ENCD	Encode
ENCL	Enclose
END EFF	End Effector
ENDF	Evaluated Neutron Data File
ENG	"Engine, Engineer"
ENG	ElectronYstagnogram
ENGR	Engineer
ENGRG	Engineering
ENT	Entry
ENVIR	"Environment, Environmental"
EO	Earth Orbit
EO	Earth Observation
EOC	End of Contract
EOC	Engine Order Capability
EOC	Engine-out Capability
EOD	Estimated  on   Dock
EOD	Explosive Ordnance Disposal
EODB	End  of  Data  Block
EOF	End of  File
EOG	Electroculogram
EOHT	External Oxygen and Hydrogen Tanks
EOI	Earth Orbit Insertion
EOL	End of  Line
EOM	Equations of Motion
EOM	Engineering Operations Manual
EOM	End of Mission
EOM	End of Message
EOMF	End of Minor Frame
EOP	Emergency Oxygen Pack
EOP	Experiments of Opportunity
EOP	Earth and Ocean Physics
EOPAP	Earth and Ocean Physics Application Program
EOPO	Equal Opportunity Program Office
EOR	Earth Orbit Rendezvous
EOS	Earth Orbit  Shuttle
EOS	Emergency Oxygen Supply
EOS	Emergency Oxygen System
EOS	Extended Operating System
EOS	Earth Observation Satellite
EOT	End of  Tape
EOT	End of Transmission
EOW	Energy  over  Weight
EP	Elbow  Pitch
EP	Environmental Protective Plan
EP	Electrical Power
EPA	Environmental Protection Agency
EPC	Error Protection Code
EPC	External Power Contractor
EPCDC	"Electrical Power Conditioning, Distribution, and"
EPCDC	Control
EPD	Emergency Procedures Document
EPD	Electrical Power Distribution
EPDB	Electrical Power Distribution Box
EPDB	Experiment Power Distribution Box
EPDC	Electrical Power Distribution and Control
EPDCS	Electrical Power Distribution and Control System
EPDS	Electrical Power and Distribution Subsystem
EPDS	Electrical Power Distribution System
EPDS	Electrical power distribution subsystem
EPDU	Electrical power distribution unit
EPG	Electrical Power Generator
EPL	Electrical Power Level
EPL	"Electronic, Electrical, and Electromechanical Parts"
EPL	List
EPL	Emergency Power Level
EPMS	Engineering Performance Management System
EPO	Element Project Office
EPOC	External Payload Operations Center
EPPS	Electrical Power/Pyro Sequential System
EPR	Engine Pressure Ratio
EPRN	Emergency Program Release Notice
EPROM	Erasable Programmable Read Only Memory
EPS	Electrical Power System (Subsystem)
EPS	ExPerimental Power Supply
EPS	Electrical power system
EPSP	Experiment Power Switching Panel
EPT	Emergency Procedure Trainer
EPT	Ethylene Propylene Terpolymer
EPTU	Events per Time Unit
EPWG	Environmental Projects Working Group
EQ	Equivalent
EQE	Event Queue Element
EQL	Equal
EQUIP	Equipment
EQUIV	Equivalent
ER	Explanation Report
ERA	Electrical Replaceable Assembly
ERAP	Earth Resources Aircraft Program
ERB	Engineering Review Board
ERBE	Earth Radiation Budget Experiment
ERBS	Earth Radiation Budget Satellite
ERC	Event Recorder
ERCA	Electrochemically Regenerable CO2Absorber
EREP	Earth Resources Package
ERG	Ergometer
ERNO	"of European Consortium, VFW-Fokker-Mannheim,"
ERNO	Germany (SPacelab Contractor)
ERO	Engineering Release Operations
ERP	Effected Radiative Power
ERP	Eye Reference Point
ERP	Effective  Radiation  Power
ERPM	Engineering Requirements and Procedures Manual
ERR	Error
ERR CNTR	Error Counter
ERRC	Expendability/Recoverability/Repair Capability
ERS	Engineering Release  System
ERS	Entry and Recovery Simulation
ERS	Earth  Recovery   Subsystem
ERSI	Elastomeric Reusable Surface insulation
ERSIR	Earth Resources Shuttle Imaging Radar
ERTS	Earth Resources Technology Satellite
ERU	Earth Rate Unit
ERV	Expiratory  Reserve  Volume
ES	Experiment Segment
ES	Escape System
ESA	Engineering SuPPly Area
ESA	Engineering SuPPort Assembly
ESA	European Space Agency
ESA	ExPlosive Safe Area
ESA	European Space Agency
ESA	Explosive safe area (KSC)
ESB	Essential Switching Box
ESC	Escape
ESCA	Electron Spectroscopy for Chemical Analysis
ESCU	Extended Service and Cooling Umbilical
ESD	Experiment Systems Division
ESD	Emergency Shutdown
ESDAC	"European Space Data Center (Darmstadt, Germany)"
ESDU	Event Storage and Distribution Unit
ESE	Electrical Support Equipment
ESE	Electronic SuPport Equipment
ESE	EVA Support Equipment
ESF	Explosive Safe Facility
ESI	Electrical System Integration
ESMC	ETR
ESMC	"Eastern Space and Missile Center (formerly AFETR), also"
ESO	Event Sequence Override
ESOC	European Space Operations Center
ESOW	Engineering Statement of Work
ESP	Engine Service Platforms
ESP	Experiment Sensing Platform
ESP	Electroshock Protection
ESPS	Experiment Segment Pallet Simulator
ESR	Effective Sunrise
ESR	Engineering Support Request
ESRIN	European Space Research Institute
ESRO	European Space Research Organization
ESRO	European Space Research Organization
ESS	Environmental Support System
ESS	Essential
ESS	Experiment Subsystem Simulator
ESS	Effective Sunset
ESS	Equipment support section
ESS	Essential
ESSA	Environmental Sciences Services Administration
EST	Eastern Standard Time
EST	Estimate(d)
ESTA	Electronic System Test Equipment
ESTA	Escape System Test Article
ESTEC	European Space Research and Technology Center
ESTEC	European Space Technology Center
ESTL	Electronic Systems Test Laboratory
ESV	Emergency Shutoff Valve
ESVS	Escape System Ventilation System
ESVS	Escape Suit Ventilation System
ESVS	Escape suit ventilation system
ESW	Engine Status Word
ET	Edge Thickness
ET	Elevated Temperature
ET	Event Timer
ET	External Tank
ET	Elapsed Time
ET	External tank
ET-SEP	External Tank Separation
ETA	Environmental Test Article
ETA	Estimated Time of Arrival
ETA	Estimated Time to Acquisition
ETA	Explosive Transfer Assembly
ETA	External Tank Attachment
ETB	Equipment Transfer Bag
ETC	Estimate to Completion
ETC	"Greenbelt, Maryland (STDN Site)"
ETC	Earth Terrain Camera
ETCO	Equipment Transfer/Change Order
ETD	Electrical Terminal Distributor
ETD	Estimated Turnover Date
ETD	External Tank Door
ETE	End-to-End
ETI	Elapsed Time Indicator
ETLOW	External Tank Lift-Off Weight
ETM	ElaPsed Time Meter
ETP	Equipment Test Plan
ETR	Eastern Test Range (ESME preferred)
ETR	Eastern test range
ETROD	Eastern Test Range Operations Directive
ETS	Energy Transfer System
ETS	External Tank System (Subsystem)
ETS	Electrical Test Set
ETSS	External Tank Separation Subsystem
ETVA	External Tank Vent Arm
EU	Electronic Unit
EU	Engineering Units
EU	Experimental Unit
EUROCOMSATE	European Consortium Communications Satellite
EUV	Extreme Ultraviolet
EUVE	Extreme Ultraviolet Explorer
EV	Electron Volts
EV	Expendable Vehicles
EV	Extravehicular
EVA	Earned Value Analysis
EVA	Extravehicular Activity
EVA	Extravehicular activity
EVAL	Earth Viewing Applications Laboratory
EVAL	"Evaluate, Evaluation"
EVAP	Evaporator
EVATA	Extravehicular Activity Translational Aid
EVC	Extravehicular Communications
EVCON	Events Control (Subsystem)
EVCS	Extravehicular Communications System
EVCU	Extravehicular Communications Umbilical
EVD	External Visual Display
EVF	Equipment Visibility File
EVLSS	Extravehicular Life Support System
EVM	Earth Viewing Module
EVMU	Extra Vehicular Mobility Unit
EVO	Engineering Verification Order
EVS	Equipment VisibilitY System
EVS	Extravehicular Suit
EVSC	Extravehicular Suit Communications
EVSS	Extravehicular Space Suit
EVSU	Extravehicular Space Unit
EVT	Engineering Verification Test
EVT	Extravehicular Transfer
EVVA	Extravehicular Visor Assembly
EWA	Estimated Warehouse Arrival
EWE	Emergency Window Escape
EWO	Engineering Work Order
EWR	Engineering Work Request
EX	Executive Management Office (KSC Directorate)
EXC	Experiment Computer
EXCH	Exchange
EXEC	Execute
EXH	Exhaust
EXO	Experiment Operator (in Spacelab)
EXP	Exposure
EXP	Expand
EXP	Experiment
EXPEN	Expendable
EXT	Experiment Terminal (Operator Console on Spacelab)
EXT	Extension
EXT	External
EXTD	Extend
EXTER	External
EXTGH	Extinguish
El	End Item
El	Engineering Instruction
El	Entry Interface
El	Environmental Impact
El	Electronic Interface
El	Electromagnetic Interference
[F]
F	Forward
F	Fahrenheit
F	Failure
F	Farad (SI Unit of Capacitance)
F	Female
F	Front
F   LCA	Forward Load Control Assembly
F&E	Facility and Envii-onment
F/0	Fuel/Oxidizer Ratio
F/A	Failure Analysis
F/A	Fuel-Air
F/C	Fit  Check
F/C	Flight Controller
F/C	Fuel Cells
F/D	Fill/Drain
F/E	Full/Empty
F/F	"Fill/Full, Full/Fill"
F/R	Flared Rudder
FA	Failure Analysis
FA	Final Approach
FA	Final Assembly
FA	Flight Aft
FA	Flight Critical Aft
FA	Fully Automatic
FA	Flight aft
FA/COSI	Final Assembly and Closeout System Installation
FAA	False Alarm Avoidance
FAA	Federal Aviation Administration
FAA	Federal Aviation Agency
FAB	"Fabricate, Fabrication"
FAC	Facility
FACI	First Article Configuration Inspection
FACO	Fabrication and Acceptance Checkout
FACO	Factory Acceptance Checkout
FACO	Factory Assembly and Checkout
FACO	Final Assembly Checkout
FACS	Facilities Control
FACS	Finance and Control System
FACT	Flexible Automatic Circuit Tester
FAD	Final Approach Display
FAF	First Aerodynamic Flight
FAIR	"Fabrication, Assenibly, and Inspection Record"
FAL	First Approach and Landing (Test)
FAM	Familiarization
FAMOS	Flight Acceleration Monitor Only System
FAO	Flight Activities Officer
FAP	Final Approach Plane
FAR	Failure Analysis Report
FAR	Federal Aviation Regulation
FAR	Final Acceptance Review
FAR	Flight Acceptance Review
FASCOS	Flight Acceleration Safety Cutoff System
FAT	Flight Attitude Table
FAWG	Flight Assignment Working Group
FAX	Facsimile Transmission
FB	Feedback
FB	Final Braking
FBAS	Fixed Base Aft Station
FBC	Fluidized-Bed Combustion
FBCS	Fixed Base Crew Station (SMS)
FBS	Firefighters Breathing System
FBV	Field Base Visit
FBV	Fuel Bleed Valve
FC	Fit Check
FC	Flight Computer
FC	Flight Control
FC	Flight Critical
FC	Fuel Cell
FC	Flight control
FC	Flight critical
FC	Fuel cell
FCA	Fluids Control Assembly
FCA	Frequency Control Analysis
FCA	Functional ComPatibility Analysis
FCA	Functional Configuration Audit
FCA	Forward controller assembly
FCAF	Flight Crew Accommodations Facility
FCAP	Flight Control Applications Program
FCC	Federal Communications Commission
FCC	Flat Conductor Cable
FCC	Flight Control Computer
FCC	Flight Crew Compartment
FCCP	Firm Contract Cost ProPosal
FCD	Flight Control Division (JSC)
FCDB	Flight Control Data Bus
FCE	Flight Control Equipment
FCE	Flight Crew Equipment
FCEF	Flight Crew Equipment Facility
FCEI	Facility Contractor End Item
FCF	First Captive Flight
FCF	Flight Critical Forward
FCF	Functional Check Flight
FCFM	Flight Combustion Facility Monitor
FCH	Flight Controllers Handbook
FCH  L	Flight Control Hydraulics Laboratory
FCI	Flight Control Indicator
FCI	Functional Configuration Identification
FCIM	Flight Control Interface Module
FCIP	Flight Cargo Implementation Plan
FCIT	First Computer Interface Tester
FCL	Freon Coolant Loop
FCL	Freon Coolant Line
FCL	Freon coolant loop
FCMU	Foot Controlled Maneuvering Unit
FCN	Function
FCO	Final Checkout
FCO	Functional Checkout
FCOH	Flight Controllers Operational Handbook
FCOS	Flight Computer Operating System (Orbiter)
FCOS	Flight Control Operational Software
FCOS	Flight Control Operating System
FCOS	Flight control operational software
FCOS	Flight computer operating system
FCP	Firm Cost Proposal
FCP	Failure Correction Panel
FCP	Fuel Cell Power (Plant)
FCP	Flight Correction Proposal
FCP	Fuel cell power plant
FCPS	Fuel Cell Power System (Subsystem)
FCR	Final Configuration Review
FCR	Flight Configuration Review
FCR	Flight Control Room
FCR	Flight Control Room
FCRA	Fecal Collection Receptacle Assembly
FCRT	Flight Display CRT
FCS	Fecal Containment System
FCS	Flight Control System (Subsystem)
FCS	Flight Crew System
FCS	Federal Communications System
FCS	Flight control system
FCSM	Flight Combustion Stability Monitor
FCSS	Fuel Cell Servicing System
FCT	Flight Control Team
FCT	Fuel Cell Test
FCT	Flight Crew Trainer
FCTB	Flight Crew Training Building
FCTF	Fuel Cell Test Facility
FCTS	Flight Crew Trainer Simulator
FCU	Fluid Checkout Unit
FCW	Format Control Words
FD	Fault Detection
FD	Flight Day
FD	Flight Deck
FD	Flight Director
FD	Freeze Dried
FD	Feed
FD	FunCtion Designator
FD WMR	Food Warmer
FDA	Fault Detection and Annunciation
FDA	Flight Deck Assembly (FDF)
FDAI	Flight Director Attitude Indicator
FDB	Fahrenheit Dry Bulb
FDDB	Function Designator Data Base
FDF	Flight Data File
FDF	Flight data file
FDI	Fault Detection and Identification
FDI	Fault Detection and Isolation
FDI	Failure Detector Indicator
FDIIR	Recompensation
FDIIR	"FaLilt Detection, Isolation, Identification, and"
FDIR	Recovery/Recognition
FDIR	Fault Detection identification/Isolation and
FDL	Flight Director Loop
FDLN	Feedline
FDM	Flight Data Manager
FDM	Frequency Data Multiplexer
FDM	Frequency Division Multiplexing
FDM	Frequency division multiplexer
FDO	Flight Dynamics Officer
FDO	Fee Determination Official
FDOR	Flight Design Operations Review
FDR	Final Design Review
FDR	Flight Data Recorder
FDR	Functional Design Review
FDRI	Flight Director Rate Indicator
FDS	Flight Design System
FDS	Flight Dynamics Simulator
FDS	Flight Dynamics Software/System
FDS	Fluid Distribution System
FDS	Functional Design Specifications
FDS	Flight Design and Scheduling
FDSC	Flight Dynamics Situation Complex
FDSC	Flight Dynamics Simulation Complex
FDU	Fluid Distribution Unit
FDX	Full Duplex
FEA	Failure Effects Analysis
FEAT	Final Engineering Acceptance Test
FEB	Forward Equipment Bay
FEC	Field Engineering Change
FEC	Forward Events Controller
FED	Flight Events Demonstration
FEDP	Facility and Equipment Design Plan
FEID	Flight Equipment Interface Device
FEID	Functional Engineering Interface Device
FEM	Finite Element Method
FEMCPL	Facilities and Envir- Measurement Comp.  Parts List
FEP	Floral Ethel Propane
FEP	Fluorinated Ethylene Propylene
FEP	Front End Processor
FERD	Facility and Equipment Requirements Document
FES	Flight Element Set
FES	Flash Evaporator System
FES	Flash evaporator system
FESL	Failure Effects Summary List
FET	Field Effect Transistor
FET	Flight Elapsed Time
FEWG	Flight Evaluation Working Group
FF	Flip Flop
FF	Free Flight
FF	Flight Forward
FF	Flight forward
FFBD	Functional Flow Block Diagram
FFC	Final Flight Certification
FFD	Fixed   Format   Display
FFD	Functional Flow Diagram
FFM	Free-Flying (Experiment) Module
FFP	Firmed Fixed Price
FFTO	Free-Flying Teleoperator
FH	Flex Hose
FHC	Flight Half Coupling
FHD	Fixed Head Disk
FHF	First Horizontal  Flight
FHO	Failed Handover
FHP	Fuel High Pressure
FHS	Forward Heat Shield
FI	Flight   Instrumentation
FI	Formal Inspection
FIAR	Failure Investigation Action Report
FID	Failure Identification
FID	Flight Implementation Directive
FIDO	Flight Dynamics  Officer
FIE	Flight Instrumentation Engineer
FIFO	First in-First out (High Speed Data Buffers)
FIG	Figure
FIIG	Federal Item Identification Guide
FIL	Filament
FILE	Future Identification and Location Experiment
FIO	Furnished and installed by Others
FIR	Fuel Indicating  Reading
FIS	Facility Interface Sheets
FIT	Fault Isolation Test
FITH	Fire-in-the-Hole
FIV	Fuel Isolation Valve
FKB	Flight Display  Keyboard
FL	Fail
FL	Feed Lines
FL	Flowline
FL	Forward link
FL MECH	Fluid Mechanical
FLAP	Flight Application Software
FLC	Federal Library Committee
FLC	Forward Load Control
FLCA	Forward load controller assembly
FLD	Field
FLEX	Flexible
FLG	Flag
FLG	Flange
FLLK	Frustum Lifting Lug Kit
FLN	Fuel Line
FLOT	Flotation
FLP	Flap
FLPS	Flight Load Preparation System
FLR	Flare
FLR	Failure
FLS	Flight Surgeon
FLSC	Flexible Linear Shaped Charge
FLT	Flight
FLT	Floating
FLTR	Filter
FLTSATCOM	Fleet Satellite Communications
FLUOR	Fluorescent
FLW	Fellows (TACAN Station)
FM	Frequency Modulation (Modulated)
FM	Flight Model
FM	"Frequency modulation, frequency modulated"
FM/FM	Frequency Modulation/Frequency Multiplexing
FM/PM	Frequency Modulation/Phase Modulation
FMA	Failure Mode Analysis
FMAHTS	Flight Manifest and Hardware Tracking System
FMANTS	Flight Manifest
FMC	Food Machinery Corporation
FMCF	First Manned Captive Flight
FMDM	Flex Multiplexer/Demultiplexer
FMEA	Failure Modes and Effects Analysis
FMEC	Forward Master Events Controller
FMECA	"Failure Mode, Effects, and Criticality Analysis"
FML	Fault Message Line
FML	Final Materials List
FMO	Flight Medical Officer
FMOF	First Manned Orbital Flight
FMOFEV	First Manned Orbital Flight with EVA
FMOFPL	First Manned Orbital Flight with Payload
FMR	Field Modification Request
FMR	Function Max Rate
FMS	Food Management System (Subsystem)
FMSP	Frequency Modulation Signal Processor
FMSP	FM signal processor
FMT	Flight    Management    Team
FMX	FM Transmitter
FND	Facility Need Date
FNL	Final
FNT	Failure  Notification  Telex
FO	Objective
FO	Fail Operational
FO	Fiber Optics
FO/FS	Fail-Operational/Fail-Safe
FOB	Flight  Operations  Building
FOB	Free on Board
FOC	Focus
FOC	Full Operational  Capability
FOD	Flight Operations Directorate (JSC)
FOE	Flight  Operations  Engineer
FOF	First Orbital Flight
FOF	First Operational Flight
FOF	Flight Operations Facilities
FOIH	Flight Operations Integration Handbook
FOM  R	Flight Operations management Room
FOP	Flight Operations Plan
FOP	Flight Operations Panel
FOP	Follow on Production
FOPG	Flight Operations Planning Group
FOPP	Follow on  Parts  Production
FOPS	Flight Operations Planning Schedule
FOR	Flight Operations Review
FOR	Force
FORTRAN	Formula Translation
FOS	Flight Operations Support
FOSDIC	Film Optical Sensing Device for Input to Computers
FOSO	Flight Operations Scheduling Officer
FOSP	Flight Operations Support Personnel
FOST	Flight Operations SUPPOrt Team
FOT	Flight Operations Team
FOV	First Orbital Vehicle
FOV	Field of View (Vision)
FP	Fuel Pressure
FP	Function Path
FP	Fine Pointing
FP	Fixed Point
FP	Flight Plan
FP	Freezing Point
FPB	Fuel Preburner
FPBOV	Fuel Preburner and Oxidizer Valve
FPC	Forward Power Controller
FPC	Fluids Pressure Control
FPCA	Forward Power Control Assembly
FPCA	Forward power controller assembly
FPE	Functional Program Element
FPEG	Fast Pulse Electron Gun
FPHB	Flight Procedures Handbook
FPIF	Fixed Price Incentive Fee
FPL	Full Power Level
FPL	Full Power Load
FPM	Folding Platform Mechanism
FPM	Feet per Minute
FPOV	Fuel Preburner Oxidizer Valve
FPP	Freon Pump Package
FPPR	Fixed Price with Price Revision
FPR	Flight Performance Reserve
FPS	Feet per Second
FPS2	Feet per second squared
FPS	Flight per Second
FPS	Forward Power Supply
FPS	Frames Per Second
FPU	Floating Point Unit
FPV	Flow Proportioning Valve
FQ	Flight Qualification
FQI	Flight Qualification Instrumentation
FQR	Flight Qualification Review
FQR	Flight Qualification Recorder
FQT	Formal Qualification Test
FR	Flight Rule
FR	Firing Room
FR	Frame
FRAGNET	Fragmented Network
FRB	Failure Review Board
FRC	"Flight Research Center, California"
FRCI	Fibrous refractory composite insulation
FRCS	Forward Reaction Control System (Subsystem)
FRCS	Forward reaction control system
FRD	Flight Requirements Document
FRE	Flight Related Element
FRE	Format Request Element
FREO DIV	FrequencY Divider
FREQ	Frequency
FREQ CONV	Frequency Converter
FRF	Flight Readiness Firing
FRFT	Flight Readiness Firing Test
FRJD	Forward Reaction Jet Driver
FRL	Fuselage Reference Line
FRL	Frame Reference Line
FRMT	Format
FRP	Fuselage Reference Plane
FRR	Flight Readiness Review
FRRID	Flight Readiness Review Item DescriPtion
FRRID	Flight Readiness Review Item DisPosition
FRSI	Felt Reusable Surface Insulation
FRSI	Flexible reusable surface insulation
FRT	FrequencY ResponseTest
FRT	Flight Readiness Test
FRT	Flight Readiness Training
FRZR	Freezer
FS	Functional Schematic
FS	Freon Servicer
FS	Fail-Safe
FS	Flight System
FS	Fault Summary
FS	Federal Specification
FS	Fire Suppression
FS	Fail to Sync
FS	Full Scale
FS	Fuselage Station
FSAA	Flight Simulator for Advanced Aircraft
FSC	Federal Stock Classification
FSCM	Federal Supply Code for Manufacturers
FSCP	Fire Sensor  Control  Panel
FSD	Flight Simulation Division (JSC)
FSD	Full Scale Development
FSE	Flight Simulation Engineer
FSF	First Static Firing
FSGS	Flare/Shallow  Glide  Slope
FSI	Final Systems  installation
FSIM	Functional Simulator
FSIWG	Flight System Interface Working Group
FSK	Frequency Shift Keyed (Keying)
FSL	Flight  Systems  Laboratory
FSL	Flight Simulation Laboratory
FSLO	First Spacelab Payload
FSLT	First Sea Level Test
FSM	Fuel Supply Module
FSN	Federal Stock Number
FSO	Functional Supplementary Objective
FSOH	Flight Support Operations Handbook
FSP	Fault Summary Page
FSR	Final System Release
FSR	Flight Specific Requirements
FSRR	Flight System Readiness Review
FSRR	Flight Software Readiness Review
FSRS	Flight System Recording System
FSS	Field  Spectrometer  System
FSS	Flight Systems Simulator
FSS	Flight Support System
FSS	Fire Suppression System
FSS	Fixed Service Structure
FSS	Flight Support Station (for MMU)
FSS	Flight Support Structure
FSS	Fixed service structure
FSSR	Functional Subsystem Software Requirements
FSSR	Flight Systems Software Requirements
FSTE	Factory Special Test Equipment
FSU	Freon Servicing Unit
FSW	Flight Software
FT	Feet
FT	Flight Team
FT	Flight Test
FT	Formal Training
FT	Functional Test
FT/SEC	Feet per Second
FT&C	Formal Training and Certification
FTA	Flight Test Article
FTA	Fault  Tree  Analysis
FTA	Fatigue Test  Article
FTC	Flight Test Conductor
FTC	Florida Test Center (MDAC)
FTE	Factory Test EquiPment
FTE	Flight Test  Engineer
FTE	Forced Test End
FTIS	Flight Test Instrumentation System
FTO	Functional Test Objective
FTO	Flight Test Objective
FTOH	Flight Test Operations Handbook
FTOH	Flight Team Operations Handbook
FTP	Flight Test Procedure
FTP	Functional Test Program
FTP	Function Test Progress
FTP	Full Throttle Position
FTR	Functional Test Requirement
FTR	Flight Test Requirement
FTRD	Functional Test Requirements Document
FTRD	Flight Test Requirements Document
FTS	Federal Telecommunications System
FTS	Flight  Test  Station
FTS	Flight  Test   System
FTS	Functional Test Specifications
FU	Flight Unit
FU	Fuel
FUB	Forward Utility Bridge
FUD	First Use Date
FUNC	Function
FUNCT	Functional
FUO	Follow-up Output
FUS	Fuselage
FUS/LF	"Fuselage, Lower Forward"
FUS/UF	"Fuselage, Upper Forward"
FUSLG	Fuselage
FV	Front View
FV	FlighL Version
FVF	First Vertical Flight
FVMS	Fluid Volume Measurement System
FVV	Facility Verification Vehicle
FW	Flag Word
FW	Fuel Wasting
FWB	Fahrenheit  Wet  Bulb
FWD	Forward
FWD HT SHLD	Forward  Heat  Shield
FWG	Facility Working Group
FWW	"Food, Water, and Waste"
FWWM	"Food, Water, and Waste Management"
FWWMS	"Food, Water, and Waste Management System (Subsystem)"
FXD	Fixed
FY	Fiscal Year
Fl	Fault Identification
[G]
G	Giga (Billion)
G	Gravity
G	Units of Gravitational Force
G   IWG	Ground Interface Working Group
G   LOW	Gross Lift-Off Weight
G   LOW	Ground Lift-Off Weight
G  CCC	Ground Control Computer Center
G F&P	"Gases, Fluids, and Propellants"
G&A	General and Administrative
G&C	Guidance and Control
G&N	Guidance and Navigation
G&NGuidanc	and navigation
G&NS	Guidance and Navigation Subsystem
G-11	Gulfstream 11 (Shuttle Training Aircraft)
G-A	Ground-to-Air
G-G	Ground-to-Ground
G-MEM	General Memory
G-MEM	GPC-Memory
G-V	Gravity-Velocity
G/A	Ground-to-Air
G/E	Graphite Epoxy
G/G	Ground-to-Ground
G/S	Guided steering
G/T	Antenna Gain-to-Noise Temperature Ratio
G02      Ga	G02      Gaseous Oxygen
GA	Gage
GA	General Assembly
GA	Glide Angle
GA	Gyro Assembly
GA&CS	Ground Acquisition and Command Station
GAC	Ground Attitude Control
GAC	Grumman Aerospace Corporation
GACU	Ground Air Conditioning Unit
GACU	Ground Avionics Cooling Unit
GAIN	Graphic Aids for investigating Networks
GAM	Gamma
GAO	General Accounting Office
GAP	GOAL Automatic Procedure
GAPL	Group Assembly Parts List
GAS	Get-Away Special
GASPI	Guidance Attitude Space Position Indicator
GATP	Ground Acceptance/Article Test Procedure
GATT	Gate Assisted Turnoff Thyristor
GBI	Grand  Bahama  Island
GBL	Government Bill of Lading
GBR	Glass Bead Rating
GBS	Ground  Based  Software
GC	Gigacycles (1000 Megacycles)
GC	Ground Control
GC	Guidance Control
GC	Gyrocompassing
GCA	Ground Controlled Approach
GCC	Ground Communications Coordinator
GCC	Ground  Control  Center
GCCO	Ground Control Checkout
GCD	"Gyrc)-Compass, Desired Cluster Orientation"
GCDC	Ground Checkout Display and Control
GCDCS	Ground Checkout Display and Control System
GCE	Ground Checkout Equipment
GCF	Ground Communications Facility
GCHX	Ground Cooling Heat Exchanger
GCI	Ground Controlled Interception
GCIL	Ground Control Interface Logic
GCIL	Ground command interface logic
GCILC	Ground Command Interface Logic Controller
GCILU	Ground Control Interface Logic Unit
GCL	Ground  Coolant  Loop
GCL	Ground Control  Landing
GCN	Ground Control   Network
GCN	Ground Communications Network (A/G Worldwide Net)
GCO	Ground Checkout
GCOS	General Computer Operational System
GCOS	Ground Computer Operating System
GCR	Ground Controlled  Radar
GCS	Guidance Cutoff Signal
GCS	Ground Communications System
GCTS	Gas Component Test Stand
GCTS	Ground Communication(s) Tracking System
GCU	Gyro Coupling Unit
GCU	General Control Unit
GCU	Generator Control Unit
GCU	Ground Cooling Unit
GCV	Gaseous Oxygen Control Valve
GD	Guard
GDA	Gimbal Drive Actuator/Assembly
GDBS	Generalized Data Base System
GDC	General Dynamics  Convair
GDC	Gyro Display Coupler
GDP	Generalized Documentation Processor
GDS	"Goldstone, California (STDN)"
GDS	GNC Dynamic Simulator
GDSD	Ground Data SYstems Division
GDSM	Ground Data Systems Manager
GDSO	Ground Data Systems Officer
GDSSR	GDSD Staff  Support  Room
GDX	"Goldstone, CA (STDN Site, 2nd Antenna)"
GE	General Electric
GECALL	GCOS Program Element Name
GEDAC	General Electric Detection and Automatic Correction
GEN	"Generate, Generator"
GENOPAUSE	Geodetic Satellite in Polar Geosynchronous Orbit
GEOD	Geodetic
GEOSEPS	General Summary Edit Program
GEOSEPS	Geosynchronous Solar Electric Propulsion Stage
GERT	Graphical Evaluation and Review Technique
GES	Goddard Experiment SuPport System
GESYOT	GCOS Program Element Name
GET	Ground Elapsed Time
GETI	Ground Elapsed Time of Ignition
GETIL	Ground Elapsed Time of Landing (for TIG of
GETIL	Abort Burn)
GETS	Ground Equipment Test Sets
GF	Gage Factor
GFAE	Government Furnished Aircraft Equipment
GFAE	Government Furnished Aerospace Equipment
GFD	Government Furnished Data
GFE	Government Furnished Equipment
GFM	Government Furnished Material
GFP	Government Furnished Property
GFRP	Glass Fiber Reinforced Plastics
GFRP	Graphite Fiber Reinforced Plastics
GFS	Government Furnished Software
GFY	Government Fiscal Year
GG	Gravity Gradient
GG	Gas Generator
GH2	Gaseous Hydrogen
GH2	Gaseous hydrogen
GHA	Greenwich  Hour  Angle
GHA	General Housekeeping Area
GHC	Ground  Half  Coupling
GHX	Ground Heat Exchanger
GHe	Gaseous Helium
GHz	Gigahertz
GIA	GPC Interface  Adapter
GIDEP	Government-industry Data Exchange Program
GIE	Ground Instrumentation Equipment
GIM	Generalized Information Management
GIRD	Ground Integration Requirements Document
GITG	Ground Interface Technical Group
GLAADS	Gun Low Altitude Air Defense System
GLC	Generator Line Contractor
GLD	Glide Slope
GLL	Galileo
GLP	Goal Language Processor
GLRSHLD	Glare Shield
GLS	Ground Launch Sequence (Sequencer)
GLY	Water-Glycol Mixture
GLY	Glycol
GM	Gaseous Mixture
GM	Geometric Mean
GMAL	General Electric Macro Assembly Language
GMBL	Gimbal
GMCL	Ground Measurements Command List
GMIL     Sp	GMIL     Spaceffight Tracking and Data Network (STDN)
GML      Ge	GML      General Measurement Loop
GMMC     Gr	GMMC     Ground Master Measurements List
GMN      Go	GMN      Gorman (TACAN Station)
GMT	Greenwich Mean Time
GMT      Gr	GMT      Greenwich  Mean   Time
GN       Ga	GN       Gain
GN&C	"Guidance, navigation and control"
GN&C     Gu	"GN&C     Guidance, Navigation, and Control"
GN2	Gaseous nitrogen
GN2      Ga	GN2      Gaseous Nitrogen
GNC      Gu	GNC      Guidance and Navigation COmPuter
GNCFTS   GN	GNCFTS   GN&C Flight Test Station
GNCIS    GN	GNCIS    GN&C Integration Simulator
GNCS     Gu	GNCS     Guidance and Navi-oation Control System
GNCTS    GN	GNCTS    GN&C Test Station
GND      Gr	GND      Ground
GND C/0  Gr	GND C/0  Ground Checkout
GNP      Gr	GNP      Gross National Product
GO       Ge	GO       General Order
GO2	Gaseous oxygen
GOAL     Gr	GOAL     Ground Operations Aerospace Language
GOC      Gr	GOC      Ground Operations Coordinator
GOCA     Gr	GOCA     Ground Operations Control Area
GOE      Gr	GOE      Ground Operating EquiPMent
GOES     Ge	GOES     Geostationary Operational Environment Satellite
GOM      KS	GOM      KSC Ground Operations Manager  at  DFRC  or  WSMR
GOMMS    Gr	GOMMS    Ground Operations and Material Management  System
GOMS     Gr	GOMS     Ground Operations Management System
GOP      Gr	GOP      Ground Operations Panel
GOPG     Gr	GOPG     Ground Operations Planning Group
GOR      Gr	GOR      Ground Operations Review
GORP     Gr	GORP     Ground Operations Requirements Plan
GORS     Gr	GORS     Ground Observer RF System
GOSS     Gr	GOSS     Ground Operations Support System
GOWG     Gr	GOWG     Ground Operations Working Group
GOX      Ga	"GOX      Gaseous Oxygen (GO,)"
GP	Group
GP	General Purpose
GP       Ge	GP       General Publication (RSC)
GPA	General Purpose Amplifier
GPAS	General PurPose Airborne Simulator
GPBIM	General Purpose Buffer interface Module
GPC	General Purpose Computer
GPC	Gel Permeation Chromatograph
GPC	General-purpose computer
GPCB	GOAL Program Control Block
GPD	Gimbal Position Display
GPH	Gallons per Hour
GPI	Gimbal Position Indicator
GPI	Ground Position Indicator
GPL	General Purpose Laboratory
GPL	Goal Processing Language
GPM	Gallons per Minute
GPME	General Purpose Mission Equipment
GPRN	GOAL Test Procedure Release Notice
GPS	Global Positioning System
GPS	Gallons per Second
GPS	General Processing Subsystem
GPS	Global Positioning Satellite
GPS	Ground Power Supply
GPS	Ground Processing Simulation
GPSS	General Purpose System Simulator
GPTE	General Purpose Test Equipment
GPU	Ground Power Unit
GPUR	GOAL Test Procedure Update Request
GR	Ground R@le
GRE	Gamma Ray Explorer
GRID	Graphic Retrieval and Information Display
GRN	Green
GRO	Gamma Ray Observatory
GRTLS	Glide Return to Launch Site
GRTLS	Glide Return to Landing Site
GS	Ground Station
GS	Ground System
GS	Ground Speed
GS	Gas Servicer
GS	Glide Slope
GS	Glide slope
GSA	General Services Administration
GSAT	General Satellite (STS)
GSCU	Ground Service Cooling Unit
GSDL	Ground Software Development Laboratory
GSE	Ground Servicing Equipment
GSE	Ground Support Equipment
GSE	Ground support equipment
GSEL	Ground Support Equipment List
GSFC	"Goddard Space Flight Center (Greenbelt, MD)"
GSFC	Goddard Space Flight Center
GSI	Government Source Inspection
GSI	Glide Slope Indicator
GSI	Glide slope indicator
GSIU	Ground Standard Interface Unit
GSO	Ground Support Office
GSO	Ground Support Operations
GSO	Ground Systems Operations
GSS	Ground Support System
GSS	Ground Support Software
GSSA	Ground Support Systems Activation
GSSC	Ground Support Systems Contractor
GSSC	Ground Support Simulation Computer
GSSI	Ground Support System Integration
GST	Ground System Test
GSTAR	General Satellite (ELV)
GSTDN	Ground Spacecraft Tracking and Data Network
GSTDN	Ground Space Flight Tracking and Data Network
GSTDN	Ground space flight tracking and data network
GSTF	Ground Systems Test Flow
GSU	Gas Servicer Unit
GSVP	Ground Support Verification Plan
GT	Gyro Torque
GT	Ground Test
GT	Greater Than
GT	Ground Team
GT&A	Ground Test and Acceptance
GTA	Ground Test Access
GTA	Ground Test Article
GTA	Gas Tungsten Arc
GTA	Ground Torquing Assembly
GTC	Glycol Trim Console
GTC	Ground Test Conductor
GTCU	Ground Thermal Conditioning Unit
GTI	Ground Test Instrumentation
GTI	Grand Turk Island
GTM	Ground Team Manager
GTM	Ground Test Motor
GTS	General Test Support
GTS	GN&C Test Station
GTS	GNS Test Station
GTU	Glycol Trim Unit
GUCP	Ground Umbilical Carrier Plate
GUID	Guidance
GUIDO	Guidance Officer
GUL	GSE Utilization List
GUSB	Guided Unified S-Band
GVA	GOX Vent Arm
GVO	Gaviota (TACAN Station)
GVT	Ground Vibration Test
GVTA	Ground Vibration Test Article
GW	Gross Weight
GWA	General Work Area
GWM	Guam (STDN)
GWT	Ground Winds Tower
GYM	"Guaymas, Mexico (Remote Site)"
GYRO	Gyroscope
GYROA	Gyro A
GYROCOMP	Gyrocompassing
Geosynchron	Geosynchronous Operational Environmental Satellite
Ground Oper	Ground Operations Review Panel
[H]
H        Al	H        AlHazardous (Task Classification)
H        Al	H        Altitude
H        Al	H        AlAltitude Rate
H        Al	H        AlHead
H        Al	H        AlHenry (Si Unit)
H        Al	H        AlHigh
H        Al	H        AlHorizontal
H        Al	H        AlHot
H        Al	H        AlHours
H        Al	H        AlMomentum
H  2	Hydrogen
H  20	Water
H  M	Hinge Mount
H /'E	Heat Exchanger
H 1ST	History
H EPA	High Efficiency Particle Air (Filter)
H EPA	High Efficiency Particle Accumulator
H LTL	High Level Test Language
H-CITE	Horizontal-Cargo Integration Test Equipment
H/L	Hardline
H/O	Handover
H/S	Heat Shield
H/S IR	Hardware/Software Integration Review
H/T	Heat Treat
H/W	Hardware
H2	Hydrogen
HA	Hazard Analysis
HA	Apogee Altitude
HA	High Altitude
HAA	High Altitude Abort
HAB	Habitation
HAC	Heading Alignment Cylinder
HAC	Heading Alignment Circle
HAC	Heading Alignment Cone
HAC	Heading alignment cylinder
HAD	Heat Actuated Device
HAFB	Holloman Air Force Base
HAINS	High-accuracy inertial navigation system
HAK	Horizontal Access Kit
HAL	High Order Assembly Language
HAL	High Order Articulated Language
HAL	Houston Aerospace Language
HAL/S	High Order Programming Language for Spacelab Usage
HAL/S	High Order Assembly Language/Shuttle
HAL/S	Computer
HAL/S	High Order Assembly Language for Shuttle Flight
HAL/S	High-order assembly language/ shuttle
HAM	Height Adjustment Maneuver
HAP	Hardware Allocation Panel
HAS	Hydrogen Actuation System
HAS	Hydraulic Actuation System
HAS	Holddown Alignment Support
HAST	High Altitude Supersonic Target
HAW	Hawaii (STDN)
HB	High Bay
HB	Handbook
HBR	High Bit Rate
HBT	Heflex Bio-Engineering Test
HBW	Hot Bridge Wire
HC	Hybrid Computer
HC	Head Count
HC	Hand Controller
HCED	Hand Controller Engage Driver
HCF	High Cycle Fatigue
HCF	HIM Configuration File
HCL	Horizontal Centerline
HCM	Hard Copy Module
HCMM	Heat Capacity Mapping Mission
HCR	High Cross Range
HCSI	"Hughes Communications Services, Inc."
HCSL	Hybrid Computation and Simulation Laboratory
HCU	Hydraulic Charging Unit
HCV	Hydrogen Check Valve
HD	Hoiddown
HD	Horizontal Drain
HD	Hydrogen Drain
HD	Highly Desirable
HD	Heavy Duty
HDA	Housekeeping Data Acquisition
HDC	HYbrid Device Controller
HDC	Hasselblad Data Camera
HDDR	High-Density Digital Recorder
HDG	Heading
HDP	Holddown Post
HDQ	Headquarters
HDR	High Data Rate
HDR	High data rate
HDRA	High Data Rate Assembly
HDRM	High Data Rate Multiplexer
HDRR	High Data Rate Recorder
HDRR	High-data-rate recorder
HDRSS	High Data Rate Storage System
HDS	Hardware DescriPtion Sheet
HDST	Headset
HDW	Hardware
HDWE	Hardware
HE	High Energy Astrophysics
HE	Heat Exchange (Exchanger)
HEAO	High Energy Astronomy Observatory
HEAP	High Energy Aim Point
HECV	Helium Check Valve
HEG	Helium Gage
HEGV	Helium Gage Valve
HEM	Hitchhike Experiment Module
HEMI	Hemispherical (S-Band Antenna)
HEMV	Helium Manual Valve
HEO	High Energy Orbit
HER	HIM EquiPment Rack
HERSCP	Hazardous Exposure Reduction and Safety Criteria Plan
HESS	High Energy Squib Simulator
HETM	Hybrid Engineering Test Model
HEX	Heat Exchanger
HEX	Hexadecimal
HEX	Hexagon
HF	High Frequency
HF	Horizontal Flight
HF	Hot Firing
HF	Hydrogen Fill
HF	Hyperfiltration
HF	Hard Failure
HFA	High Frequency Accelerometer
HFC	Heat Flow and Convection
HFC	Hydraulic Flight Control
HFCT	Hydraulic Flight Control Test
HFCV	Helium Flow Control Valve
HFDS	Hydrogen Fluid Distribution System
HFE	High Frequency Executive
HFM	Hollow Fiber Membrane
HFMU	High Fidelity Mockup
HFO	High Frequency oscillator
HFS	Horizontal Flight Simulator
HFT	Horizontal Flight Test
HFTF	Horizontal Flight Test Facility
HFTS	Horizontal Flight Test Simulator
HFX	High Frequency Transceiver
HG	High Gain
HGA	High Gain Antenna
HGDS	Hazardous Gas Detection System
HGM	Hot-Gas Manifold
HGR	Hangar
HGR&SPTFAC	Hangar and Support Facility
HGS	Hydrogen Gas Saver
HGV	Hydrogen Gas Valve
HGVT	Horizontal Ground Vibration Test
HHC	Hammer Head Crane
HHMU	Hand Held Maneuvering Unit
HI	High
HI	"Honeywell, Inc."
HIC	"Hickam Air Force Base, Hawaii (Deorb OPT site)"
HID	Hardware Interface Device
HID	HIM Interface Distributor
HIM	Hardware Interface Module
HIP	Hardware Interface Program
HIP	Hardware interface program
HIPC	High Chamber Pressure
HIPO	Hierarchical Input/Process Output
HIPO	Hierarchy Plus InPut/Process/Output
HISAM	Hardware Initiated Standalone Memory
HITS	High Rate Multiplexer InPut/Output Test System
HIU	Headset Interface Unit
HIU	Headset interface unit
HIV	Helium Isolation Valve
HK	Housekeeping
HL	High Level
HL	Hardline
HL	Heel Line
HL	Hydrogen Line
HL	Hinge Line
HLAL	High Level Assembler Language
HLD	Hold
HLDS	Hydrogen Leak Detection System
HLMT	Hel met
HMA	Hypergot Maintenance Area
HMC	Hypergolic Maintenance and Checkout
HMC	Hybrid Microcircuit
HMCC	Hypergolic Maintenance and Checkout Cell
HMCF	Hypergolic Maintenance and Checkout Facility
HMCF	Hypergolic Maintenance and Checkout Facility
HMD	Helmet-Mounted Display
HMF	Horizontal Mating Facility
HMF	Hypergot Maintenance Facility
HMP	Hydrozene Monopropeflant (RCS Propellant)
HMS	History Memory System
HMU	Hardware Mockup
HMV	Hydrogen Manual Valve
HNDLER	Handler
HNGR	Hangar
HO	Hydrogen-OxYgen
HOL	High Order Language
HOLC	High Order Language Computer
HORIZ	"Horizon, Horizontal"
HOS	High Order Software
HOSC	Huntsville Operations Support Center
HP	Handling Procedure
HP	Hewlett   Packard
HPF	Horizontal Processing Facility (O&C)
HPFT	High-pressure fuel turbopump
HPFTP	High Pressure Fuel Turbopump
HPG	High Pressure Gas
HPGS	High Pressure Gas System
HPI	High Performance insulation
HPOP	High Pressure Oxidizer Pump
HPOT	High Pressure Oxidizer Turbopump
HPOT	High-pressure oxidizer turbopump
HPOTP	High Pressure Oxidizer Turbopump
HPPF	Horizontal Payloads Processing Facility
HPR	Hydrogen Pressure Regulator
HPRV	Hydrogen Pressure Relief Valve
HPS	Hydraulic  Power  SYstem
HPT	High Pressure Test
HPU	Hydraulic Power Unit
HPU	Hydraulic power unit
HPV	High Pressure Valve
HQ	Headquarters (HDQ preferred)
HQR	Handling Qualities Rating (Cooper-Harper)
HR	Historical Record
HR	Hour
HRAA	High Rate Acquisition Assembly
HRC	Hasselblad Reflex Camera
HRD	High Rate Dosimeter
HRD	High-rate dosimeter
HRDA	High Rate  Data  Assembly
HRDM	High Rate Demultiplexer
HRDR	High Rate Digital Recorder
HRDS	High Rate Data Station
HRIR	High Resolution Infrared Radiometer
HRL	Horizontal Reference Line
HRM	High Rate Multiplexer
HRM	High-rate multiplexer
HRPS	Hazard Reduction Precedence Sequence
HRS	Hours
HRSI	High Temperature Reusable Surface Insulation
HRSI	High-temperature reusable surface insulation
HRT	High Resolution Tracker
HS	Horizon Sensor
HS	High Speed
HS	Heat Shield
HS-C	Hamilton Standard CO Absorbent Material
HSC	Hardware/Software Coordination
HSCU	Hydraulic SUPPly and Checkout Unit
HSD	HoriZontal Situation Display
HSD	High Speed Data
HSD	Hamilton Standard Division
HSDL	High Speed Data Line
HSF	Hypergot Servicing Facility
HSG	High Sustained Gs Acceleration
HSI	Horizontal Situation Indicator
HSI	Horizontal situation indicator
HSK	Horizontal Sling Kit
HSL	Hardware Simulation Laboratory
HSNG	Housing
HSP	Health Stabilization Program
HSP	High Speed Printer
HSR	Hardware Status Register
HSS	High Speed Reader
HSS	Hydraulic Subsystem Simulator
HSS	High Stress Strain
HSTP	Hard Stop
HSU	Helium Service Unit
HT	Heat Transfer
HT	Height
HT	High Technology
HTC	Hybrid Technol Ogy ComPuter
HTEXCH	Heat Exchanger
HTG	Heating
HTLL	High Test Level Language
HTM	High Temperature
HTPB	Hydroxyl Terminated Polybutadiene (Propellant)
HTR	HydroxYl Terminated Polybutyiene
HTR	Heater
HTS	Heat Transfer System
HTS	Heat Transport Section
HUD	Head Up Display
HUD	Head-up display
HUDE	Head Up Display Electronics
HUL	Hardware Utilization List
HUM	Humidity
HUT	Hard Upper Torso
HV	Hydrogen Vent
HV	High Voltage
HV	High Velocity
HVAC	"Heating, ventilating, and Air Conditioning"
HVDS	Hypergolic Vapor Detection System
HVPS	High Voltage Power Supply
HVR	Hover
HVSF	Honeywelf Verification Simulation Facility
HVSL	"Holidays, Vacation, and Sick Leave"
HW	Ha rd wa re
HW	Hotwire
HW	Headwind
HW/SW	Hardware/Software
HWWS	Hyperfiltration Wash Water Recovery System
HX	Heat Exchanger
HXIS	Hard X-ray Imaging Spectrometer
HYD	HYdraulics
HYD	Hydraulic Subsystem
HYG L	Hypergolic
HYPACE	Hybrid Programmable Attitude Control Electronics
He	Helium
Hg	Mercury
HiRAP	High-resolution accelerometer package
High Pressu	High Pressure
High Ratio	Multiplier
Hydrogen	Purge
Hydrogen Re	Hydrogen Relief
Hz	Hertz (Cycles per Second)
[I]
I     NTC/0	I     NTC/0Integrated Checkout
I    LAS	Instrument Landing Approach System
I    LSP	Integrated    Logistics Support Plan
I   DAC	Integrated Digital-Analog Converter
I   DAS	Integrated Data Acquisition System
I   DPS	Interface Digital  Processor
I   ECM	Induced Environment Contamination Monitor
I   ECO	Inboard Engine Cutoff
I   LCCS	Integrated Launch Control and Checkout System
I D&CA	Inverter Distribution and Control Assembly
I F	Intermediate Frequency
I-load	Initial-load
IACS	Inertial Attitude Control System
IAD	Interface Agreement Document
IAD	Interface Analysis Document
IAL	Immediate Action Letter
IAL	International Algebraic Language
IARS	Independent Air Revitalization System
IAS	Indicated Airspeed
IAS	Integrated Avionics System
IAS	Impact Assessment Sheet
IASS	Inverter/ATCS Support Structure
IAT	Integrated Avionics Test
IAV	Inventory Adjustment Voucher
IB	Inert Building
IB	Inboard
IB	Instruction Book
IBF	Internally Blown Flap
IBM	International Business Machines
IC	Intercomputer communication
IC/ES	Intercommunication/Emergency Station
ICA	Item Change Analysis
ICAO	International Civil Aviation Organization
ICAO	International Civil Aviation Organization
ICAR	Investigation and Corrective Action Report
ICB	Interim Change Bulletin
ICB	Interrupt Control Block
ICC	Intercomputer Channel
ICC	Intercomputer Communication
ICC	Interface Control Chart
ICC	Interstate Commerce Commission
ICCB	Integrated Change Control Board
ICCP	Interface Coordination and Control Procedure
ICD	Interface Control Document
ICDR	Incremental Critical Design Review
ICDU	Inertial CouPling Data Unit
ICE	Input Control Element
ICF	interface Control Function
ICG	In-Flight Coverall Garment
ICH	Interchanger
ICMT	Intercontract Material Transfer
ICP	ICS Control Program
ICR	Instruction Change Request
ICT	Influence Coefficient Tests
ICTC	interface Control Tool ing
ICWG	Interface Control Working Group
ID	Identification
IDA	Interface Display Assembly
IDB	lnsuit Drink Bag
IDC	IMBLMS Digital Computer
IDC	Integrated Displays and Controls
IDC	Interface   Document    Control
IDCA	Inverter Distribution and Control Assembly
IDD	Interface Definition Document(s)
IDE	Initial Design Evaluation
IDG	Integrated Drive Generator
IDI	Instrumentation   Data    Items
IDMM	Intermediate and Depot Maintenance Manual
IDO	Interdivisional   Operations
IDP	Integrated  Data   Processor
IDR	Intermediate   Design    Review
IDR	Interim   Discrepancy    Report
IDR	Initial Design Review
IDRD	Internal Data Requirement Description
IDRD	Information Definition Requirements Document
IDS	Interface Data Sheet
IDS	Item Description Sheet
IDSD	Institutional Data System Division (JSC)
IDSO	Interdivisional Sales  Order
IDT	I-load Data Tape
IDTA	Interdivisional Technical Agreement
IDU	Interface Demonstration Unit
IDWA	Interdivisional Work Authorization
IE	Industrial Engineering
IEA	Integrated Electronic Assembly
IEA	Integrated electronic assembly
IECS	Igloo Environment Control Subsystem
IED	Interacting Equipment Documents
IEF	Isoelectric Focusing
IEP	Instantaneous Effective Photo Cathodes
IF	Integration Facility
IFA	In-Flight   Analyses
IFASC	Integrated Functions Assessment Steering Committ
IFB	Invitation  for  Bid
IFM	In-Flight    Maintenance
IFO	Information Systems Office
IFOT	In-Flight Operations and Training
IFR	Instrument Flight Rules
IFRU	In-Flight Replacement Unit
IFT	In-Flight Test
IFTM	In-Flight Test Maintenance
IFTS	In-Flight Test System
IFU	Interface   Unit
IG	Igloo
IGA	Inner  Gimbal  Angle
IGAX	Inner Gimbal Axis
IGDS	Iodine Generating and Dispensing SYstem
IGM	Interactive Guidance Mode
IGN	"Ignition, Ignite"
IGOR	Intercept Ground OPtical Recorder
IGS	Inertial Guidance System
IGSE	In-Space Ground SUPPort Equipment
IGV	Inlet GUide Valve/Vanes
IH/SR	Integration Hardware and software Review
IHP	Indicated Horsepower
IHTV	Interim Hypersonics Test Vehicle
IHX	Interloop Heat Exchanger
IITCS	igloo Internal Thermal Control Section
ILA	Instrument Landing Approach
ILC	International Latex Corporation
ILC	Initial Launch Capability
ILLUM	Illuminate
ILP	Integrated    Logistics Panel
ILS	Integrated    Logistics System
ILS	Instrument      Landing System
ILS	Integrated    Logistics Support
ILS/LAR	Integrated    Logistics System and Logistics Assess
ILS/LAR	Review
ILSSE	Integrated Life Science Shuttle Experiments
IMBLMS	Integrated Medical Behavioral Laboratory Measuremen
IMBLMS	System
IMCP	Integrated Monitor and Control Panel
IMD	Intermediate
IMDB	Integrated Maintenance Data Base
IMF	Inventory   Master   File
IML	Inside Mold Line
IMP	Initial Memory Protection
IMPD	Impedance
IMPLS	Impulse
IMU	Inertial measurement unit
IN	Information Systems Directorate (KSC)
IN	Inlet
INSTR	Instruct
INSTR	"Instrument, Instrumentation"
INSTRUM	Instrumentation Subsystem
INT	Internal
INT	Integrated Test
INT	Intensity
INTASAT	Instituto Nacional De Technica Aeroespacial Satell
INTCHC:iR	Interchanger
INTCHG	Interchange
INTCP	Intercept
INTEGR	"Integrate, Integration"
INTELSAT	International Telecommunications Satellite Organiz
INTEROG	Interrogate
INTF	Interface
INTG	Integration
INTLK	Interlock
INTR	Interior
INTRG	Interrogate
INTRLVR	Interleaver
INTRPT	Interrupt
INTV	Interim Hypersonics Test Article
INTVL	Interval
INTVLM	Intervalometer
INV	Inverter
INV      MG	INV      MGT       Inventory Management
IOA	Input/Output or Assembly
IOA	input/Output Adapter
IOB	InPut/Output Box
IOB	InPut/Output Buffer
IOB	InPut/Output Buffer (if Bus
IOBPS	Input/Output Box and Peripheral Simulator
IOE	Input/Output Error Log Table
IOF	Initial Operational Flight
IOP	Input/output processor
IOPL	Integrated Open Problem List
IOQE	Input/Output C)ueue Element
IP	Inertial Processing
IP	InstruMentation PCM Data Bus
IP	Instrumentation Payload
IP	Identification of Position
IP	Intermediate Pressure
IP	Intermediate Pallet
IP	Igloo Pallet
IP	Instructor Pilot
IP	Impact Point
IP	Instrumentation/pulse code modulation master unit data bus
IPACS	Integrated Power and Attitude Control System
IPAD	Integrated Program for Aerospace Vehicle Design
IPB	Illustrated Parts Breakdown
IPB	Illuminated Push Button
IPC	Intermittent Positive Control
IPCL	Instrumentation Program and Component List
IPD	Information Processing Division
IPDR	Incremental Preliminary Design Review
IPE	Industrial Plant Equipment
IPF	IUS Processing Facility
IPL	Initial Program Load
IPL	Indentured Parts List
IPL	Initial program load
IPR	Interim Problem Report
IPS	ISA        Interim Stowage Assembly
IPS	Interconnecting Station
IPS	is         Installation Support
IPS	IRV        Isotope Reentry Vehicle
IPS	IRU        Inertial Reference Unit
IPS	ISD        Instructional Systems DeveloPment (USAF)
IPS	isc        Initial Software Configuration Map
IPS	IRIG       Inertial Rate Integrating Gyro
IPS	Inside Radius
IPS	I RTCM     Integrated Real-Time Contamination Monitor
IPS	Inner Roll Gimbal
IPS	Instrumentation Power Subsystem
IPS	IR SPECT   Infrared Spectrometer
IPS	I RAN)
IPS	IRANSAT    franian Government Communications Satellite (replace
IPS	IRR        InsPection Rejection Report
IPS	IRAN       Inspection and Repairs as Necessary
IPS	IPT        In-Plant Transporter
IPS	IR         Inclination of the Ascending Return
IPS	Initiating Reference Document
IPS	IPSL       Interface Problem Status Log
IPS	IRL        Initiating Reference Letter
IPS	Inverter Power Supply
IPS	IRIS       Italian Research Interim Stage
IPS	ips        International Pipe Standard
IPS	Interface Requirement List
IPS	Interface Problem Sheets
IPS	Interrange Instrumentation Group
IPS	IRD        Information Requirements Document
IPS	lglc)O Passive Thermal Control Section
IPS	IRME       Initiator Resistance Measuring Equipment
IPS	IRG        Inertial Rate Gyro
IPS	Infrared
IPS	IRIG-B     Interrange Instrumentation Group B
IPS	Inertial Reference Integrating Gyro
IPS	IRN        Interface Revision Notice
IPS	IPTCS      International Pipe Thread
IPS	Instrument Pointing System (Subsystem)
IPS	Integral Rocket Ramiet
IPS	International Rendezvous
IPS	IRAR       Internal Variable
IPS	Inches per Second
ISIL	Interim Support Items List
ISL	Inertial Systems Laboratory
ISL/LAR	Integrated Logistics System and Logistics Assessment
ISL/LAR	Review
ISLM	Integration Shop/Lab Manager
ISOL	"isolate, Isolation"
ISP	Instrumentation Support Plan
ISP	Integrated Support Plan
ISP	Initial Specific Impulse
ISPG	Institutional Support Planning GrouP
ISPM	International Solar Polar Mission
ISR	Initial System Release
ISSL	Initial Spares Support List
ISTA	Intertank Structural Test Assembly
ISTB	Integrated Subsystem Test Bed
ISTF	Integrated System Test Flow
IT	Installation Test
IT	Identification Transponder
ITA	integrated Test Area
ITA	Integrated test article
ITAP	Integrated Technical Assessment Panel
ITC	igloo Thermal Control
ITE	integration Test Equipment
ITE	Intersite Transportation Equipment
ITE	Instrumentation Test Equipment
ITI	Inspection and Test Instruction
ITL	"Integrate, Transfer, and Launch"
ITMG	Integrated Thermal/Micrometeoroid Garment
ITO	Integration and Test Order
ITRDS	Integrated Test Requirements Documents
ITS	Instrumentation Telemetry Station
ITS	Interim Teleprinter System
IU	Interface unit
IUA	Interface Unit AdaPter
IUA	Inertial Unit Assembly
IUE	Interface Unit Error Count Table
IUS	Inertial upper stage
IVA	Intravehicular Activity
IVA	Intravehicular activity
IVAR	internal Variable
IVBC	"Integrated Vehicle Baseline Config,ration"
IVE	Interface Verification EquiPr-nent
IVL	lntervatometer
IVT	Intervehicular Transfer
IWBS	Indirect Work Breakdown Structure
IWG	Investigator Working Group
IWG	Interface Working Group
Identificat	Identification Data
Inertial Gu	Inertial Guidance
Inner Gimba	Inner Gimbal
Inner Glide	Inner Glideslope
Insertion B	"Insertion Burn, OMSI"
Inside Diam	Inside Diameter
Installatio	Installation Notice Card
Installatio	Installation Notification Certificate
Instrument	Group SuPport Equipment
Instrument	Ground
Instrument	Checkout Equipment
Instrumenta	Instrumentation and Communication
Instrumenta	Instrumentation    Group
Interchange	Interchangeability and Replacement
Intercommun	Intercommunication  SYstem
Intercommun	Intercommunications
Interface	Tool
Interface C	Interface Control Drawing
Interface C	Interface Control Specification
Interface C	Interface COmPatibility Record
Interface C	Interface Control Unit
Interface D	Interface Document
Interface F	Interface Functional Analysis
Interpretiv	Interpretive Co '
Inventory C	Inventory Control Point
Inverter As	Inverter Assembly
Issuing Age	Issuing Agency
Iterative G	Iterative Guidance  Mode
[J]
J/M	Jettison  Motor
JAEIC	Joint Atomic Energy Intelligence Committee
JAN	Joint Army-Navy
JAS	Journal of Aerospace Science
JB	Junction Box
JCL	Job Control Language
JCP	Joint Power Conditions
JCT	Junction
JED	Julian Ephemeris Data
JETS	Joint Electronics Type (Designation) System
JETT	Jettison
JIR	Job Improvement Request
JOD	Joint Occupancy Data
JOD	Joint Occupancy Date
JOIP	Joint Operations Interface Procedure
JOP	Joint Operating Procedure
JOP	Jupiter Orbiter Probe-Galilee
JOR	Job Order Request
JOVIAL	Joules Own Version International Algebraic Language
JPC	Joint Power Condition
JPIC	Joint Program Integration Committee
JPL	Jet Propulsion Laboratory
JPL	Jet Propulsion Laboratory
JPOC	JSC Payload Operations Center
JRB	Joint Review Board
JSC	Johnson Space Center
JSL	Jet Select Logic
JSLWG	Joint Spacelab Working Group
JST	Joint Systems Test
JTA	Job Task Analysis
JTG	Joint Training Group
JURG	Joint Users Requirements Group
Jo	Job Order
Joule (SI U	Joule (SI Unit)
[K]
K	Kelvin
K	Kilocycle
K	One Thousand
K&H	Memory Time Value
K-APM	KSC Automated Payloads Plan/Requirement
K-APN	KSC Automated Payloads Notice
K-APPS	KSC Automated Payloads Project Specification
K-CITEM	KSC CITE Plan/Requirement
K-DODM	KSC DOD Plan/Requirement
K-DPM	KSC DOD Payloads Plan/Requirement
K-DPN	KSC DOD Payloads Notice
K-DPPS	KSC DOD Payloads Project Specification
K-IUSM	KSC IUS Plan/Requirement
K-IUSN	KSC [US Notice
K-IUSPS	KSC IUS Project Specification
K-MMSEM	KSC MMSE Plan/Requirement
K-MMSEN	KSC MMSE Notice
K-MMSEPS	KSC MMSE Project Specification
K-SLM	KSC Spacelab Plan/Requirement
K-SLN	KSC Spacelab Notice
K-SLPS	KSC Spacelab Project Specification
K-SM	KSC Shuttle Management Document
K-SPN	KSC Shuttle Project Notice
K-SPS	KSC Shuttle Project Specification
K-SSS	KSC Shuttle Project Station Set Specification
K-STSM	KSC STS Plan/Requirement
K-STSN	KSC STS Notice
K-STSPS	KSC STS Project Specification
K/S	Kick Stage
KAD	"Kadena AB, Ryuku Islands (Deorb OPT Site)"
KAPL	KSC Approved Parts List
KATS	Kennedy Avionics Test Set
KAU	Kilo Accounting Unit
KB	Keyboard
KB	Kilobit
KBAC	Kennedy Booster Assemblv Contractor
KBIM	Keyboard Interface Module
KBPS	Kilobits per Second
KBU	Keyboard unit
KCAS	Knots  Calibrated  Airspeed
KCRT	Keyboard Cathode RaY Tube
KCS	Keyboard Configuration Studies
KDMS	Kennedy Data Management SYstem(s)
KDN	Kinetically Designed Nozzle
KDT	Keyboard and  Display  Test
KDU	Keyboard and  DisPlay  Unit
KEAS	Knots  Equivalent  Airspeed
KHB	KSC Handbook
KIAS	Knc)ts Indicated Airspeed
KIP	Keyboard Input Processor
KIS	Kitting Instruction Sheet
KMI	KSC Management  Instruction
KMR	Kwaialein Missile Range
KMS	K-Words X Millions of Seconds
KN	Kitting Notice
KNO	KSC Notice
KOI	"Kano, Nigeria (Remote Site)"
KOM	KSC Organizational Manual
KOM	KSC Operation instruction
KOPS	Thousand of Operations per Second
KPD	KSC Program Directive
KPPS	KiloPulses per Second
KPRD	KSC Program Requirements Document
KPS	Kilometers Per Second
KSA	Ku-Band Single Access
KSA	Ku-band single access
KSC	John F. Kennedy Space Center
KSC	Kennedy Space Center
KSCAP	Kennedy Space Center Area Permit
KSSS	KSC Station Set Specification
KT	Kit
KT	Knots
KU	Keyboard Unit
KUSP	Ku-Band Signal Processor
KUSP	Ku-Band Single Processor
KUSP	Ku-band signal processor
KYBD	Keyboard
[L]
L	Launch
L	Left
L	Length
L	Level
L	Low
L	Lumen
L&C	Laboratory and Checkout
L&D	Landing and Deceleration
L&L	Launch and Landing
L&S	Logistics and SuPport
L&T	Laboratory and Test
L-BAND	S-Band  390 to 1550 MHz
L-L	Line-to-Line
L-P	Low Pressure
L/D	Length-to-Diameter
L/D	Lift-to-Drag (Ratio)
L/H	Local Horizontal
L/O	Lift-off
L/S	LLoad SYstem
L/S	Landing Site
L/T	Load Test
L02	Liquid Oxygen
LA	Launch Area
LA	Lanthanum
LA	Launch Abort
LA	Launch Azimuth
LA	Lightning Arrester
LA	Launch Aft
LA	Low Attitude
LAAD	Los Angeles Aircraft Division (Rockwell)
LACB	Landing Aids Control Building (SLF at KSC)
LACIE	Large Area Crop Inventory Experiment
LACIP	Large Area Crop Inventory Program
LAGEOS	Laser Geodynamic Satellite
LAGS	Launch Abort Guide Simulation
LAIR	Liquid Air
LAIU	Launch Abort Interface Unit
LAN	Local Area Network
LAPS	Left Aft Propulsion System (Subsystem)
LARS	Laminar Angular Rate Sensor
LARSSYAA	for Aircraft Analysis
LARSSYAA	Laboratory for Application of Remote Sensing System
LASCOT	Large Screen Color Television System
LASV	Low Altitude Supersonic Vehicle
LAT	Lateral
LAT	Latch
LAT	Large Angle Torque
LAT	Lot Acceptance Test
LAT	Latitude
LATS	LDEF Assembly and Transportation System
LB	Lower Brace
LB	Low Bay
LB	Load Bank
LB	Launch Bus
LB	Launch Boost
LBDT	Low Bay Dolly  Tug
LBK	Left Bank
LBL	Left Buttock Line
LBM	Load Buffer Memory
LBNPD	Lower Body Negative Pressure Device
LBR	Low Bit Rate
LC	Left Center
LC	Launch Complex
LC	Launch Critical
LC	Launch   Countdown
LCA	Load Controller (Control) Assembly
LCA	Launch Control Amplifier
LCA	Load controller assembly
LCB	Least Common Bit
LCC	Life Cycle Cost
LCC	Launch Control Center
LCC	Launch Commit Criteria
LCC	Launch Control Center (KSC)
LCCD	Launch Commit Criteria Document
LCD	Launch   Countdown
LCF	LowCycle Fatigue
LCG	Liquid Cooled Garment
LCG	Liquid-cooled garment
LCH	LatLaunch
LCH	Latch
LCHTF	LowCYcle High Temperature Fatigue
LCL	Local
LCM	Least Common Multiple
LCMS	LowCost Modular Spacecraft
LCO	MMCUniform Central Number
LCOM	Logic Control OutPut Module
LCR	LowCross Range
LCS	Launch Control System
LCS	LauList of Command Signals
LCT	Launch Countdown
LCU	Line Coupling Unit
LCUG	Liquid Cooling under Garment
LCVG	Liquid Cooling and Ventilation Garment
LCVG	Liquid cooling and ventilation garment
LD	LatLoading Dock
LD	Lateral Direction
LDB	LauLogistics Data Bank
LDB	Launch Data Bus
LDEC	Lunar Docking Events Controller
LDEF	Long Duration ExPosure Facility
LDG	Landing
LDIU	Launch Data Interface Unit
LDMK	Landmark
LDR	LowData Rate
LDR	Low data rate
LDS	Landing/Deceleration Subsystem
LDS	"LanLanding, Deservicing, and Safing"
LDS	LanLoads
LDT	Linear Displacement Transducer
LE	Launch Escape
LE	LauLeading Edge
LEA	Logistics Engineering Analysis (Analyses)
LEB	Lower Equipment Bay
LEC	Lockheed Electronics Company
LED	Light Emitting Diode
LED	Light-emitting diode
LEH	Launch/Entry Helmet
LEM	Launch Escape Monitor
LEM	Laboratory Environment Model
LEO	Low Earth Orbit
LER	Long Eye Relief (Optics)
LES	Launch Equipment Shop
LES	Launch Escape Subsystem
LESS	Leading Edge Structure Subsystem
LESS	Leading Edge Subsystem
LESS	Leading edge structure subsystem
LETF	Launch Equipment Test Facility
LETF	Launch Equipment Test Facility (KSC)
LF	Low Frequency
LF	Load Factor
LF	Left Forward
LF	Launch Forward
LF	Launch Facility
LFAF	Low Frequency Accelerometer Flutter
LFAM	Low Frequency Accelerometer Modes
LFAP	Low Frequency Accelerometer Pogo
LFC	Large Format Camera
LFO	Low Frequency Oscillator
LFOP	Landing and Ferry Operations Panel
LFRR	Low Frequency Radio Range
LG	Landing Gear
LG	Length
LGA	Low Gain Antenna
LGIU	Laser Gyro Interface Unit
LH	Left Hand
LH2	Liquid Hydrogen
LH2	Liquid hydrogen
LHA	Local Hour Angle
LHC	Left Hand Circular
LHCP	Left Hand Circular Polarization
LHCP	Left Hand Circularly Polarized
LHP	Left Hand Panel
LHS	Left Hand Side
LHe	Liquid Helium
LIB	Left Inboard
LIC	Load Interface Circuit
LID	Leadless inverted Device
LID	Logistics Identification Document
LIDAR	Laser-Radar
LIE	Left Inboard Elevon
LIM	Limit
LIMRC	LRU Identification and Maintenance Requirements Catal
LIMS	Logistics Inventory Management System
LIN	Liquid Nitrogen
LIN	Linear
LINJET	Liquid Injection Electric Thruster
LIQ	Liquid
LK	Leak
LK	Lock
LL	Low Level
LL	Lever Lock
LL	Lower Limit
LL	Lower Left
LL	Launch and Landing
LL	Launch Left
LL	Long Line
LL	Long Lead
LLCF	Launch and Landing Computational Facilities
LLI	Limited Life Item
LLIL	Long Leadtime Items List
LLOS	Landmark Line-of-Sight
LLP	Launch and Landing Project
LLPO	Launch and Landing Project Office
LLS	Launch and Landing Site
LLT	Long Leadtime
LM	Left Mid
LM	Long Module
LME	Launch Monitor Equipment
LMF	Lower Mid-Fuselage
LMG	Left Main Gear
LMK	Landmark
LMP	List of Measurement Points
LMS	Logistics Master Schedules
LMS	Load Measurement System
LMSC	Lockheed Missiles and Space Corporation
LN	Line
LN2	Liquid Nitrogen
LNCH	Launch
LNDG	Landing
LNG	Liquefied Natural Gas
LO	Lock-On
LO	Launch Operations
LO	Local Oscillator
LO2	Liquid oxygen
LOA	Landing Operations Area
LOA	Launch Operations Area
LOAP	List of Applicable Publications
LOB	Line of Balance
LOB	Left Outboard
LOC	Location
LOC	Localizer
LOC	Launch Operations Complex
LOCC	Launch Operations Control Center
LOE	Line of Effort
LOE	Level of Effort
LOE	Left Outboard Elevon
LOFAR	Low Frequency Acquisition and Ranging
LOFO	Low Frequency oscillation
LOGO	Limit of Government Obligation
LOI	Lunar Orbit Insertion
LOL	Limit of Liability
LOLI	Limited Operational-Life items
LON	Longitude
LONG	Longitude
LOR	Lunar Orbit Rendezvous
LORA	Level of Repair Analysis
LORAN	Long Range Navigation
LOS	Loss of Sync
LOS	Loss of Signal
LOS	Line of Sight
LOS	Lift-Off Simulator
LOT	Lift-Off Time
LOV	Limit of Visibility
LOV	Loss of Visibility
LOWG	Landing Operations Working Group
LOX	Liquid Oxygen (LO2
LP	Launch Pad
LP	Liquid Propellant
LP	Low Pressure
LPD	Landing Point Designator
LPD	Launch Procedure Document
LPDM	List of Physical Dimensions
LPF	Low Pass Filter
LPFT	LOPW Pressure Fuel Turboprop
LPFT	Low-pressure fuel turbopump
LPFTP	Low Pressure Fuel Turbopump
LPG	Last Page Generator (Distribution List Used in All OMT'S)
LPG	Liquid Propellant Gun
LPLWS	Launch Pad Lightning Warning System
LPM	Lines per Minute
LPOP	Low Pressure Oxidizer Turbopump
LPOT	Low-pressure oxidizer turbopump
LPOTP	Low Pressure Oxidizer Turbopump
LPOX	Low Pressure Oxygen
LPR	Line Printer
LPS	Launch Processing (Processor) System
LPS	Liters Per Second
LPS	Launch processing system
LPS/CDS	LPS/Central Data Subsystem
LPTTL	Low Power Transistor-Transistor Logic
LPW	Lumens per Watt
LR	Landing Radar
LR	Launch Right
LR	Left Rudder
LR	Lower Right
LR/LD	Line Receiver/Line Driver
LRECL	Logical Records of Fixed Length
LRF	Liquid Rocket Fuel
LRO	Large Radio Observatory
LRR	Launch Readiness Review
LRSI	Low Temperature Reusable Surface Insulation
LRSI	Low-temperature reusable surface insulation
LRU	Line Replaceable Unit
LRU	Line-replaceable unit
LRV	Long Range Video
LRV	Launch Readiness Verification
LS	Limit Switch
LS	Launch Sequence
LS	Landing Side
LS	Left Side
LS	Life Science
LS/ST	Light Shield/Star Tracker
LSA	Launch Services Agreement
LSA	Logistics Support Analysis
LSAH	Launch Site Accommodations Handbook
LSAP	Launch Sequence Applications Program
LSB	Lower Side Band
LSB	Least Significant Bit
LSC	Linear Shaped Charge
LSCA	Logistics Support Cost Analysis
LSD	Low Speed Data
LSD	Landing Ship Dock
LSE	Launch Support Equipment
LSE	Life Support Equipment
LSF	Laboratory Simulation Facility
LSFE	Life Sciences Flight Experiment
LSI	Large Scale Integration
LSID	Launch Sequence and Interlock Document
LSM	Life Science Module
LSM I	Logistics Support Management Information
LSO	Landing Support Officer
LSO	Large Solar Observatory
LSP	Least Significant Portion
LSPDF	Life Science Payloads Development Facility
LSR	Launch Site Recovery
LSR	Land Sea Rescue
LSRM	Life Science Research Module
LSS	"Landing, Separation Simulator"
LSS	Life Support Subsystem
LSS L	Life Sciences Space Laboratory
LSSF	Life Sciences Support Facility
LSSM	Launch Site Support Manager
LSSP	Launch Site Support Plan
LSSRC	Life Sciences Shuttle Research Centrifuge
LSST	Launch Site Support Team
LST	Large  Space   Telescope
LST	Large Stellar  Telescope
LST	Launch   Support    Team
LST	Liquid Storage Tank
LST	Local Standard Time
LSTE	Launch Site Transportation Equipment
LSU	Life  Support  Umbilical
LT	Lead Time
LT	Light
LT	Lef t
LTA	Lower   Torso   Assembly
LTD	Limited
LTD	Lift-to-Drag
LTG	Lighting
LTG	Linear Tangent Guidance
LTM	Lead Time Matrix
LUB	Lubricate
LUS	Liquid Upper Stage
LUT	Launcher-Umbilical Tower
LV	Loading Valve
LV	Low Voltage
LV	Load Vertical
LV	Launch Vehicle
LV	Lift Vector
LV	Limit Value
LVDC	Launch Vehicle Digital Computer
LVDT	Linear Variable Differential Transformer
LVDT	Linear Voltage Differential Transformer
LVL	Level
LVLH	Local Vertical/Local Horizontal
LVLH	Local vertical/local horizontal
LW	Launch Window
LWD	Left Wing Down
LWD	Launch  Window   Display
LWG	Logistics Working  Group
LWHS	Light-Weight Headset
LWHS	Lightweight headset
LWR	Lower
LWS	Lightning Warning System
LaRC	"Langley Research Center (Hampton, VA)"
LeRC	"Lewis Research Center (Cleveland, OH)"
Li	Lithium
LiOH	Lithium Hydroxide
LiOH	Lithium hydroxide
[M]
M   LGS	Microwave Landing Guidance System
M  LA	MDM Launch Aft
M  LA	Monochrome Lens Assembly
M B/S	Megabits per Second
M BAC	Marshall Booster Assembly Contractor
M DSD	Mate/Demate Stiffleg Derrick
M ECCA	Master Electrical Common Connector Assembly
M ESA	Modular Equipment Stowage Assembly
M ESA	Miniature Electrostatic Accelerometer
M ITTSE	Mobile lgor Tracking Telescope System
M PTP	Main Propulsion Test Program
M PTS	Multipurpose Tool Set
M&C	Monitor and Control Panel
M&C	Maintenance and Checkout
M&F	Materials and Facilities
M&M	Materials and Maintenance
M&O	Maintenance and Operations
M&P	Materials and Processes
M&R	Maintenance and Refurbishment
M&R	Maintenance and Repair
M&RF	Maintenance and Refurbishing Facility
M+R	Maintenance and Refurbishment
M+R	Time in Days before Move Operations
M+R	Maintenance and Repair
M-M-L-S	Model-Modes-Loads-Stresses
M/F	Maintenance Factor
M/I	Minimum Impulse
M/L	Maintenance Loop
M/LR	Maintenance Loop Recorder
M/P	Main Parachute
M/R	Mixture Ratio (Fuel to Oxidizer)
M/S	Measurement Stimuli
M/SCI	Mission/Safety Critical Item
M/U	Mockup
M50	Mean of 1950 (Coordinate System)
MA	Master
MA	Master Alarm
MA	Multiple Access
MA	Mission Analysis
MA	Missed Approach
MA	Mike Amplifier
MA	Maintenance (STS)
MA	Maintenance Ability
MA	Middeck Act
MA	Metabolic Analyzer
MA	Material Authorization
MA	Multiple-access
MA&P	Maintenance Analysis and Planning
MA&T	Manufacturing Assembly and Test
MAA	Mathematical Association of America
MAA	Mechanical Arm Assembly
MAA	Maximum Authorized Altitude
MAAB	Materials Application Advisory Board
MAAR	Monthly Associate Administrator's Review
MAB	Materials Advisory Board
MAB	Master Acquisition Bus
MAB	Missile Assembly Building
MAB	Materials Applications Board
MAB	Mechanical Automation Breadboard
MAC	Multiaccess Computer
MAC	Military Airlift Command
MAC	Mean Aerodynamic Chord
MAC	Main Display Console
MAC	Maintenance Advisory Committee
MAC	Maximum Allowable Concentration
MAC	Maximum Concentration of Organics
MAC	Mean aerodynamic chord
MACDS	Monitor and Control Display System
MACE	Mechanical Antenna Control Electronics
MACH	Machine
MACH	Velocity Relative to the Speed of Sound
MACI	"Monitor, Access, and Control Interface"
MACO	Major Assembly Checkout
MACRO	Merge and Correlate Recorded Output (Program)
MAD	Maintenance Analysis Data
MAD	"Madrid, Spain (STDN)"
MADC	Multiplexer Analog to Digital Converter
MADRE	Manufacturing Data Retrieval System
MADS	Modular Auxiliary Data Systems
MADS	Modular auxiliary data system
MAEP	Minimum Autoland Entry Point
MAF	Mixed Amine Fuel
MAF	Michoud Assembly Facility
MAF	Manpower Authorization File
MAG	Magazine
MAG	Magnetic
MAG	Magnitude
MAGSAT	Magnetometer Satellite
MAI	Machine-Aided Indexing
MAIDS	System
MAIDS	Multipurpose Automatic Inspection and Diagnostic
MAIDS	Management Automated Information Display System
MAIN	Maintenance
MAINT	Maintenance
MAIR	Manufacturing and Inspection Record
MAJ	Major
MAL	Malfunction
MAL	Material Allowance List
MAL	Mobile Airlock
MALL	Malleable
MAN	Microwave Aerospace Navigation
MAN	Manual
MANF	Manifold
MAOT	Maximum Allowable Operating Time
MAP	Maintenance Analysis Program
MAP	Mission Application Program
MAP	Missed Approach Point
MAP	Message Acceptance Pulse
MAPOLE	Magnetic Dipole Spark Transmitter
MAPS	Measurement of Atmospheric Pollution from Satellites
MAPS	Measurement of Air Pollution from Satellites
MAR	Memory Address Register
MAR	Maintenance and Refurbishment
MARS	Modular Airborne Recorder System
MARS	Martin Automatic Reporting System
MASDC	Military Aircraft Storage and Disposition Center
MAT	Multiple Actuator Test
MAT	Meteorological Atmospheric Turbulence
MAT	Matrix
MATCO	"Materials Analysis, Tracking, and Control"
MATL	Material
MAU	Million Accounting Units
MAUS	Schewerelosigkeit
MAUS	Messenschafteliche Autonome Experiment Unter
MAX	Maximum
MAXCO	Maximum Dynamic Pressure
MB	Management Baseline
MB	Main Bus
"MB, mbar"	Millibar
MBB	Messerschmitt-Boklow-Blahn
MBC	Maximum Breathing Capacity
MBCS	Motion-Base Crew Station (SMS)
MBFP	Manufacturing Build and Flow Plan
MBI	Multibus Interface
MBK	Medications and Bandage Kit
MBK	Medications and bandage kit
MBL	Mobile Unit (TACAN Station)
MBO	Management by Objective
MBPS	Million Bits per Second
MBPS	Megabits per Second
MBV	Main Base Visit
MC&C	"Measurement, Command, and Control"
MC&W	Master Caution and Warning
MCA	Multichannel Analyzer
MCA	Motor   Control   Assembly
MCA	Monitoring  and  Control  Assembly
MCA	Maximum Crossing Altitude
MCA	Master  Control   Assembly
MCBF	Mean Cycle between Failures
MCC	Main combustion chamber
MCC-DOD	Mission Control Center-DOD
MCC-H	Mission  Control Center-Houston
MCC-H	Mission Control Center-Houston
MCC-K	Mission  Control Center-Kennedy
MCC-NASA	Mission  Control Center-NASA
MCDS	Multifunction CRT Display System
MCDS	Maintenance Control and Display System
MCDS	Multifunction CRT display system
MCDU	Multifunction CRT Display Unit
MCF	Maintenance and Checkout Facility
MCF	Mission Control Facility
MCIU	Manipulator controller interface unit
MCL	Master Configuration  List
MCL	Mass  Change  Log
MCLT	Maximum Cruise Level Thrust
MCM	MADS control module
MCN	Master Change Notice
MCOP	Mission Control Operations Panel
MCP	Monitoring and Control Panel
MCP	Materials Control Plan
MCP	Master  Computer   Program
MCP	Mission Control Programmer
MCP	Measurements Control Procedure
MCP	Master Change Proposal
MCP	Monitoring and control panel
MCPC	Manipulator Controller Power Conditioner
MCPS	Major Cost Proposal System
MCR	Master Change Record
MCT	Mission  Control  Table
MCT	Maximum Climb Thrust
MCVP	Materials Control and Verification Program
MCiU	Manipulator Controller Interface Unit
MCiU	Mission Control and Interface Unit
MCiU	Master Control and Interface  Unit
MD	Microdot
MD	Biomedical Office (KSC Directorate)
MD	Malfunction   Detection
MD	Manual Direct
MD	Mission Director
MD	Manual Disconnect
MD	Master Dimension
MDA	Main Distribution Assembly
MDA	Maintainability Design Approach
MDA	Middeck Assembly (FDF)
MDA	Multiple Docking Adapter
MDA	Motor drive amplifier
MDAC	McDonnell Douglas Astronautics Company
MDAR	"Malfunction Detection, Analysis, and Recording"
MDAS	Meteorological Data Acquisition System
MDAS	Mission Data Acquisition System
MDB	Mission Data Book
MDC	Mission Director Center
MDC	Main Display Console
MDC	Mission Duty Cycle
MDCA	Main Distribution Control Assembly
MDCS	Material Data Collection System
MDCS	Master Digital Command System
MDCS	Malfunction Display and Control System
MDCS	Maintenance Data Collection System
MDD	Mate/Demate Device
MDD	Mate/demate device
MDDS	Material Directory Data Sheet
MDE	Modular Display Electronics
MDE	Mission Dependent Equipment
MDE	Mission Dependent Experiment
MDF	Manipulator Development Facility
MDF	Mating/Demating Facilities
MDF	Main Distribution Frame
MDF	Mild Detonating Fuse
MDF	Mild detonating fuse
MDL	Master Data  Library
MDM	Multiplexer/Demultiplexer
MDM	Medical Monitor
MDM	Manipulator Deployment Mechanism
MDM	Multiplexer/demultiplexer
MDR	Mission Data Reduction
MDR	Missing Data  Report
MDR	Minor Discrepancy Repair
MDR	Monthly  Director's  Review
MDR	Major Design Review
MDR	Maintenance   Demand   Rate
MDRD	Mission Data Requirements Document
MDRS	Mission Data Retrieval System
MDRS	Manufacturing Data Retrieval System
MDS	Mission Development Simulator
MDS	Malfunction Detection  System
MDS	Minimum Discernible  Signal
MDS	Master  Development  schedule
MDS	Minimum Discernible System
MDS	Management Data System
MDT	Mean Detonating Time
MDT	Mountain Daylight Time
MDT	Measurement Descriptor  Table
MDT	Maintenance   Demand   Time
MDT	Mean Down Time
MDTSCO	McDonnell Douglas Technical Services Company
ME	Management Engineering
ME	Main Engine
ME	Miscellaneous Equipment
MEA	Main Electronics Assembly
MEA	Maintenance Engineering Analysis
MEA	Material Experiment  Assembly
MEAR	Maintenance Engineering Analysis Request
MEAS	"Measuring, Measurement"
MEB	Main Electronics Box
MEBO	Main Engine  Burnout
MEC	Mission Events Controller
MEC	Master Event  Controller
MEC	Main Engine Controller
MEC	Master events controller
MECA	Main Engine Controller Assembly
MECF	Main Engine Computational Facilities
MECH	Mechanical
MECO	Main Engine Cutoff
MECO	Main engine cutoff
MECR	Maintenance Engineering Change Request
MED	Medical
MED	Medium
MED	Manual Entry Device
MEDICS	Medical Information Computer System
MEE	Mission Essential Equipment
MEG	Megohm
MEI	Master  Inspection  Item
MEIG	Main Engine Ignition
MEIU	Main Engine Interface Unit
MEL	Minimum Equipment List
MEL	Master  Equipment   List
MELI	Master Equipment List Index
MELI	Minimum Equipment List Index
MEM	Module Exchange Mechanism
MEM	Meteoroid Exposure Module
MEOP	Maximum Expected Operating Pressure
MEP	Mean Effective  Pressure
MEP	Main  Engine  Propellant
MEP	Main Entry Point
MEP	Management Engineering Program
MEP	Minimum Entry Point
MEP	Minimum entry point
MER	Meridian
MER	Mission Evaluation Room
MERL	Materials Engineering Research Laboratory
MERL	Materials Equipment Requirement List
MERSAT	Meteorology and Earth Observation Satellite
MERU	Milliearth Rate Unit
MES	Main Engine Start
MES	Mated  Events  Simulator
MES	Mission Events  Sequence
MES	Mated Elements Simulator
MESC	Master Events Sequencer Controller
MET	Master Events Timer
MET	Meteorological
MET	Mission Elapsed Time
MET	Mission Events Timer
MET	Mission elapsed time
METRO	Meteorology
METVC	Main Engine Thrust Vector
MEWG	Maintenance Engineering Working Group
MF	Midfuselage
MF	Mate and Ferry
MF	Major Function
MF	Master Frame
MF	Medium Frequency (300 to 3000 kHz)
MF	Middeck Forward
MFA	Manned  Flight  Awareness
MFBP	Manufacturing Flow and Building Plan
MFC	Multiple Flight  Computer
MFC	Multiple Flight Controller
MFD	Main Feed
MFD	Malfunction Detection
MFE	Mid  Frequency  Executive
MFF	MDM Flight Forward
MFG	Major Functional Group
MFG	Manufacturing
MFMR	Multifrequency Microwave Radiometer
MFO	Major Function Overlay
MFR	Manipulator Foot Restraint
MFR	Multifunctional Review
MFR	Maximum Flight Rate
MFR	Multifunctional Receiver
MFT	Mean Flight Time
MFTAD	Master Flight Test Assignment Document (JSC)
MFV	Main Fuel Valve
MFV	Main fuel valve
MG	Middle Gimbal (YAW)
MG	Mobile Generator
MGA	Middle Gimbal Angle
MGC	Manual Gain Control
MGE	Maintenance Ground Equipment
MGMT	Management
MGR	Manager
MGSE	Mechanical Ground Support Equipment
MGT	Major Ground Test
MGVT	Mated Ground Vibration Test
MHA	Multiple headset adapter
MHC	Manipulator Hand Controller
MHD	Multihead Disc
MHE	Material Handling Equipment
MHF	Medium High Frequency
MHSC	Manipulator Handset Controller
MHW	Multihundred Watt
MHz	Megahertz (Megacycles per Second)
MIA	Multiflex Interface Adapter
MIA	Multiplexer interface Adapter
MIA	Multiplexer interface adapter
MIB	Master Interconnect Board
MID	Midbody
MIL	Military
MIL	GSFC Spaceflight Tracking and Data Network Station
MILA	Merritt Island Launch Area
MILS	Missile Impact Location System
MILSTRIP	Military Standard Requisition and Issue Procedure
MIMOSA	Mission Modes and Space Analysis
MIN	Minimum
MINW	Master Interface Network
MIP	Modification Instruction Package
MIP	Mandatory Inspection Point
MIP	Minimum   Impulse    Pulse
MIP	MMU Integration Plan
MIPR	Military Intergovernmental Purchase Request
MIPS	Merritt Island Press  Site
MIR	Malfunction Investigation Report
MIR	Mirror
MIT	Master  Instruction   Tape
MIT	Massachusetts Institut@ of Technology (CSDL)
MJCA	Midbody Jettison Control Assembly
MK	Mark
MKTI	Mission Kit Technical Instruction
ML	Mobile Launcher
ML	Mold Line
ML	Middeck Left
ML PED	Mobile  Launcher  Pedestal
MLB	Multilayer Board
MLC	Mobile Launcher Computer
MLF	MDM Launch Forward
MLG	Main Landing Gear
MLG	Main landing gear
MLI	Multilayer Insulation
MLL	MDM Launch Left
MLP	Mobile Launch (Launcher) Platform
MLP	Mobile launcher platform
MLR	Monodisperse Latex Reactor
MLR	MDM Launch Right
MLS	Microwave Landing System
MLS	Microwave landing system
MLW	Maximum Landing Weight
MM	Major mode or mass memory
MMACS	Maintenance Management and Control System
MMAS	Material Management Accounting (Accountability) System
MMC	Mid motor controller
MMCA	Midbody Motor Control Assembly
MMCA	Mid motor controller assembly
MMCL	Master Measurement and Control List
MMDB	Master Measurement Data Base
MMDB	Mass Memory Data Base
MMDF	Mission Model Data File
MMES	MSFC Mated Element Systems
MMH	Maintenance Man-Hour
MMH	Monomethylhydrazine
MMH	Monomethyl hydrazine
MML	Master Measurement(s) List
MMLS	Model-Modes-Loads-Stresses
MMPSE	Multiuse Mission Payload Support Equipment
MMS	Multimission modular spacecraft
MMSE	Multiuse Mission Support Equipment
MMSE	Multiuse mission support equipment
MMT	Mass Memory Test
MMU	Mass memory unit
MMU	Manned maneuvering unit
MN	Main
"MNA, B, C"	"Main Bus A, B, or C"
MNVR	Maneuver
MOA	Memorandum of Agreement
MOA	Minute-of-Angle
MOA	Make on Arrival
MOCF	Mission Operations Computational Facilities
MOCR	Mission Operations Control Room
MOD	Mission Objectives Document
MOD	Mission Operations Director
MOD	Modification
MOD	Modify
MOD	"Modulation, Modulator"
MOD	"Module, Modular"
MODARI-	Methods of Defeating Advanced Radar Threats
MODEM	Modulator-Demodulator
MODS	Modifications
MOF	Manned Orbital Flight
MOL	Molecular
MON	Monitor
MOP	Mission Operations Plan
MOPI	Max Rate Output Initiator
MOPR	Mission Operations Planning Review
MOPR	Mission Operations Planning Room
MOPS	Military Operations Phone System
MOPS	Mission Operations Planning System
MOR	Manufacturing Operation Record
MORD	Mission Operations Requirements Document
MORD	Medical Operations Requirements Document
MORT	Management oversight and Risk Tree
MOS	Metal Oxide Semiconductor
MOS	Metal Oxide on a Substrate
MOSPO	Mobile Satellite Photometric Observatory
MOT	Motor
MOV	Main oxidizer valve
MP	Mod Package
MP	Mission Planner
MP	Melting Point
MP	Meteorology Panel
MP	Measuring Point
MP	Mass Properties
MP	Management Package
MP	Medium Pressure
MP&C	Maintenance Planning and Control
MPAD	Mission Planning and Analysis Division (JSC)
MPB	Maintenance Parts Breakdown
MPC	Midbody Pyro Controller
MPC	Meteorological Prediction Center
MPC	Memory Protection Check
MPC	Manual Pointing Controller
MPC	Mid power controller
MPCA	Mid power controller assembly
MPD	Maximum Permissible Dose
MPD	Main dc Power Distributor Assembly
MPESS	Mission Peculiar Experiment Support Structure
MPG	Multipoint Grounding
MPG	Multiple Point Ground
MPGHM	Mobile Payload Ground Handling Mechanism
MPHE	Material and Personnel Handling EqLjipment
MPI	Mission Payload Integration
MPIIN	Modification Procurement Instrument Identification
MPIIN	Number
MPIO	Mission Payload Integration Office
MPL	Mechanical Parts List
MPL	Manipulation Positioning Latches
MPL	Maintenance Parts List
MPL	Minimum Power Level (65%)
MPL	Minimum power level
MPLN	Maintenance Planning (Data Base)
MPM	Manipulator Positioning Mechanism
MPM	Manipulator positioning mechanism
MPMP	Mass Properties Management Plan
MPMSE	Multiuse Payload and Mission Support Equipment
MPP	Material Processing Procedure
MPPSE	Multipurpose Payload Support Equipment
MPR	Maintainability Problem Report
MPR	Management Program Review
MPR	Mockup Purchase Request
MPS	Material Processing System
MPS	"Master Program ,;chedule"
MPS	Main Propulsion System (Subsystem)
MPS	Material Processing Specification
MPS	Materials Processing in Space
MPS	Megabits per Second
MPS	Main propulsion system
MPSR	Mission Profile Storage and Retrieval
MPSR	Multipurpose Support Room
MPSR	Multipurpose Support Room
MPST	Multipurpose support team
MPT	Main Propulsion Test
MPTA	Main Propulsion Test Article
MPTA	Main propulsion test article
MPTF	Main Propulsion Test Facility
MPVA	Main Propellant Valve Actuator
MR	Mission Report
MR	Mixture Ratio
MR	Material Review
MR	Master Reset
MRA	Mechanical Readiness Assessment
MRB	Material Review Board
MRC	Measurement Requirements Committee
MRCR	Measurement Requirement Change Request
MRD	Mission Requirements Document
MRD	Material Review Disposition
MRDR	Material Review Disposition Record
MRF	Measurements/Stimuli Request Form
MRF	Maintenance Responsibility File
MRF	Maximum Retarding Force
MRI	measurement Requirements and Interface
MRIR	Medium Resolution Infrared Radiometer
MRL	Manipulator Retention Latches
MRL	Manipulator Retention Lock
MRL	Material Requirements List
MRL	Manipulator retention latch
MRL	Manipulator retention latch
MRR	Mission Reconfiguration Request
MRS	Management Review System
MRTC	Multiple Real-Time Commands
MS/MS	Material Science and Manufacturing in Space
MSA	Minimum Surface Area
MSA	Material Service Area
MSA	MSA-1
MSAD	Materials Summary Acceptance Document
MSB	Most Significant Bit
MSBLS	Microwave Scanning Beam Landing System
MSBLS	Microwave Scanning Beam Land Station
MSBLS	Microwave scan beam landing system
MSBLS-GS	MSBLS Ground Station
MSCR	Measurement/Stimuli Change Request
MSD	MARS Supplemental Data
MSDS	Multispectral Scanner and Data System
MSE	Mechanical Support Equipment
MSE	Maintenance Support Equipment
MSE	Measuring and Stimuli Equipment
MSE	Mission  Staff  Engineer
MSE	Medical Support Equipment
MSEC	Master Separation Events Controller
MSF	Manned Space Flight
MSF	Maintenance Source File
MSFC	George C. Marshall SPace Flight Center
MSFC	Marshall Space Flight Center
MSFN	Manned Space Flight Network
MSFP	Manned Space Flight Program
MSG	Mission  Support   Group
MSG	Message
MSG	Mechanical Subsystem Group
MSIA	Multispectral Image Analyzer
MSID	Measurement Stimulation identification
MSK	Manual  Select  KeYboard
MSL	Missile
MSL	Mechanical System(s) Laboratory
MSL	Mean Sea Level
MSLD	Mass Spectrometer Leak Detector
MSN	Mission
MSOB	Manned Spacecraft Operations Building (O&C preferred)
MSOIN	Minor Subcontractor or IDWA Notification
MSR	Module Support Rack
MST	Module Service Tool
MST	Mountain Standard Time
MST	Measurement Status Table
MST	Mobile Service Tower
MSTR	Master
MSVP	Master Shuttle Verification Plan
MT	Mission Time
MT	Mean Time
MT	Mission Trajectory
MT	Mechanical Technician
MT	Maximum Torque
MT	Magnetic Tape
MT	Master Timer
MT	Mountain Time
MT	Master Tool
MT	Mount
MTA	Mass Thermal Analysis
MTA	Major Test Article
MTA	Maintenance Task Analysis
MTB	Materials Testing 13ranch
MTBD	Mean Time between Demand
MTBF	Mean Time between Failure
MTBM	Mean Time between Maintenance
MTBMA	Mean Time between Maintenance Action
MTBR	Mean Time between Replacement
MTC	Manual Traffic Control
MTC	Master Thrust control
MTC	Master Thrust Controller
MTC	Mission and Traffic Control
MTCA	Monitor and Test Control Area
MTCU	Magnetic Tape Control Unit
MTD	Mounted
MTDSK	Magnetic Tape Disk
MTE	Multisystem Test Equipment
MTE	Maintenance Test Equipment
MTEC	Maintenance Test Equipment Catalog
MTEE	Electrical Maintenance Test Equipment
MTEEC	Electronic Maintenance Test Equipment
MTEF	Fluid Maintenance Test Equipment
MTEM	Maintenance Test Equipment Module
MTEM	Mechanical Maintenance Test Equipment
MTEO	Optical Maintenance Test Equipment
MTF	Mississippi Test Facility (now NSTL)
MTFO	Modular Training Field Option
MTG	Mounting
MTGP	Monitor Table Generator Program
MTGW	Maximum Total Gross Weight
MTK	Mechanical Time Keeping
MTL	Material
MTL	Main Transfer Line
MTLP	Monitor Table Listing Program
MTM	Methods Time Measurement
MTO	Modification Task Outline
MTO	Magnetic Tape Operator
MTO	Master Timing Oscillator
MTO	Maximum Time Out
MTO	"Mission, Task, Objective"
MTOGW	Maximum Takeoff Gross Weight
MTOW	Maximum Takeoff Weight
MTP	Master Test Plan
MTP	Manufacturing Technical Procedure
MTP	Mission Test Plan
MTR	Motor
MTR	Magnetic Tape Recorder
MTS	Metric Time System
MTS	Master Timing System
MTS	Magnetic Tape Station (System)
MTT	Maximum Touch Temperature
MTTA	Mean Time to Accomplish
MTTE	Mean Time to Exchange
MTTF	Mean Time to Failure
MTTFF	Mean Time to First Failure
MTTR	Mean  Time   to   Repair
MTU	Magnetic Tape Unit
MTU	Master Timing Unit
MTU	Mobile   Training   Unit
MTU	Master timing unit
MTVC	Manual Thrust Vector Control
MTVC	Manual thrust vector control
MTW	Maximum   Taxi    Weight
MUA	Material(s) Usage Agreement
MUA	Maximum Usable Altitude
MUF	Maximum Usable Frequency
MULT	Multiple
MULT	Multiply
MUR	Manpower Utilization Report
MUSAT	Canadian Government Satellite
MVA	Main Valve Actuator
MVA	Megavolt Ampere
MVAS	Multipurpose Ventricular Actuating System
MVF	Manned  Vertical  Flight
MVGVT	Mated Vertical Ground Vibration Test
MVP	Master Verification Plan
MVR	Maneuver
MVT	Mission Verification Test
MWB       M	MWB       Master Work Book
MWG       M	MWG       Maintenance Analyzer Working Group
MWP       M	MWP       Maximum Working Pressure
MWPR      M	MWPR      Monthly Work Package Report
MWR       M	MWR       Mean Width Ratio
MY        M	MY        Man Year
MYTA      M	MYTA      Maintainability Task Analyses
MYVAL     M	MYVAL     Maintainability Evaluation
MZFW      M	MZFW      Maximum Zero Fuel Weight
Mbps	Megabits per second
Mg	Magnesium
MiCiS	Material Information Control and Information System
MiMS	Medical Information Management System
Mo	Molybdenum
Ms	Master Switch
Ms	Mass Spectrometer
Ms	Material Specification
Ms	Mission Station
Ms	Mating Sequence and Control
Ms	Milestone
Ms	Military Standard (Parts Designation)
Ms	Millisecond
Ms	Multistring
Ms	Margin of Safety
Ms	Mission SPecialist
Ms	Machine Steel
Ms	Machine Screw
[N]
N	Neutrons
N	Newton
N	North
N&G	Navigation and Guidance (G&N preferred)
N/0	Normally Open
N/A	Not Applicable
N/A	Next Assembly
N/B	Narrow Band
N/C	Numerical Control
N/C	Normally Closed
N/C	Nose Cone
N/C	Not Critical
N/D	Need Date
N/P	Not Provided
N/W	Network
N02	Nitrogen Dioxide
N2	Nitrogen
N2	Nitrogen
N204	Nitrogen Tetroxide
N2H4	Hydrazine
N2HO4	Nitrogen Peroxide
N2O4	Nitrogen tetroxide
NA	Next Action
NA	Not Applicable
NAAL	North American Aerodynamic Laboratory (Wind Tunnel)
NAC	Nacelle
NAEC	Naval Air Engineering Center
NAM	National Association Of Manufacturers
NAP	Navigation Analysis Program
NAR	Numerical Analysis Research
NARS	National Archives and Record Services
NAS	National Aircraft Standard
NAS	National Academy of Sciences
NAS	Naval Air Station
NASA	National Aeronautics and Space Administration
NASA	National Aeronautics and Space Administration
NASCOM	NASA Communications (Network)
NASTRAN	NASA Structural Analysis
NATF	Naval Air Test Facility
NATL	National
NAV	"Navigate, Navigation"
NAVAID	Navigation Aid
NAVDAD	Navigationally Derived Air Data
NAVPOOL	Navigation Parameter Common Pool
NAVSAT	Navigation Satellite
NB	Navigation Base
NB	No-Bias (Relay)
NB	Nitrogen Base
NB	Narrow Band
NBF	Neutral Buoyancy Facility
NBS	National Bureau of Standards
NBT	Neutral Buoyancy Trainer
NC	Numerical Control
NC	No  Comment
NC	Noise Criteria
NC	Normally Closed
NC	No Change
NC	National Course
NC	Normally closed
NC1	Nominal Correction 1 (Phasing Maneuver)
NCC	NASA Class Code
NCC	Nominal Corrective Combination (Maneuver)
NCC	Network Control Center (GSFC)
NCGS	Nuclear Criteria Group Secretary
NCI	Phasing Maneuver
NCIU	Network Common Interface Unit
NCR	No Calibration Required
NCR	Nonconformance/Failure Report
NCS	Nutation Control System
ND	NASA Document
NDE	Nondestructive Evaluation
NDI	Nondestructive Inspection
NDT	Nondestructive Test
NDTF	Nondestructive Test Facility
NDTL	Nondestructive Test Laboratory
NEA	Noise Equivalent Angle
NEC	National Electrical Code
NEG	Negative
NEP	Nominal entry point
NEP       N	NEP       Normal Entry Point
NESC      N	NESC      National Electrical Safety Code
NESR      N	NESR      Natural Environment Support Room
NET       N	NET       Network (N/W preferred)
NETCOM    N	NETCOM    Network Communications
NF        N	NF        Natural  Flood
NFCS      N	NFCS      Nuclear Forces Communications Satellite
NFPA      N	NFPA      National Fire Protection Association
NFS       N	NFS       Nozzle Flow Sensor
NFSP      N	NFSP      Nonflight Switch Panel
NFW       N	NFW       Nonfuel Wasting
NG        N	NG        Narrow Gage
NGM       N	NGM       Nitrogen Generation Module
NGT	NASA Ground Terminal
NH        N	NH        Nominal Heig4t (Adjust Maneuver)
NH3	Ammonia
NH3       A	NH3       Ammonia
NH4       H	NH4       Hydrazine
NHA       N	NHA       Next Higher Assembly
NHB       N	NHB       NASA Handbook
NHC       N	NHC       National Hurricane Center
NI-SIL    N	NI-SIL    Nickel-Silver
NIA       N	NIA       NOVA Interface Adapter
NIB       N	NIB       Noninterference Basis
NIC       N	NIC       Not in Contract
NICD      N	NICD      Nickel Cadmium
NIDS      N	NIDS      Network Interface Data System
NIL       N	NIL       No Limit (NL preferred)
NIM       N	NIM       Nuclear Instrumentation Module
NIP       N	NIP       Network Input Processor
NJP       N	NJP       Network Job Processing
NL        N	NL        No Limit
NLA       N	NLA       Npxt Lower Assembly
NLG	Nose Landing Gear
NLG	Nose landing gear
NLT	Not Later Than
NLT	Not Less Than
NM	Nautical Miles
NM	Network Manager (GSFC)
NM	Nonmetallic
NMAB	National Materials Advisory Board
NMC	National Meteorological Center
NMI	NASA Management Instruction
NMI	Nautical Miles
NMO	Normal Manual Operation
NMR	Nuclear Magnetic Resonance
NMT	Notification of Master Tool
NMT	Not More Than
NMV	Nitrogen Manual Valve
NNI-I	NASA Standard Initiator-Type I (was SMSI)
NO	Nitric Oxide
NO	Normally Open
NO	Not for Off -KSC Distribution
NO	Normally open
NO.	Number
NOAA	National Oceanic and Atmospheric Administration
NOC	Notation of Content
NOC	Network Operation Control
NOC	Not Otherwise Coded
NOCC	Network Operations Control Center
NOCC	Network Operations Control Center (GSFC)
NOES	National Operational Environmental Satellite Serv.
NOM	Nominal
NOM	Network OutPut Multiplexer
NOR	Normal
NOR	"Northrup Flight Strip, NM (Deorb OPT site)"
NORAD	North American Air Defense Command
NORDSAT	Scandinavian Countries Broadcast Satellite
NORM	Normal
NOSL	Night/Day Optical Survey of Thunderstorm Lightning
NOSP	Network Operations Support Plan
NOSS	National Oceanic Survey Satellite
NOZ	Nozzle
NP	Neptunium
NPC	NASA Publication Control
NPD	NASA  Policy   Directive
NPDS	Nuclear Particle Detection Subsystem
NPL	Normal Power Level (see RPL)
NPN	NASA Part Number
NPRV	Nitrogen Pressure Relief Valve
NPS	NASA  Planning   Studies
NPSH	Net Positive Suction Head
NPSP	Net Positive Static Pressure
NPU	Nitrogen Purge Unit
NPV	Nitrogen Pressure  Valve
NR	Noise Rating
NR/T	Near Real-Time
NRC	Nonrecurring Costs
NRCC	National Research Council of Canada
NRI	NonreCurring  Investment
NRL	Naval Research Laboratory
NRM	Nonrecurring Maintenance
NRP	Normal Rated Power
NRS	Nonconformance Reporting System
NRT	Near Real-Time
NRTS	Not Repairable at This Station
NRZ	Non-Return-to-Zero
NRZ-L	Non-Return-to-Zero Level
NS	Nickel Steel
NSA	National Standards Association
NSD	NASA standard detonator
NSGT	NASA Ground Terminal
NSI-I	NASA Standard Initiator-Type I (was SMSI)
NSN	National Stock Number
NSO	NASA Support Operation
NSP	NASA  Support   Plan
NSP	Network Signal Processor
NSP	Network signal processor
NSR	Nominal  Slow   Rate
NSR	Normal Slow Rate (Maneuver)
NSR	National  Slow  Rate
NSR1	First Coell;ptic Maneuver
NSR2	Second Coelliptic Maneuver
NSS	Nitrogen Supply Subsystem
NSSDC	National Space Science Data Center
NSTL	National Space Technology Laboratory (was MTF)
NSTL	National Space Technology Laboratories
NSW	NSP Status Word
NTIS	National Technical Information Service
NTO	Nitrogen   Tetroxide
NTP	Network  Test  Panel
NTP	Normal Temperature and Pressure
NTP	Notice  To   Proceed
NTS	Not to Scale
NTS	Near  Term  Schedule
NTSO	NASA Test Support Office
NTTF	Network Test and Training Facility
NUL	Non-GSE Utilization List
NVAFB	North Vandenberg Air Force Base
NVB	Navigational Base
NVPOWG	NASA/VAFB Payload Operations Working Group
NVR	No  Voltage  Release
NVR	Nonvolatile  Residue
NVR	Non-Verification Required
NW	Nose Wheel
NW	NASA Waiver
NWS	Nose-Wheel  Steering
NWS	National Weather Service
NWS	Nose wheel steering
NWSA	Nose Wheel Steering Amplifier
NWSI	New World Services Inc.
NWT	Nonwatertight
NWW	Nose Wheel Well
NX	NOrmal to X-Axis
NY	Normal to Y-Axis
NZ	Normal Acceleration
NZB	Non Zero Binary
Nascom	NASA communications network
Nb	Niobium
Nd	Neodymium
Net Positiv	Net Positive Suction Pressure
Network Int	Network Interface Processor
Network Pro	Network Program
Ni        N	Ni        Nickel
Nitrogen  G	Nitrogen  Gage
Nitrogen  P	Nitrogen  Purge  Control
Noise Figur	Noise Figure
Nominal Per	Nominal Percent Defective
Normal Load	Normal Load Factor (g)
Normal to Z	Normal to Z-Axis
Nose to X-A	Nose to X-Axis
Nose to Y-A	Nose to Y-Axis
Nose to Z-A	Nose to Z-Axis
Not Provide	Not Provided
Not Require	Not Required
Not Switcha	Not Switchable
Nuclear Shu	Nuclear Shuttle
[O]
O	Engineering Order
O&C	Operation(s) and Checkout (Building-was MSOB)
O&C	Operation and Checkout
O&C	Operations and control
O&C	Operations and checkout
O&FS	operations and Flight Support
O&M	Operation and Maintenance
O&P	operations and Procedures
O&R	Overhaul and Repair
O-NAV	Onboard Navigation
O/B	Operational Base
O/B	Onboard
O/C	Operations Critical
O/D	On Dock
O/D	Outside Diameter
O/ET	Orbiter/External Tank
O/F	Oxidizet--to-Fuel Ratio
O/L	Overload
O/L-RC	Overload-Reverse Current
O/R	Oxygen Relief
O/R	Outside Radius
O/V	Overvoltage
O/V-U/V	over Voltage/Under Voltage
O2	Oxygen
OA	Overall
OA	Output Axis
OA	Orbital Assembly
OA	Operational Instrumentation MDM-Aft
OA	Office of Applications (now OSTA)
OA	Operational Aft (DSC or MOM)
OAA	Orbiter Access Arm
OAA	Orbiter Alternate Airfield
OAA	Orbiter access arm
OAC	Quality Assurance Chart
OAFD	Orbiter Air Flight Deck
OAFTO	Orbiter Atmospheric Flight Test Office
OAL	Overall Level
OALC	Ogden Air Logistics Center
OAMS	Orbital Attitude and Maneuvering System
OAS	Office Automation System
OAS	Orbiter Aeroflight Simulator
OAS	Orbiter Atmospheric Simulator
OAS	Orbiter Avionics System
OASCB	Orbiter Avionics Software Control Board
OASIS	Oceanic and Atmospheric Scientific Information System
OASPL	Overall Sound Pressure Level
OAST	Office of Aeronautics and Space Technology
OAT	Overall Test
OAT	Operational Acceptance Test
OB	Onboard
OB	Operational Base
OB	Outboard
OBC	Onboard Computer
OBCO	Onboard Checkout (Instrumentation)
OBCS	Onboard Checkout Subsystem
OBS	"Observe, Observer"
OBS	Operational Biomedical System
OBS	Operational Biomed Sensors
OBS	Operational Bioinstrumentation System
OBS	Operational bioinstrumentation system
OBV	Oxidizer Bleed Valve
OCALC	Oklahoma City Air Logistics Center
OCD	Operational Capability Development
OCDR	Orbiter Critical Design Review
OCDU	Optics Coupling Data Unit (G&N)
OCE	Ocean Color Experiment
OCF	Orbiter Computational Facilities
OCF	Onboard Computational Facility
OCH	Orbiter Common Hardware
OCN	Order Control Number
OCP	Output Control Pulse
OCR	Optical Character Recognition
OCRM	Orbiter Crash and Rescue Manuals
OCT	"Octal, Octave"
OD	Operations Directive
OD	Operational Downlink/Downlist
OD	Outside Diameter
OD	Oxygen Drain
ODB	Operational Data Book
ODC	Other Direct Costs
ODCDR	Orbiter Delta CDR
ODDS	Operational Data Delivery Services
ODES	Optical Discrimination Evaluation Study
ODF	Orbit Determination Facility
ODIN	Orbital Design Integration (System)
ODP	Operational Display Procedure
ODR	OutPut Data Redundancy
ODRAN	Operational Drawing Revision Advance Notice
ODU	Output Display Unit
OEAS	Orbital Emergency Arresting System
OECO	Outboard Engine CLjtoff
OEM	Original Equipment Manufacturer
OES	Orbiter Emergency Site
OESS	Orbiter/ET Separation Subsystem
OEX	Orbiter Experiments
OEX	Orbiter experiments
OF	Operational FWD DSC or MDM
OF	Operational Instrumentation MDM-FWD
OF	Orbital Flight
OF	Outside Face
OF	Oxidizer-to-Fuel Ratio
OF	Oxygen Fill
OFCC	Office of Federal Contract Compliance
OFDS	Oxygen Fluid Distribution System
OFDS	Orbiter Flight Dynamics Simulator
OFI	Operational Flight Instrumentation
OFI	Operational flight instrumentation
OFK	OPtical Flight Kit
OFK	Officiaf Flight Kit
OFM	Original Equipment Manufacturer
OFP	Operational Flight Profile
OFP	Operational Flight Program
OFP	Orbiter Flight Program
OFS	Orbiter   Functional   Simulator
OFS	Orbital (Orbiter) Flight System
OFT	Orbital Flight Test
OFTDS	Orbital Flight Test Data System
OFTM	On-Orbit Flight Technique Meeting
OFTR	Orbital Flight Test Requirement
OG	Zero Gravity
OG	Outer Gimbal (Roll)
OG	Oxygen Gage
OGA	Outer Gimbal Angle
OGA	Outer Gimbal Axis
OGE	Operating    Ground    Equipment
OGMT	Orbiter  Greenwich   Mean   Time
OGS	Outer Glideslope
OGS	Oxygen Generation System
OGS	Quantity Gaging System
OGV	Oxygen Gage Valve
OH	Overhaul
OH	Overhead
OHA	Operational Hazard Analysis
OHA	Orbital Height Adjustment Maneuver
OHC	Onboard Hard Copier
OHC	Optics Hand Controller
OHF	Occupational Health Facility
OHGVT	Orbiter Horizontal Ground Vibration Test
OHMM	Ohmmeter
OI	Operational instrumentation
OIA	Orbiter Interface Adapter
OIA	Office of International  Affairs
OIB	Orbiter Interface Box
OIR	Operations  Integration   Review
OISR	Open Item Status Report
OISSP	Office of Interim Space Station Program
OIT	Orbiter Integrated Test
OJT	On-the-Job Training
OL	Operational Left DSC or MDM
OL	Open Loop
OLDB	On-Line Data Bank
OLDR	Quick Look Data Reference
OLF	Orbiter Landing Facility (now SLF)
OLIF	Orbiter Landing Instrumentation Facilities
OLOW	Orbiter Lift-off Weight
OLSA	Orbiter/LPS Signal Adapter
OLSP	Orbiter Logistics Support Plan
OM	Outer Marker (ILS)
OM	Optical Master
OM	Operational Mid DSC or MDM
OM	Orbiter Main Engine
OM	Orbital Maneuvering Engine
OM   RS	Operations and Maintenance Requirements Specification
OMA	Orbiter Maintenance Area
OMA	Operations Maintenance Area
OMB	Office of Management and Budget
OMBUU	Orbiter Midbody Umbilical Unit
OMCF	Operations and Maintenance Control File
OMCF	Orbiter Maintenance and Checkout Facility
OMD	Operations and Maintenance Documentation
OMD	Orbiter Mating Device
OMDR	Operations and Maintenance Data Record
OMDRI	Operations and Maintainability Data Record
OME	Orbital Main Engine
OMET	Orbiter Mission Elapsed Time
OMEWG	Orbiter Maintenance Engineering Working Group
OML	Outer  Mold  Line
OML	Orbiter Mold Line
OML	Outside Mold Line
OMMH	Orbiter Maintenance Man-Hours
OMNI	Omni-Range
OMNI	Omnidirectional
OMP	Operations and Maintenance Plan
OMPR	Operational Maintainability Problem Reporting
OMPT	Observed Mass Point Trajectory
OMR	Orbiter Management Review
OMR	Operations Management Room
OMR	Operations and Maintenance Requirements
OMRB	Operating Material Review Board
OMRC	Operational Maintenance Requirements Catalog
OMRF	Orbiter Modification and Refurbishment Facility
OMRP	Operations and Maintenance Requirements Plan
OMRSD	Document
OMRSD	Operational Maintenance Requirements and Specification
OMRSD	O&M Requirements and Specifications Documentation
OMRSD	Operational Maintainability Reporting Systems Document
OMS	Orbital maneuvering system
OMSF	Office of Manned Space Flight (now OSTS)
OMSP	Operational Maintenance Support Plan
OMiS	Operational Management Information System
OMiSS	Operation and Maintenance Instruction Summary Sheet(s)
ONBD	Onboard
ONBT	Orbiter Neutral Buoyancy Trainer
OND	Operator Need Date
ONR	Office of Naval Research
OOD	Orbiter   On-Dock
OODP	Out-of-Detent Pitch
OODR	Out-of-Detent Roll
OOP	Out of Position
OOSDP	On-Orbit Station Distribution Panel
OOT	Out of  Tolerance
OP	Operate
OP	Oxygen Purge
OP	Operation
OP	Open
OPA	Operations Planning Analysis
OPB	Oxidizer Preburner
OPBOV	Oxidizer Preburner Oxidizer Valve
OPDAR	OPtical Detection and Ranging
OPE	Other Project Element
OPER	"Operations, Operate, Operator"
OPER	Operation
OPF	Orbiter Processing Facility
OPF	Orbiter Processing Facility
OPFC	Orbiter Preflight Checklist
OPGUID	OPtimum Guidance (Technique)
OPI	Orbiter Payload Interrogator
OPIDF	Operational Planning Identification File
OPIS	Orbiter Prime Item Specification
OPL	Open Problem List
OPL	Operational
OPLF	Orbiter Processing and Landing Facility
OPNS	Operational Phase
OPO	Orbiter Project(s) Office
OPOV	Oxidizer Preburner Oxidizer Valve
OPOV	Oxidizer preburner oxidizer valve
OPP	OPPosite
OPP	Opportunity
OPPAR	Orbiter Project(s) Parts Authorization Request
OPPL	Orbiter Project Parts List
OPR	Oxygen Pressure Regulator
OPR	Orbiter/Payload Recorder
OPR	Operator
OPR	Operations Planning Review
OPR	Office of Primary Responsibility
OPRV	Oxygen Pressure Relief Valve
OPS	Orbiter Project schedules
OPS	Oxygen Purge System
OPS	Operations Sequence
OPS	Operations
OPS	Operational sequence
OPSB	Orbiter Processing SuPport Building
OPSR	Operations Supervisor (GSTDN Site)
OPSS	Orbital Propellant Storage Subsystem
OPT	optimum
OPT	optics
OPT	Option
OPT	OPerational Pressure Transducer
OPTB	Operational Program  Time  Base
OPTB	Opposite
OR	Operations Room
OR	Operations Review
OR	Operations Requirement
OR	Outer Roll
OR	Oxygen Relief
OR	OPerational Right
ORB	"Orbit, Orbital, Orbiter"
ORB	Order
ORB  1 -g	Orbiter one-g (trainer)
ORCHIS	Oak Ridge Computerized Hierarchical Information
ORCHIS	System
ORD	Operational Requirements Document
ORD	Operational Readiness Date
ORD	Operational Ready Data
ORD	Ordnance
ORD	Orbital  Requirements  Document
ORDC	Orbiter Data Reduction Center
ORE	On-Orbit Repair Experiment
ORF	Orifice
ORG	Organization
ORI	Operational Readiness Inspection
ORIDE	Override
ORIEN	Orientation
ORIG	Origin
ORLA	OPtimum Repair Level Analysis
ORP	OFS Retransmission Processor
ORR	Operational Readiness Review
ORR	Operations Requirements  Review
ORS	"Orroval Valley, Australia (STDN)"
ORS	Orbital Refueling System
ORSDI	Oak Ridge Selective Dissemination of Information
ORT	Orbit Readiness Test
ORT	Operational Readiness Test
ORTHOG	Orthogonal
OSA	Operational Support Area
OSDH	Orbiter System Definition Handbook
OSE	Orbiter Support Equipment
OSE	Operating SupPort Equipment
OSF	Office of Space Flight (now OSTS)
OSF	Ordnance Storage Facility
OSHA	Occupational Safety and Health Act (Activity)
OSHA	Occupational Safety and Health Administration
OSLM	Operations ShOP/Lab Manager
OSMP	Operational SuPport Maintenance Plan
OSOP	Orbiter Systems Operating Procedures
OSP	Operations Support Plan
OSR	Operations Support Room
OSSA	Office of Space Science and Applications
OSSRH	Orbiter Subsystem(s) Requirements Handbook
OST	Orbiter SuPport Trolley
OST	Operations Support Team (GSFC)
OSTA	Office of Space and Terrestrial Application(s)
OSTDS	Office of Space Tracking and Data Systems
OSTO	Office of Space Transportation Operations
OSTP	Orbiting System Test Plan
OSTS	Office of Space Transportation Systems
OT	Operational instrumentation MDM-Tank
OT	Out Temperature
OT	Operating Time
OT	Overti me
OT	Operational Trajectory
OT	Operational Test
OT	Optical Tracker
OT&E	Operational Test and Evaluation
OTA	Optical Telescope Assembly
OTB	Orbiting  Tanker  Base
OTBD	Outboard
OTC	Orbiter Test Conductor
OTD	Operational Technical Documentation
OTD	Orbiter Test  Director
OTDA	Office of Tracking and Data Acquisition (now OSTDS)
OTEMP	Overtemperature
OTH	Over-the-Horizon (.Radar)
OTK	Oxidizer Tank
OTL	Ordnance Test Laboratory
OTLC	Orbiter Timeline Constraints
OTO	One-Time-Only
OTOS	Orbit-to-Orbit Stage
OTP	Operations Turnaround Plan
OTP	Operations Test Plan
OTP	OPerational Test Procedure
OTR	Outer
OTR	Operating Time Record
OTS	Orbiter Test Conductor
OTS	Off-the-Shelf
OTT	Optional Team Targeting
OTV	Operational Television
OTV	Orbiter Transfer Vehicle
OTV	Orbital transfer vehicle
OTY	Quantity
OUP	OFS  UPlink  Processor
OUT	Orbiter Utilities Tray
OUT	Output
OUT	Outlet
OUTBD	Outboard
OV	Orbiter vehicle
OVBD	Overboard
OVF	Overfill
OVFL	Overf low
OVHD	Overhead
OVHT	Overheat
OVLD	Overload
OVRD	Override
OWD	One-Way Doppler
OWDE	One-Way Doppler Extraction
OWF	OPtimum Working Frequency
OXD	"Oxide, Oxidizer"
OXDZR	Oxidizer
OXID	Oxidizer
OXY	Oxygen
Oil	Operations Integration Instruction
[P]
P&FS	Particles and Fields Subsatellite
P&I	Performance and Interface (Specification)
P&M	Pulse Modulation
P&M	Processes and Materials
P&M	Planetary Mission
P&M	Preventive Maintenance
P&M	Program Milestone
P&M	Performance Monitor
P&M	Phase Modulation (Modulated)
P&R	Performance and Resources
P&SM	Procurement and Subcontract Management
P-P	Peak-to-Peak (Value)
P-TUBE	Pneumatic Tube
P/A	Problem Analysis
P/B	Pushbutton
P/B	Preburner
P/C	Pitch Control
P/L	Payload
P/L	Postlanding
P/L	Parts List
P/L	Purchased Labor
P/N	Part Number
P/P	Patch Panel
P/P	Printer/Plotter
P/PL	Primary Payload
P/S	Payload Specialist
P/S	Parallel to Serial Converters
P/Y	Pitch/Yaw
PA	Pad Abort
PA	Paging and Area Warning
PA	Power Amplifier
PA	Product Assurance
PA	Public Address
PA	Public Affairs
PA	Pulse AmPlifier
PAC	Pressure Alpha Center
PAC	Probe Aerodynamic Center
PAC	Problem Action Center
PACAS	Personnel Access Control Accountability System
PACC	Problem Action Control Center
PACE	Prelaunch Automatic Checkout Equipment
PACS	Pointing and Attitude Control System
PAD	Preliminary Advisory Data (Crew Data Uplink)
PAD	Program   Approval   Document
PAD	Propellant Acquisition Device
PAE	Problem  Assessment  Engineer
PAE	Preventive Action Engineer
PAF	Peak  Annual  Funding
PAF	Payload Attach Fitting
PAF	Payload attach fitting
PAFB	Patrick Air Force Base
PAH	PaYload Accommodations Handbook
PAL APA	Indonesian Communications Satellite
PALS	Photo Area and Location SYstem
PALS	Precision Approach and Landing SYstem
PAM	Pulse Amplitude Modulation
PAM	Payload Assist Module
PAM	Pulse Amplifier Modulation
PAM	Payload assist module
PAM-A	"PAM, Atlas-Centaur Class Spacecraft"
PAM-D	"PAM, Delta Class Spacecraft"
PAMB	Pressure Ambient
PAO	Public Affairs Office (Officer)
PAP	Product Assurance Plan
PAPI	Precision Approach Path Indicator
PAR	Product Acceptance Review
PAR	Problem Action Record
PAR	Precision Approach Radar
PAR	Planning Action Request
PAR	Problem Action Request
PAR	Problem Accountability Record
PARA	Paragraph
PARAM	Parameter
PARS	Property Accountability Record System
PAS	Primary Ascent System
PAS	Payload Accommodation Studies
PASS	Primary Avionics Software System
PASS	Planning and Scheduling System
PASS	Primary avionics software system
PAT	Production Acceptance Test
PAT	Problem Action Team
PATP	Preliminary Authority To Proceed
PATS	Program for Analysis of Time Series
PAU	Probe Aerodynamic Upper
PAV	Pressure Actuated Valve
PAX	Passengers
PAYCOM	Payload Command
PAYDAT	Payload Data
PB	Playback
PB	Preburner (P/B preferred)
PB	Pushbutton
PB	Phonetically Balanced
PB	Playback
PBAN	Polybutadiene Acrylonitrile (Propellant)
PBD	Payload Bay Door
PBDF	Payload Bay Door FWD
PBDM	Payload Bay Door Mechanism
PBI	Push Button Indicator
PBI	Push button indicator
PBIC	Programmable Buffer Interface Card
PBIM	Programmable Buffer Interface Module
PBK	Payload Bay Kit
PBL	Payload Bay Liner
PBM	Program Business Management
PBPS	Post-Boost Propulsion System(s)
PBS	Protective breathing system
PBW	Proportional Band Width
PC	Pulsating Current
PC	Plane Change
PC	Printed Circuit (Card)
PC	Chamber Pressure
PC	Pitch Control
PC	Project Control
PCA	Power Control Assembly
PCA	Point of Closest Approach
PCA	Pitch Control Assembly
PCA	Pneumatic Control Assembly
PCA	Power controller assembly
PCA	Pneumatic control assembly
PCB	Power Circuit Breaker
PCB	Product Configuration Baseline
PCB	Printed Circuit Board
PCB	Power Control Box
PCC	Pad Control Center
PCC	Payload Control and Checkout
PCC	Production Control Centers
PCCB	Program Configuration  Control  Board
PCCE	Payload Common Communication Equipment
PCCM	Program  Change  Control   Management
PCCN	Provisioning Contract Control  Number
PCCP	Preliminary Contract Change  ProPosal
PCD	Procurement Control Document
PCDU	Payload Command Decoder Unit
PCEM	Propulsion Contamination Effects Module
PCF	Payload Control Facility
PCG	Phonocardiogram
PCI	Product Configuration Identification
PCI	Procedure Change Unit
PCI	Program Control Input
PCI	Peripheral Controller Interface
PCIL	Pilot-Controlled Instrument Landing
PCIN	Program Change Integration
PCIN	Program Change Identification  Number
PCL	Primary Coolant Loop
PCL	Pallet Coolant Loop
PCL	Power Control List
PCL	Primary Coolant Line
PCL	Programming Check List
PCM	Pulse Code Modulation
PCM	Power Control Mission
PCM	Punch Card Machine
PCM	Pulse Code Modulator
PCM	Pulse code modulation
PCM   E	Pulse-Code Modulation Event
PCMD	"Pulse-Code Modulation, Digital"
PCMMU	Pulse-Code Modulation Master Unit
PCMMU	PCM Master Unit
PCMMU	Pulse code modulation master unit
PCMS	Pulse-Code Modulation Shared
PCN	Program Change Notice
PCN	Program  Control  Number
PCN	Page Change Notice
PCO	Postcheckout  operations
PCO	Program Controlled Output
PCO	Procuring Contracting Officer
PCO	Postcheckout
PCOT	Payload Center Operations Team
PCP	Project Change Proposal
PCP	Project Cost Plan
PCP	Power Control Panel
PCP	Program Change  Proposal
PCR	Payload  Checkout   Room
PCR	Payload  Changeout  Room
PCR	Publication Change Request
PCR	Project Control Room
PCR	Program  Change  Request
PCR	Power Change Request
PCR	Payload changeout room
PCRB	Operations)
PCRB	Program Change Review Board (RI Launch
PCS	Pointing Control System
PCS	Primary Coolant System
PCS	Pressure Control System
PCS	Payload Control Supervisor
PCS	Payload Checkout  System
PCS	Power Conversion  System
PCS	Procedure Completion Sheet
PCT	Percent
PCTE	Portable Commercial Test Equipment
PCTO	Payload Cost Tradeoff Optimization
PCTR	Pad connection terminal room
PCU	Payload Checkout Unit
PCU	Power Control Unit
PCU	Pressure Control Unit
PCU	Process Control Unit
PCV	Precheck Verification
PCV	Purge Control Valve
PCVB	Pyro Continuity Verification Box
PCVL	Pilot Controlled Visual Landing
PCZ	Physical Control Zone
PD	Propellant Dispersal
PD	Project Directive
PD	Program Directive
PD	Procurement Drawing
PD	Procurement Document
PD	Preliminary Design
PD	Pitch Down
PD&RS	Payload Deployment and Retrieval Subsystem
PDA	Propellant Drain Area
PDAR	Program Description and Requirements
PDB	Power Distribution Box
PDB	Performance Data Book
PDC	Procurement Document Change
PDC	Predefined Command
PDCR	Proprietary Data Control Record
PDCS	Power Distribution and Control System (Subsystem)
PDF	Pocket dosimeter FEMA
PDH	Pocket Dosimeter-High
PDH	Pocket dosimeter high
PDI	Payload Data Interleaver
PDI	Payload DePloyment and Retrieval System
PDL	Pocket Dosimeter-Low
PDL	Procedure Distribution List
PDL	Program Design Language
PDL	Pocket dosimeter low
PDM	Processor Data Monitor
PDM	Pulse Duration Modulation
PDM/FM	Pulse Duration Modulation/Frequency Modulation
PDP	Project Definition Phase
PDP	Plasma Diagnostics Package
PDP	Postinsertion Deorbit Preparation
PDP	Preliminary Definition Plan
PDP	Procurement Data Package
PDP	Program Development Plan
PDR	Preliminary Data Requirements
PDR	Preliminary Design Review
PDR	Processed Data Recorder
PDR	Program Design Review
PDR	Program Director's Review
PDRD	Procurement Data Requirements Document
PDRL	Procurement Data Requirements List
PDRM	Payload Deployment and Retrieval Mechanism
PDRS	Payload Deployment and Retrieval System(s)
PDRS	Payload Data and Retrieval System
PDRS	Payload deployment and retrieval system
PDRSS	Payload Development and Retrieval System Simulator
PDRSTA	Payload Deployment and Retrieval System Test Article
PDS	Power Distribution System (Subsystem)
PDS	Package Data System
PDS	Partitioned Data Set
PDS	Problem Data System
PDU	Pilot Display Unit
PDU	Power Drive Unit
PDU	Pressure Distribution Unit
PDU	Pulse Detection Unit
PDU	Power drive unit
PDV	Pressure Disconnect Valve
PE	Project Engineer
PEAP	Personal egress air pack
PEB	Performance Evaluation Board
PED	Pedal
PED	Pedestal
PEFO	Payload Effects Follow-on Study
PEG	Powered explicit guidance
PEIR	Project Equipment Inspection Record
PEM	Plant Engineering and Maintenance
PEN	Penicillin
PEP	Power Extension Package
PER	Perigee
PER	Period
PER	Preliminary Engineering Report
PERF	"Perform, Performance"
PERM	Permanent
PERT	Program Evaluation Review Technique
PET	Phase Elapsed Time
PETA	Performance Evaluation and Trend Analysis
PETB	Preflight Test Bus
PETN	Petaerythrite Tetranitrate
PETS	POCC Experiments Timeline System (GDSD and Spacelab
PETS	P/L Experiment Test System (KSC)
PETS	Payload Environmental Transportation System
PF	Payload     Forward
PF	Payload Operational Instrumentation MDM-FWD
PF	Parachute  Facility
PF	Payload    Function
PF	Power Factor
PF	Powered   Flight
PF	Preflight
PF	Prime   Function
PF	Probability of Failure
PF	Pulse Frequency
PFA	Palmdale Final Assembly
PFB	Pressure Fed Booster
PFB	Position   Feedback
PFB	PaYload Forward Bus
PFB	Payload    Feedback
PFC	Preliminary Flight Certification
PFC	Performance Flight Certification
PFC	Postflight Checklist
PFC	Power Factor Corrector
PFCF	Payload Flight Control Facility
PFCS	Primary Flight Control System
PFK	Payload Function Key
PFL	Primary Freon  Loop
PFM	Pulse Frequency Modulation
PFM	Platform
PFP	Prograin Financial Plan
PFP	Programmable Function Panel
PFR	Portable Foot Restraint
PFRT	Preliminary Flight Rating Test
PFRX	"Preflight Relmat (X- 1,2,3 ... 9 or A,B,C. . Z)"
PFS	Primary Flight System
PFS	Percent Full Scale
PFTA	PaY[oad Flight Test Article
PG	Pressure Gage
PG	Power Generation
PGA	Power Generating Assembly
PGA	Pressure Garment Assembly
PGA	Programmable Gain Amplifier
PGDCS	"Power Generation, Distribution, and Control"
PGDCS	Subsystem
PGE	Purge
PGHM	Payload Ground Handling Mechanism
PGHM	Payload ground handling mechanism
PGM	Program (able)
PGNCS	Primary G&N and Control System (Subsystem)
PGOR	Payload Ground Operation Requirements
PGORS	Payload Ground Operations Requirements Study
PGR	SPacelab Planning and Ground Rule
PGRWG	Payload Ground Requirements Working Group
PGS	Power Generation Subsystem
PGSE	Payload Ground Support Equipment
PGU	Plant Growth Unit
PGWG	Particles and Gasses Working Group
PH	Personal Hygiene
PH	Phase
PHA	Preliminary Hazard Analyses
PHF	Personal Hygiene Facility
PHF	Payload handling fixture
PHK	Personal Hygiene Kit
PHM	Per Hundred Million
PHMC	Probe Heater Motor Controller
PHOTO	Photograph
PHP	Payload Handling Panel
PHR	Payload Hazardous Report
PHS	Payload Handling Station
PHSF	Payload Hazardous Servicing Facility
PI	Payload interrogator
PIA	Project Impact Analysis
PIA	Preinstallation Acceptance
PIAR	Project Impact Analysis Report
PIB	Pyrotechnic Installation Building
PIC	Programmable Interval Clock
PIC	Preinstallation Checkout
PIC	Payload Integration Committee
PIC	Pyro Initiator Capacitors
PIC	Pyro  Ignition  Control
PIC	Pyro Initiator Controller
PIC	Pyrotechnic Initiator Controller
PIC	Payload Integration Center
PIC	Pyro initiator controller
PICP	Program Interface Control Plan
PICRS	Program Information Coordination and Review
PICRS	Service
PICRS	Program Information Control and Retrieval System
PICS	Predefined Input Control Sequence
PICS	Photo Index and Cataloging System
PID	Payload Insertion Device
PID	Program Information Document
PID	Program Introduction Document
PIDA	Payload Installation and Deployment Aid
PIDS	Portable Image Display System
PIE	P/L Integration Equipment
PIECP	Preliminary Impact Engineering Change Proposal
PIF	Payload Integration Facility
PIGA	Pendulous Integrating Gyro Accelerometer
PIIN	Procurement Instrument Identification Number
PIM	Pulse Interval Modulation
PIND	Particle Impact Noise Detection
PIO	Payload Integration Plan
PIO	Pilot-Induced Oscillation
PIO	Public Information Office
PIP	Payload Integration Plan
PIP	Payload Interface Plan
PIP	Plant Instrumentation Program
PIP	Production Instrumentation Package
PIP	Project Implementation Plan
PIPA	Pulse Integrating Pendulum Assembly
PIPA	Pulse Integrating Pendulum Accelerometers
PIRN	Preliminary Interface Revision Notice
PIT	Preinstallation  Test
PITG	Payload Integration Task Group
PITS	Payload Integration Test Set
PIU	Power Interface Unit
PIU	Pyrotechnic Initiator Unit
PIV	Peak Inverse Voltage
PK	Peak (Valve)
PK/PK	Peak to Peak
PKD	Programmable Keyboard and Display
PKG	Package
PKM	Perigee  Kick   Motor
PKT	Pocket
PL	Postlanding (P/L preferred)
PL	Prelaunch
PL	Plate
PL	Plug
PL	Payload (P/L preferred)
PL	Payload
PL/SNSR	Payload Sensor
PLA	Parachute Location Aid
PLACE	Position Location Aircraft Communications
PLACE	Equipment
PLAT	Platform
PLB	Payload Bay
PLB	Payload bay
PLBD	Payload  BaY  Door(s)
PLBK	Playback (PB preferred)
PLD	Program Listing Document
PLDI	Payload Data Interleaver
PLDM	Payload    Management
PLDS	Payload Support
PLGSS	Payload Ground Support Systems
PLH	Payload Handling
PLI	Payload Interrogator
PLISN	Provisioning List Item Sequence Number
PLL	Phase Locked Loop
PLM	Payload    Management
PLM	Payload Monitoring
PLMS	Program Logistics Master Schedule
PLN	Plan
PLN	Program Logic Network
PLRD	Payload Requirements Document
PLRV	Payload Launch Readiness Verification
PLS	Propellant Loading System
PLS	Payload Systems
PLS	Post Landing and Safing
PLS	Preliminary Landing Site
PLS	Primary Landing  Site
PLSL	Propellants and Life Support Laboratory
PLSP	Payload Signal  Processor
PLSP	Payload signal processor
PLSS	Portable Life Support Subsystem
PLSS	Primary Life SuPport Subsystem
PLSS	Portable life support system
PLT	Pilot
PLTS	Precision Laser Tracking System
PLUM	Payload Umbilical Mast
PLV	Postlanding Vent
PLVC	Postlanding Vent  Control
PM	Preventive Maintenance
PM	Project Manager
PM	Payload Management
PM	Performance Monitor
PM	Phase Modulation
PM	PMAT          Page Map Address Table
PM	Payload Midbody
PM	Pulse Modulation
PM	PMA          Performance Monitor Annunciator
PM	PMAD          Performance Monitor Annunciation Driver
PM	Power Management and Distribution
PM	PMAP          Performance Monitor Annunciation Panel
PM	"Phase modulation, phase modulated"
PMC	Procurement  Method  Code
PMC	Payload Monitoring and Control
PMC	Plutona-Molybdenum Cermet
PMC	Postmanufacturing Checkout
PMC	Private Medical Communication
PMD	Palmdale (TACAN  Station)
PMD	"PMDL          Palmdale, California"
PMEL	Precision Measurements Equipment Laboratory
PMF	Performance Monitor (Monitoring) Function
PMF	Perigee Motor Firing
PMF	Program Management Facility
PMHL	Preferred Measurement Hardware List
PMI	Preventive Maintenance Inspection
PMI	Preventive Maintenance Instruction
PMI	Principal Maintenance Inspector
PMIA	Parallel Multiplexer Interface Adapter
PMIR	Program Manager's Integration Review
PMIS	Personnel Management Information System
PML	Preliminary Materials List
PMM	Property Management Manual
PMN	Program Management Network
PMOM	Performance Management Operations Manual
PMON	Performance Management Operations Network
PMP	Premodulation Processor
PMP	Performance Management Package
PMP	Pump
PMP	Program  Management   Plan
PMP	"Parts, Materials, and Processes"
PMPL	Preferred Mechanical Parts List
PMR	Performance Measurement Report
PMR	Program  Manager's  Review
PMS	Performance Monitoring System
PMS	Performance Management System
PMS	Performance Measurement System
PMT	Production Monitoring Test
PMT	Planning/Management   Team
PMTC	Pacific Missile Test Center
PMU	Pulse Modulation Unit
PMU	PCM Master Unit
PMU	Pressure Measuring Unit
PN	Part Number (P/N preferred)
PN	Pseudo Noise
PN	Pseudo-Random Noise
PNEU	Pneumatic
PNL	Panel
PNP	Prenegotiation  Position
PO	Personnel Office (KSC Directorate)
PO	Postorbit
PO	Purchase   Order
POA	Plan  of  Action
POCC	Payload Operations Control Center
POCC	Payload Operations Control Center
POCN	Purchase Order Change Notice
POD	Payload Operations Division (JSC)
POE	Proximity OPticai Device
POGO	Polar Orbiting GeophYsical Observatory
POGO	P090 Suppression System
POGO	Pilot Operational EquiPment
POI	Propellant Quantity Indicator
POI	Product of Inertia
POL	"Petroleum, Oil, and Lubricants"
POLAR	Production Order Location and Reporting
POM	Pallet-Only Mode
POM	Printer OutPut Microfilm
POMT	Planning Operations Management Team
POP	Program Operating Plan
POP	Perpendicular-to-Orbit Plane
POP	Preburner Oxidizer  Pump
POP	Preflight Operations Procedures
POP	Prelaunch Operations Plan
POPA	PaYload Ordnance Processing Area
POPU	Push Over Pull Up
POR	Purchase Order Request
POR	Point of resolution
PORB	Production Operations Review Board
PORCN	Production Oi-der Records Change Notice
PORD	Performance and 0iperations Requirements Document
PORR	Preliminary Operat ons Requirements Review
PORT	Portable
POS	Pacific Ocean Ship
POS	Position
POS	Portable Oxygen System
POS	Portable oxygen system
POST	Program to OPtimize Simulated Trajectories
POST	Positive
POST	Payload Operations SuPport Team
POT	Potentiometer
POT	Potable
POV	Pneumatic Operated Valve
POV	Peak Operating Voltage
POWS	Project Operating Work Statement
PPB	Program Performance Baseline
PPB	Parts per Billion
PPC	Phased Provisioning Code
PPC	PreProcessing Center
PPCO2	Partial Pressure CO2
PPEP	Plasma Physics and Environmental Perturbation
PPF	Payload Processing Facility (USAF)
PPH	Pounds per Hour
PPI	Plan Position Indicator
PPI	Pulse Position Indicator
PPIL	Priced Provisioned Item List
PPL	Provisioning Parts List
PPL	Priced Parts List
PPL	Planning Parts List
PPM	Parts per Million
PPM	Part per Minute
PPM	Pulse per Minute
PPM	Pulse Position Modulation
PPM E	Pacific Plate Motion Experiment
PPO2	Partial Pressure 02
PPO2	Oxygen partial pressure
PPP	Payload patch panel
PPR	Payload Preparation Room
PPS	Pneumatic Power Subsystem
PPS	Printer/Plotter System
PPS	Provisioning Performance Schedule
PPS	Pulse Per Second
PQGS	Propellant Quantity Gaging System
PR	Procurement Requisition
PR	Pressure   Regulator
PR	Procurement Regulation
PR	Purchase Request
PR	Pressure
PR	Pulse   Rate
PR	Problem    Report
PR	Pressure   Ratio
PR	Primary
PR	Position   Record
PR	Pair
PR	Performance Report
PRACA	Problem Reporting and Corrective Action
PRB	Parachute Refurbishment Building
PRB	Project Review Board
PRB	Paso   Robles   (TACAN   Station)
PRB	Panel Review Board
PRC	People's   Republic of China Satellite
PRC	People's   Republic  of  China  (Payload)
PRC	Planning   Research   Corporation
PRCA	Problem    Reporting and Corrective Action
PRCB	Program    Requirements   Change    Board
PRCB	Program    Requirements   Control    Board
PRCB	Program    Review  Control  Board
PRCBD	Program    Requirements   Control Board Directive
PRCBD	Program    Review  Control  Board Directive
PRD	Program Requirements Documents (UDS)
PRD	Procurement Regulation Directive
PRD	Personal   Radiation Dosimeter
PRD	Procurement     Requirements     Document
PRE	Personal Rescue Enclosure
PRE-MOD	Premodulation
PREAMP	Preamplifier
PREF	Preference
PREFLT	Preflight
PREL	Preliminary
PREP	Preparation
PREP	Prepare
PRES	Present
PRESS	Pressure
PRESS	Pressurant
PREV	Previous
PREVLV	Prevalve
PRF	Parachute Refurbishment Facility
PRF	Pulse Repetition Frequency
PRI	Primary
PRIM	Primary
PRL	Priority Rate Limiting
PRL	Page Revision Log
PRL	Priority rate limiting
PRM	Pulse Rate Modulation
PRM	Posigrade Rocket Motor
PRM	Payload Retention Mechanism
PRN	Program Release Notice
PRN	Pseudo-Random Noise
PRN	Pulse Range Navigation
PRO	Proceed
PROB	Problem
PROC	Procurement
PROC	Procedure
PROC	"Processor, Process"
PROG	Progress
PROG	Program
PROJ	Project
PROM	Programmable Read-Only Memory
PROM	Progammable read-only memory
PROP	Propulsion Engineer
PROP	Propulsion
PROP	Proportioning
PROP	Propellant
PROPLT	Propellant
PROX	Proximity
PRP	Personnel Reliability Program
PRPS	Programming Requirements Process Specification
PRR	Pulse Repetition Rate
PRR	Program Requirements Review
PRR	Parts Replacement Request
PRR	Preliminary Requirements Review
PRS	Personnel Rescue Service
PRS	Personnel Rescue System
PRS	Power Reactant System (Subsystem)
PRS	Payload Retention Subsystem
PRS	Primary   Recovery   Site
PRS	Primary Rescue Site
PRS	Precision Ranging System
PRS	Provisioning Requirements Statement
PRSD	Power Reactant Supply and Distribution
PRSD	Power Reactant Storage and Distribution
PRSD	Power reactant storage and distribution
PRSDS	Power Reactant Storage and Distribution System
PRSS	Problem Report Squawk Sheet
PRT	Pulse   Repetition   Time
PRTLS	Powered Return to Launch Site
PRV	Pressure Reduction Valve
PS	Payload Station
PS	Payload Support
PS	Power Supply
PS	Pressure Switch
PS	Prime Select
PS	Payload Specialist
PS	Parachute Subsystem
PS/FC	Power Supply/Fuel Cell
PSA	Pre/Post  Sleep  Activity
PSA	Preferred  Storage   Area
PSA	Pressure Switch Assembly
PSA	Provisions Stowage Assembly
PSA	Power   Servo    Assembly
PSA	Payload Support Avionics
PSA	Payload Service Area
PSA	Power Servo Am pl if  ier
PSAC	Presidential Scientific Advisory Committee
PSC	Parallel  Switch  Control
PSC	Program Schedule Chart
PSCL	Propellant Systems Cleaning Laboratory
PSCN	Preliminary Specification Change Notice
PSD	Program Support Document
PSD	Power  Spectral   Density
PSD R	Planning and Scheduling Document Record
PSDP	Payload Station Distribution Panel
PSE	Payload Support Equipment
PSE	Peculiar Support Equipment
PSE	Payload Service Equipment
PSE	Payload Servicing Equipment
PSF	Processing and Storage Facility (ET)
PSF	Processing and Staging Facility (SRB)
PSFC	Power Supply/Fuel Cell
PSG	Power Subsystem Group
PSI	Power Static Inverter
PSIG	Propulsion Systems Integration Group
PSK	Phase Shift Keyed
PSL	Propellant Seal
PSL	Pressure Seal
PSM	Propellant Storage Module
PSM	Phase Sensitive Modulator
PSM	Pyro Substitute Monitor
PSOP	Payload Systems Operating Procedures
PSP	Project Schedule Plan
PSP	Program Support Plan
PSP	Payload Signal Processor
PSP	Payload Specialist Panel
PSP	Payload Support Plan
PSP	Payload signal processor
PSPA	Pressure Static Probe Assembly
PSPL	Priced Spare Parts List
PSR	Program Status Review
PSRD	Program Support Requirements Document
PSS	Propulsion Support System
PSS	Pad Safety Supervisor
PSS	Payload Specialist Station
PSS	Payload Support System
PSS	Propellant Supply Subsystem
PSSP	Payload Specialist Station Panel
PSST	Periodic Significant Scheduled Tasks
PSSU	Patch Survey and Switching Unit
PSU	Power Switching Unit
PSV	Planetary Space Vehicle
PSW	Program Status Word
PT	Advanced Planning and Technology Office (KSC Dir.)
PT	Pint
PT	Pitch Trim
PT	Point
PT	Pressure Transducer
PTA	Propulsion Test Article
PTA	Positest Analysis
PTA	Potential Toxic Area
PTB	Payload Timing Buffer
PTC	Portable Temperature Controller
PTC	Passive Thermal Control
PTC	Passive thermal control
PTC R	Pad Terminal Connection Room
PTCS	Passive Thermal Control Section
PTCS	Passive Thermal Control System
PTCS	"Planning, Training, and Checkout System"
PTCS	Propellant Tanking Computer System
PTD	Provisioning Technical Documentation
PTDDSS	PTD Data Selection Sheet
PTI	Preliminary Test Information
PTI	Programmed Test Input
PTIS	Program Test Input System
PTM	Pulse Time Modulation
PTMS	Precision Torque Measuring System
PTO	Participating Test Organizations
PTO	Power Test Operations
PTP	Point-to-Point Phone(s)
PTR	Preliminary Test Report
PTR	Printer
PTR	Program Trouble Report
PTS	Payload Transportation System
PTS	Payload Test Set
PTT	Push-to-Talk
PTT	Push to talk
PTV	Pathfinder Test Vehicle
PU	Propellant Unit
PU	Pickup
PU	Power Unit
PU	Propellant Utilization
PUB	Publication
PUCS	Propellant Utilization Control System
PUGS	Propellant Utilization and Gaging System
PUPO	Pull Up Push Over
PUSS	Pallet Utility Support Structure
PUV	Propellant Utilization Valve
PV	Prevalve
PV&D	"Purge, Vent, and Drain"
PVA	Preburner   Valve   Actuator
PVA	Propellant Valve Actuator
PVD	"Purge,  Vent,  Drain  System"
PVR	Precision Voltage Reference
PVRD	"Purge, Vent, Repressurize, and Drain"
PVRO	Pyrotechnics
PVT	Preflight Verification  Test
PVT	"Pressure, Volume, and Temperature"
PVT	Pressure/Volume/Temperature
PVT	Private
PVT	Pyrotechnic Verification Test
PVWA	Planned Value of Work Accomplished
PVWS	Planned Value of Work Scheduled
PW	Pulse Width
PWA	Private Write Area
PWA	Pratt and  Whitney  Aircraft
PWA	Product Work Authorization
PWB	Printed Wire Board
PWBS	Program Work Breakdown Structure
PWM	Pulse-Width Modulation
PWMD	Printed Wiring Master Drawing
PWR	Power
PWS	Pricing Work Statement
PYRO	Pyrotechnics
Pc	Chamber pressure
Perigee  Al	Perigee  Altitude
Pi	Procurement Item
Pi	Program Introduction
Pi	PaYload Interrogator
Pi	Pen and Ink (Document Update)
Pi	Principal Investigator
Pi	Preliminary Investigation
Pil	Procurement Instrument Identification
Poc	Purchase Order Closeout
Poc	PaYload Operations Center
[Q]
Q	Dynamic Pressure
Q	Pitch Rate (Angular Rate)
Q Alpha	Pitch Dynamic Pressure
Q Beta	Yaw Dynamic Pressure
QA	Quality Assurance
QACAD	Quality Assurance Corrective Action Document
QAM	Quality Assurance Manual
QAP	Quality Assurance Procedure
QAR	Quality Assurance Responsible/Witness
QATT	Qualification for Acceptance Thermal Testing
QAVT	Qualification for Acceptance Vibration Testing
QAVT	Qualification Acceptance Vibration Test
QCB	Queue Control Block
QCDR	Quality Control Deficiency Report
QCOP	Quality Control Operating Procedure
QD	Quick Disconnect
QD	Quick disconnect
QDR	Qualification Design Review
QDS	Quality Data System
QE	Quality Engineer
QEC	Quick Engine Change
QL	Quick Look
QLDS	Quick Look Data Station
QLS	Quick Look Station
QM	Qualification Motor
QPL	Qualified Products List
QPL	Qualified Parts List
QPR	Quarterly Progress Report
QPRD	Quality Planning Requirements Document
QPS	Quality Planning Specification
QPS	Quantity Planning Specification
QPSK	Quadrature Phase Shift Key
QRE	Quick-Reaction Estimate
QRI	Quick-Reaction Integration
QRIA	Quick-Reaction Integration Activity
QRS	Quick-Reaction Sortie
QRSL	Quick-Reaction Space Laboratory
QSA	Qualification Site Approval
QSGVT	Quarter Scale Ground Vibration Test
QSL	Qualified Source List
QSM	Quarter Scale Model
QSMVT	Quarter Scale Model Vibration Testing
QSS	Quindar Scanning System
QT	Qualification Test
QTP	Qualification Test Plan
QTR	Qualification Test Report
QTR	Quarter
QTRS	Quarters
QUAD	"Quandrangle, Quadrant, Quadrature"
QUADS	QualitY Achievement Data SYstem
QUAL	Quality
QUAL	"Qualification, Qualified"
QUAT	Quaternion
QUIC	Quality Data Information and Control
QUP	Quality Unit Pack
QVT	Qualified Verification Testing
QVVT	Qualified Verification Vibration Testing
[R]
R	Rankine
R	Rear
R	Receive
R	Range Rate
R	Roentgen
R	Replace
R	Resistance
R	Yaw Rankine Rate
R	Roll
R	Gas Constant
R	Radius
R	Range
R	Rehydratable
R	Regulate
R	Ratio
R	Right
R	Reliability
R	Redundant
R   LEO	Request Liaison Engineering Order
R   LSS	Regenerative Life Support System
R BAR	Radius Vector Axis
R DOT	"Range Rate to Target, Opening, Closing"
R ETS	Reconfiguration Electrical Test Stand
R ETS	Reconfigurable Electrical Test Stand
R IMP	Minimum Range to Avoid Plum Impingement
R&CC	Recorder and Communication Control
R&D	Research and Development
R&DO	Research and Development Operations (MSFC)
R&OA	Reliability and Quality Assurance
R&P	Reserve and Process
R&PM	Research and Program Management
R&R	Remove and Replace
R&R	Rendezvous and Recovery
R&Z	Range and Zero
R-T	Resistance Test
R/A	Radar Altimeter
R/C	Remote Control
R/C	Rate of Climb
R/C	Radio Command
R/D	Rate of Descent
R/E	Reentry
R/I	Receiving Inspection
R/L	Rate/Limited
R/L	Remote/Local
R/O	Rollout
R/S	Redundant   Set
R/S	Range Safety
R/T	Receiver/Transmitter
R/T	Real Time
R/W	Runway
R/W	Read/Write
RA	Right Ascension
RA	Right Aft
RA	Range Area
RA	Radar Altimeter (R/A preferred)
RA	Radar altimeter
RAAB	Remote Amplifier and Adoption Box
RAAB	Remote Application and Advisory Box
RAAB	Remote amplifier acquisition and advisory box
RAC	ReliabilitY Action Center
RACS	"Rotation Axis Coordin,,te System"
RACS	Remote Automatic Calibration System
RACU	Remote Acquisition and Command Unit
RAD	Radar
RAD	Radian
RAD	Roentgen Absorbed Dosage
RAD	Radius
RAD	Radiation Dosage
RADAR	Radio Detecting and Ranging
RADCC	Radiation Control Center
RAE	Radio Astronomy Explorer
RAF	Requirements Analysis Form
RAG	Reusable Agenda
RAHF	Research Animal Holding Facility
RAI	Rofl Attitude Indicator
RAI	Radar Altimeter Indicator
RAL	ResPonsibiiitV Aslignment List
RALPH	Reduction and Acquisition of Lunar Pulse Heights
RALT	Radar Altimeter
RAM	Random Access Memory
RAM	Responsibility Assignment Matrix
RAM	Research and Applications Module
RAM	Radar Absorption Material
RAM	Random-access memory
RAMA	Recap and Movement Authorization
RANC	Radar Absorption Noise and Clutter
RANN	Research Applied to National Needs
RAPCON	Radar Approach and Control
RAPS	Right AFT Propulsion System
RAS	Requirements Allocation Sheet
RATCC	Radar Air Traffic Control Center
RAU	Remote Acquisition Unit
RAU	Remote acquisition unit
RAUIS	Remote Acquisition Unit Interconnecting Station
RAX	Remote Access Terminal
RAX	Remote Access Computing System
RB	Radar Beacon
RBA	Radar Beacon Antenna
RBC	Red Blood Cells
RBC	Rotating Beam Ceilometer
RBDE	Radar Bright Display Equipment
RBE	Radiation Biological Effectiveness
RBK	Right Bank
RBL	Right Buttock Line
RBMT	Retrospective BibliographieS on Magnetic Tape
RBN	Radio Beacon
RC	Reverse Current
RC	Recurring Cost
RC	Rotation Control
RC	Resistance-Capacitance
RC	Range Command
RC	Rate Command
RC	Recovery Controller
RCA	Remote Control Amplifier
RCA	Radio Corporation of America (SATCOM)
RCAG	Remote Center Air-Ground
RCAG	Remote Control Air-Ground
RCB	Remote Circuit Breaker
RCC	RoLigh Combustion Cutoff
RCC	Reusable Carbon-Carbon
RCC	Reinforced Carbon-Carbon
RCC	Range Control Center
RCC	Range Commanders Council (DOD)
RCC	Reinforced carbon-carbon
RCCA	Rough Combustion Cutoff Assembly
RCCB	Remote Control Circuit Breaker
RCCP	Recorder and Communications Control Panel
RCD	Record
RCDP	Record Parallel
RCDR	Recorder
RCHCS	Regenerable CO and Humidity Contro SYstem
RCN	Requirements Change Notice
RCP	Right Circular Polarization
RCP	Radiation Constraints Panel
RCP	Right Circular Polarizer
RCPT	Receipt
RCPT	Receptacle
RCR	Retrofit Configuration Record
RCS	Reaction Control System (Subsystem)
RCS	Reaction control system
RCSC	Reaction Control subsystem Controller
RCU	Remote Control Unit
RCV	Receive
RCVR	Receiver
RCVS	Remote Control Video Switch
RCVY	Recovery
RCY	Remaining CYcles
RCY	Recovery
RD	Round
RD	Requirements Document
RD	Radiation Detection
RD	Reference Designator
RD/SB	Rudder Speed Brake
RDA	Remote Data Access
RDA	Resident Data Area
RDC	Request for Document Change
RDC	Reference Designator Code
RDCS	Reconfiguration Data Collection SYstem
RDD	Requirements Definition Document
RDF	Resource Data File
RDF	Radio Direction Finder
RDM	Real-Time Data Manager
RDMTR	Radiometer
RDOC	Reference Designation Overflow Code
RDOUT	Readout
RDP	Requirements Data Plan
RDP	Requirements Development Plan
RDP	Receiver and Data Processor
RDR	Rudder
RDR	Raw Data Recorder
RDS	Rocketdyne Digital Simulator
RDT&E	"Research, Development, Test, and Evaluation"
RDTR	Radiator
RDW	Return Data Words
RDW	Response Data Word
RDX	Cyclotrimethylenetrinitramine
RDY	Ready
RE	Responsible Engineer
RE&T	Research Engineering and Test
REAC	Reactant
REACQ	Reacquisition
REC	Record (RCD preferred)
REC	Receive
RECERT	Recertification
RECHG	Recharge
RECIP	Reci procate
RECOG	Recognition
RECON	Remote Console
RECONFIG	Reconfiguration
RECONN	Reconnaisance
RECOV	Recovery
RECP	Request for Engineering Change Proposal
RECP	Receptacle
RECRC	Recirculate
RECS	Representative Shuttle Environmental Control System
RECT	"Rectifier, Rectify"
RECV	Receive
RECVR	Receiver
RED	Reduction
REDUN	Redundancy
REF	"Refurbish, Refurbishment"
REF	Reference
REFRIG	Refrigerate
REFURB	Refurbish
REG	"Regulator, Regulate"
REG	Register
REGEN	Regenerate
REI	Range from Entry Interface (400 K)
REI-N4	REI-N4011ite        cation
REIL	Runway End Identification Lights
REINF	Reinforce
REINIT	Reinitialize
REJ	Reject
REL	Relative
REM	Release Engine Module
REM	Release Escape Mechanism
REM	Release Engine Mechanism
REM	Release-Engage Mechanism
REN RAD	Rendezvous Radar
REND	Rendezvous
REO	Require
REO	Request
REOD	Required
REPL	Replace
REPR	Repressurization
REPRO	Reproduction
REQN4TS	Requirements (RQN4TS preferred)
RES	Reservoir
RES	Reserve
RESID	Residual
RESIS	Resistance
RESP	Responsibility
RESVR	Reservoir
RET	Retract
RETEN	Retention
RETRO	Retrofire
RETRO	Retrofire Officer
RETRO	Retro Controller (NASA)
RETRV	Retrieve
REV	Revision
REV	Revolution
REV	Review
REV	Reverse
RF	Communications Support
RF	Radio Frequency
RF	Right Forward
RF	Radio frequency
RF-TK	Radio Frequency Tracking
RFA	RF Authorization (Frequency)
RFA	Request for Action
RFB	Request for Bid
RFB	Ready for Baseline
RFC	Request for Change Revolution
RFC	Request for Change
RFC	Radio Frequency Charts
RFCP	Request for Computer Program
RFD	Requirements Formulation Document
RFE	Request for Estimate
RFEI	Request for Engineering Information
RFI	Remote Facility Inquiry
RFI	Request for Information
RFI	Remote File Inquiry
RFI	Radio Frequency Interference
RFL	Reflect
RFO	Request for Order
RFP	Requirements and Formulation Phase
RFP	Request for Proposal
RFPA	Request for Proposal Authorization
RFQ	Request for Quotation
RFT	Ready for Training
RFW	Request for Waiver (Deviation)
RG	Radio Guide
RG	Rate Gyro
RGA	Rate Gyro Assembly
RGA	Rate gyro assembly
RGAL	Rate Gyro Assembly-Left SRB
RGAO	Rate Gyro Assembly-Orbiter
RGAR	Rate Gyro Assembly-Right SRB
RGM	Redundant Gyro Monitor
RGP	Rate Gyro Package
RGRMA	Rate Gyro Redundancy Management Algorithm
RH	Relative Humidity
RH	Right Hand
RHC	Rotation Hand Controller
RHC	Right Hand Circular
RHC	Rotational hand controller
RHCM	Relative Humidity Control/Monitor
RHCP	Right Hand Circular Polarization (Polarized)
RHEB	Right Hand Equipment Bay
RHEO	Rheostat
RHFEB	Right Hand Forward EquiPment Bay
RHL	Residual Hazards List
RHM	Relative Humidity Monitor
RHP	Right Hand Panel
RHS	Right Hand Side
RHS	Rocketdyne Hybrid Simulator
RHSC	Right Hand Side Console
RHT	Radiant Heat Temperature
RHU	Radioisotope Heater Unit
RHW	Router Header Word
RIB	Recoverable Item Breakdown
RIB	Right Inboard
RIC	Rockwell International Corporation
RIC	Resistance Inductance and Capacitance
RICC	Remote Intercomputer Communications Interface
RID	Review Item DisPosition
RIDI	Receiving Inspection Detail Instruction
RIE	Right Inboard Elevon
RIF	Relative Importance Factor
RIG	Rate Integration Gyro
RIGI	Receiving Inspection General Instruction
RIL	Reparable   ltemlist
RIL	Repairable Item List
RIL	Recoverable Item(s) List(s)
RIPS	Radar Impact Prediction System
RIR	Reportable Item Report
RIS	Reporting Identification Symbols
RISKAC	Risk Acceptance
RIT	Request for Interface Tool
RIU	Remote Interface Unit
RIV	Recirculation Isolation Valve
RJ/EC	Reaction Jet/Engine Control
RJC	Reaction Jet Control
RJD	Reaction Jet Device
RJD	Reaction Jet Driver
RJD	Reaction jet driver
RJDA	Reaction  Jet Driver Aft
RJDF	Reaction Jet Driver Forward
RJEC	Reaction Jet Engine Control
RJOD	Reaction Jet OMS Driver
RK	Recharge
RL	Return link
RLA	Repair Level Analysis
RLA	Repair Line Agreement
RLC	Remote Load Controller
RLF	Relief
RLG	Ring Laser Gyro
RLT	Return Line Tether
RLY	Relay
RM	Right Mid
RM	Reference Mission
RM	Rendezvous Maneuver
RM	Remote   Manipulator
RM	Rescue  Module
RM	Redundancy Management
RM	Redundancy management
RM/MS&c	Control
RM/MS&c	"Redundancy Management/Moding, Sequencing, and"
RMA	Renote Manipulator Arm
RMC	Redundancy Management Control
RMF	RCS Module Forward
RMG	Right Main Gear
RMRS	Repeatable Maintenance and Recall System
RMS	Radian Means per Second
RMS	Redundancy Management System
RMS	Remote ManiPulator System (SubsYstem)
RMS	Random Motion Simulator
RMS	Root-Mean-Square
RMS	Remote manipulator system
RMSVp	Remote ManiPulator SubsYstem Verification Plan
RMT	Remote
RMi	Radio Magnetic Indicator
RN	Reynolds Number
RNDZ	Rendezvous
RNG	Range
RNG RT	Range Rate
RO	Readout
RO	Recovery Operations
RO	Receive Only
RO	Radar Operator
ROB	Right Outboard
ROC	Record Of Comments
ROC	Request of Change
ROD	Remote Operated Door(s)
ROLL	Roll Angle
ROM	Rough Order of Magnitude
ROM	Read-Only Memory
ROS	Regulated Oxygen SYstem
ROS	"Rosman, North Carolina (STDN Site)"
ROS	Removable Overhead Structure
ROS	Regulated Oxygen Supply
ROT	"Rotate, Rotation"
ROT	Remaining Operating Time
ROTI	Recording Optical Tracking Instrument
ROUT	Rollout
RP	Relative Pressure
RP	Rocket  Propellant
RP	Repair Period
RPA	Request for Procurement Action (Authorization)
RPA	Record and Playback Assembly
RPC	Remote Power Controller
RPC	Remote power controller
RPE	Reliability Project Engineer
RPIE	Real Property Installed  Equipment
RPL	Rated Power  Level
RPL	Rated power level
RPLC	Replace
RPM	Revolutions per Minute
RPO	Radiation Protection Officer
RPOC	Remote Payload  Operations  Center
RPP	Reinforced Pyrolytic Plastic
RPS	Record and Playback System (Subsystem)
RPS	Revolutions per Second
RPSF	"Rotation, Processing and Surge Facility"
RPT	Rudder Pedal Transducer
RPT	Resident Provisioning Team
RPTA	Rudder Pedal  Transducer  Assembly
RPTA	Rudder pedal transducer assembly
RPV	Remotely Piloted Vehicle
RQ	Respiratory Quotient
RQMT	Requirement
RQMTS	Requirements
RR	Respiration Rate
RR	Requirements Review
RR	Rendezvous   Radar
RR	Range Rate
RREA	Rendezvous Radar Electronics Assembly
RREU	Rendezvous Radar Electronics  Unit
RRI	Rendezvous Radar Indicator
RRL	Rudder Reference Line
RRP	Rudder Reference Plane
RRT	Rendezvous Radar Transducer
RRT	Rendezvous Radar Transponder
RS	Rawinsonde
RS	Redundancy  Status
RS	Redundant Set
RS	Right Side
RS	Remote Station
RS	Refurbishment Spare
RS	Redundant set (computers)
RS&H	"Reynolds, Smith, & Hills, Inc."
RS&S	"Receiving, Shipping, and Storage"
RSA	Reference Satellite  A
RSB	Rudder   Speed   Brake
RSC	Range Safety Control/Command
RSCIE	Remote Station Communication Interface Equipment
RSD	Requirements and Specifications Document
RSDP	Remote Site Data Processor
RSF	Receiving-Safing Facility
RSF	Refurbishment and Subassembly Facilities
RSF	Refurbishment and Subassembly Facility (KSC)
RSI	Reusable Surface Insulation
RSL	Resource Support List
RSLV	Resolve
RSM	Resume
RSMM	Redundant System Monitor Model
RSO	Radiological Safety Office
RSO	Range  Safety  Officer
RSP	Rendezvous Station Panel
RSPL	Recommended Spare Parts List
RSS	Root Sum Square
RSS	Range  Safety   Switch
RSS	Range  Safety   System
RSS	Reactants Supply System
RSS	Rib Structure  Station
RSS	Rotating Service Structure
RSS	Range safety system
RSS	Rotating service structure
RSSPO	Resident Space Shuttle Project Office (Officer)
RST	Recessed Selectromatic Terminal
RSTRT	Restart
RSU	Remote  Service   Unit
RSVR	Reservoir
RSYS	Responsible     System
RT	Receiver-Transmitter
RT	Right
RT	Reference   Trajectory
RT	Real Time (R/T preferred)
RT	Rate
RT	Range-to-Target
RTA	Real-Time Accumulator
RTAC	Research and Technology Advisory Committee
RTB	Resistance Temperature Bulb
RTC	Real-Time Clock
RTC	Room Temperature Cure
RTC	Real-Time Computer
RTC	Real-Time Command
RTC	Real-time command
RTCC	Real-Time Command Controller
RTCC	Real-Time Computer Command (UPlink)
RTCC	Real-Time Computer Complex
RTCC	Real-Time Computer Center (NASA)
RTCE	Rotation/Translation Control Electronics
RTCL	Reticle
RTCP	Real-Time Communications Processor
RTCS	Real-Time Computer System
RTD	Real-Time Display
RTD	Rate Damping
RTD	Resistance Temperature Device
RTE	Responsible Test Engineer
RTG	Radi0isotope Thermal Generation
RTG	Radioisotope Thermoelectric Generator
RTG	Range (Slant) to Ground
RTG	Radioisotope thermoelectric generator
RTHC	Rotation-Translation Hand Controller
RTHS	Real-Time Hybrid System
RTIF	Real-Time Interface
RTLS	Return to Launch Site
RTLS	Return to launch site
RTN	Return
RTO	Responsible Test Organization
RTOP	Research and Technology Objectives and Plans
RTR	Rotor
RTS	Remote Tracking Station
RTS	Real-Time Supply
RTSF	Real-Time Simulation Facility
RTTV	Real-Time Television
RTU	Renote Terminal Unit
RTV	Room-Temperature Vulcanized
RTV	Room-temperature vulcanizing
RU	Remote Unit
RUD	Rudder
RUPT	Rupture
RUPT	Interrupt
RUT	Resource Utilization Time
RV	Relief Valve
RV	Reentry Vehicle
RV	Retrieval Vessel
RV	Recovery Vehicle
RV	Recirculation Valve
RV	Recovery Vessel
RVCF	Remote Vehicle Checkout Facility
RVDT	Rotary Variable Differential Transducer
RVDT	Rotary Variable Differential Transformer
RVN	Requirements Verification Network
RVR	Runway Visible (or Visual) Range
RVS	Reverse
RW	Response Word
RWD	Right Wing Down
RWM	Read/Write Memory
RYD	Real Year Dollars
RZ	Return-to-Zero
Ra	Radium
Ri	Rockwell International
[S]
S CHG	Supercharge
S PRES	Star  Present
S TRK	Star  Tracker
S&A	Science and Application
S&A	Safe and Arm (Device)
S&AD	Science and Applications Directorate
S&E	Science and Engineering (MSFC Directorate)
S-BD	S-Band
S-N	Stress Number
S/0	Shutoff
S/0	Switchover
S/8	Standby
S/A	Spacecraft Adapter
S/A	Safe and  Arm
S/A	Scheduled/Actual
S/A	Site Activation
S/A	Subassembly
S/AC	Stabilization/Attitude Control
S/C	Stabilization and Control
S/C	Stripchart (Recorder)
S/C	Subcontractor
S/C	Splitter/Combiner
S/C	Software Contractor
S/C	Signal Conditioner
S/C	Sensor/Controller
S/C	Spacecraft
S/EOS	Standard Earth Observation Satellite
S/F	Safety Factor
S/F	Single Flow
S/G	Strain Gage
S/L	Shop/Laboratory
S/M	Scheduled Maintenance
S/M	Service/Maintenance
S/M	Structural/Mechanical
S/M	Systems management
S/N	Serial Number
S/N	Signal-to-Noise Ratio
S/P	Serial to Parallel
S/P	Signal Processor
S/R	Send and Receive
S/R	Shift Register
S/R	Stimulus/Response
S/S	Samples per Second
S/S	Single Sideband
S/S	Space Shuttle
S/S	Subsystem
S/Sys	Subsystem
S/U	Set Up
S/V	Space Vehicle
S/V	SuPply Valve
S/W	Software
SA	Safing Area
SA	Shaft Angle
SA	Single Access
SA	Site Activation
SA	Subaccount
SA	Supplemental Agreement
SA	Support Area
SAA	Safety Assurance Analysis
SAA	South Atlantic Anomaly
SAAC	Schedule Allocation and Control
SAALC	San Antonio Air Logistics Center
SAAM	Special Air Force Airlift Mission
SAAMA	San Antonio Air Material Area
SAAS	Shuttle Aerosurface Actuator Simulation
SAB	Shuttle Avionics Breadboard
SAB	Spacecraft Assembly Building
SAB	Storage and Assembly Building
SAB	SAC           strategic  Air  Command   (USAF)
SACS	SuPport Action Center
SACS	Software Avionics Command SuPport
SACS	Systems Software Avionics Command SuPport
SACS	SAD           shuttle  Authorized   Document
SACS	Spacecraft Attitude Display
SACS	SYstems  Allocation   Document
SADEC	Spin Axis Declination
SADEC	SAE           society of Automotive  Engineers
SADEC	SAEF           spacecraft Assembly and EncaPsulation Facility
SADEC	SAES
SADEC	stand-Alone  Engine  Simulator
SADEC	SAFE           San Andreas  Fault  Experiment
SAEF	Spacecraft Assembly and Encapsulation Facility (KSC)
SAG   E	Stratospheric Aerosol Gas Experiment
SAG   E	SAIL           Shuttle Avionics Integration Laboratory
SAIL	Shuttle Avionics Integration Laboratory (JSC)
SAL	Scientific Airlock
SAL	Shuttle Avionics Laboratory
SAL	SALC           Sacramento Air Logistics Center
SAM	Shuttle Attachment ManiPulator
SAM	SYstem Activation and Monitoring
SAM	SAMP           Shuttle Automated Mass Properties
SAM	SAMS           Shuttle Attachment ManiPulator SYstem
SAMSO	Space and Missile SYstems Organization (USAF)
SAMSOR	SAMSO Regulation (now SDR)
SAMTEC	SPace and Missile Test Center (VAF CA)
SAMTEC	Space and Missile Test Center Manual
SAMTO	Space and Missi e Test Organization (VAFE3)
SAND	I
SAP	Site Activation Need Date
SAR	Strain Arrestor Plate
SAR	SafetY AnalYsis Report
SAR	Search and Rescue
SARP	Summary AnalYsis Report
SARP	SafetY AnalYsis RePort for Packaging
SART	Shuttle Astronaut Recruitment Program
SAS	Stimuli Analog Refresh Table
SAS	Solar Array SYstem
SAS	StabilitY Augmentation SubsYstem
SAS	StabilitY Augmented SYstem
SASTP	Stand-Alone Self-Test Program
SAT	"Saturate, Saturated"
SAT	Systems  Approach  to  Training
SATAF	Shuttle Activation  Task  Force
SATO	Shuttle  Attached  Teleoperator
SATO	Supply and Transportation Operations
SATS	Shuttle Avionics Test System
SATS	Small Applications Technology Satellite
SAU	Signal Acquisition  Unit
SAU	StraP Around Unit
SAVER	Shuttle Avionics Verification and Evaluation
SAWD	Solid Amine Water Desorbed
SB	Space Base
SB	Speed Brake
SB	Synchronization Base
SB	Synchronization Bit
SBA	Seat Back Assembly
SBA	Small  Business  Administration
SBA	Structure Borne Acoustic
SBAS	S-Band  Antenna   Switch
SBC	Speed   Brake    Command
SBCR	Stock Balance and Consumption Report
SBD	Schematic Block Diagram
SBE	Sub-Bit Encoder
SBHC	Speed Brake Hand Controller
SBP	San Luis Obispo (TACAN Station)
SBP	Sonic Boom Panel
SBS	Satellite Business System
SBTC	Speed  Brake/Thrust  Controller
SBTC	Speed brake/thrust controller
SBX	S-Band Transponder
SC	Scale
SC	Service Charge
SC	Signal Conditioner (S/C preferred)
SC	Statement of  Capability
SC	Statement of Compatibility
SC	Support Contractor
SC	Surface Command
SCA	Schedule  Change  Authorization
SCA	Sequence Control Assembly
SCA	Shuttle Carrier Aircraft
SCA	simulation Control Area
SCA	Sneak Circuit  Analysis
SCA	Shuttle carrier aircraft
SCA	Sequence control assembly
SCAMA	Station conferencing and monitoring arrangement
SCAN	Antenna Scan
SCAN	Selected Current  Aerospace  Notices
SCAPE	Self-Contained Atmospheric Protective Ensembly
SCAPE	Self-contained atmosphere protective ensemble
SCARS	Sneak Circuit Analysis Report Summary
SCAS	Subsystem COMPuter Application Software
SCAT	Space  Communication   and   Tracking
SCATS	"Storage, Checkout, and Transport"
SCB	Specification Control Board
SCB	Simulation Control and Training SYstem
SCB	Schedule Change  Board
SCB	Selection Control Board
SCB	Selector Control Box
SCB	Software Control  Board
SCBD	Seller's Approved Configuration  ase ine
SCC	Standard Cubic Centimeters
SCC	Safety Control Center
SCC	Simulation Control Center
SCCB	Site Configuration Control Board
SCCH	Standard Cubic Centimeters-per Hour
SCD	Source Control Document
SCD	Specification Control Document
SCD	Specification Control Drawing
SCD	Source Control Drawing
SCDA	"Safing, Cooldown, and Decontamination Area"
SCDP	Simulation Control Data Package
SCDR	Software Critical Design Review
SCDR	Shuttle Critical Design Review
SCDR	Seller Critical Design Review
SCDR	Subcontractor Critical Design Review
SCDU	Signal Conditioning and Display Unit
SCE	Signal Conditioning Equipment
SCEA	Signal Conditioning Electronics Assembly
SCF	Sequenced Compatibility Firing
SCF	Satellite Control Facility
SCF	Safing and DeServicing Facility
SCF	Sunnyvale  Control  Facility
SCF	Spacecraft Control  Facility
SCF	Standard Charge Factor
SCF	Standard Cubic Feet
SCF	Statistical Collection File
SCF	Satellite Control Facility
SCFH	Standard Cubic Feet per Hour
SCFM	Standard Cubic Feet per Minute
SCFS	Standard Cubic Feed per Second
SCGSS	Super Critical Gas Storage System
SCHED	"Scheduled, Scheduling"
SCHEM	Schematics
SCIT	Standard Change Integration and Tracking
SCL	Specification Change Log
SCL	Secondary Coolant Loop
SCL	Secondary Coolant Line
SCLM	"Stability, Control, and Load Maneuvers"
SCM	Subsystem Configuration Monitoring
SCM	Subsystem Configuration Management
SCM	Site Configuration Message
SCM	System Control Module
SCM	System control module
SCMB	Development Configuration Management Board
SCMP	System Contractor Management Plan
SCN	Specification Change  Notice
SCNP	Preliminary Specification Change Notice
SCNR	Scanner
SCOE	Special  Checkout  Equipment
SCP	Scanner Control Power
SCP	Specific Candle Power
SCR	Schedule Change Request
SCR	Stripchart Recorders
SCR	Software Change Request
SCR	Sneak Circuit Report
SCRG	SYstem Change Review Group (MSFC)
SCRL	Station Configuration Requirement List
SCRS	Stripchart Recording System
SCRS	Serialized Control and Reporting System
SCRSY	Serialized Control and Record SYstem
SCSG	Strain gauge signal conditioner
SCT	Scanning Telescope
SCU	Signal conditioner unit
SCiM	Standard Cubic Inches per Minute
SCiU	Spacecraft Interface Unit
SCiU	Selector Control Interface Unit
SD	Scaling and DisPlay
SD	Smoke Detector
SD	Space Division (AFSC)
SD	Space Division (Rockwell)
SD	Spare DisPosition
SD	Specification Document
SD  L	Standard Distribution List
SD  L	Software Development Laboratory
SD/FS	Smoke Detector/Fire SuPpression
SD/FS	SuPPlier Documentation
SD/YVV	SD/Launch Base Div['si'on
SDA	Shaft Drive Axis
SDAF	Solid Rocket Booster Disassembly Facility
SDAF	Source Data Automatic)n
SDB	Shallow Draft Barge
SDC	Shallow Draft Board
SDC	Software DeveloPment COmPuter
SDC	Spares DisPosition Code
SDCL	SuPPlier Documentation Checklist
SDCP	Summary DeveloPment Cost Plan
SDCS	SAIL Data Communications SYstem
SDD	System Design Document
SDD	Software Design Document
SDD	Software DescriPtion Document
SDD	Shuttle Design Directive
SDE	Space Division Evaluator
SDF	System Development Facility (Breadboard)
SDF	Software Development Facility
SDF	Single Degree of Freedom
SDF	Safing and Deservicing Facility
SDG	Supplier Documentation Group
SDH	System Development Handbook
SDH	Software Development Handbook
SDI	Selective Dissemination of Information
SDIF	Software Development and Integration Facility
SDM	Subsystem Design Manuals
SDM	SYstem Definition Manual
SDM	Shuttle Data Management
SDN	Software Development Note
SDP	Supplier Data Package
SDP	Software Development Plan
SDP	Site Data Processor
SDP	Shuttle Data Processor
SDPC	Shuttle Data Processing Complex
SDPC	Shuttle Data Processing Complex
SDR	System Design Review
SDR	Spacelab DisPosition Record (ESA)
SDR	Space Division Regulation
SDR	Software Design Review
SDR	Software Design Requirements
SDRB	SUPPlier Documentation Review Board
SDRB	Software Design Review Board
SDRD	SuPplier Data Requirements Description
SDRD	SuPplier Documentation Review Data
SDRL	Supplier Data Requirements List
SDS	Software Design Specification
SDS	Steering Damping System
SDS	Shuttle Dynamic Simulation (Simulator)
SDSS	Space Division Shuttle Simulator
SDT	Structural Dynamic Test
SDT	Scaling and Display Task
SDT	Shuttle Data Tape
SDTA	structural Dynamic Test Article
SDVF	software DeveloPment and Verification Facilities
SE	support EquiPment
SE&I	System Element
SE&I	SYstems Engineering and Integration
SE/FAC	Support Eq uipm ent/Facility
SEA	Scanning Electrostatic Analysis
SEA	Silicon Elastimeter Ablator
SEACF	support Equipment Assembly and Checkout Facility
SEADS	shuttle Entry Air Data Sensor
SEADS	Shuttle EntrY Air Data System (Subsystem)
SEADS	Shuttle entry air data system
SEAID	SuPport Equipment Abbreviated Items Description
SEAPG	Support Equipment Acquisition Planning Group
SEARCHS	Simulation
SEARCHS	"Shuttle Engineer',ng Approach/Rollout Control Hybrid"
SEB	Scientific Equipment Bay
SEB	Support Equipment Building
SEB	Source Evaluation Board
SEB	SYstems Engineering Branch
SEC	Secondary
SEC	Sequential Events Controller
SEC	Secondary
SECO	Sustainer Engine Cutoff
SECS	Shuttle Events Control
SEE	Standard End Effector
SEE	Special Purpose End Effector
SEE	Subsystem
SEG	Segment
SEI	SuPPort EquiPment Installation
SEI	SYstem Engineering Groundrule
SEICO	SuPPort EquiPment Installation and Checkout
SEICO	System Engineering Instrumentation
SEL	"Select, Selector"
SEM	Seller's Engineering Memo
SEM	Space Environment Monitoring
SEM	System Engineering Management
SEM	Scanning Electron microscope
SEMS	Space Environment Monitor System
SEN	Sensor
SEND	Shared Equipment Need Date
SENS	Sensitivity
SEO	Special Engineering Order
SEOS	Synchronous Earth Observation Satellite
SEP	Separation
SEP	Source Evaluation Panel
SEP	SUPPort Equipment Package
SEPAP	Shuttle Electrical Power Analysis Program
SEPAR	Shuttle Electrical Power Analysis Report
SEPS	Solar Electric Propulsion System
SEQ	"Sequence,Sequencer"
SER	Serial
SERB	Systems Engineering Review Board
SERB	Shuttle Engineering Review Board
SERS	Shuttle Equipment Record System
SERV	Service
SERVO	Servomechanism
SES	SPecial Emphasis Study
SES	Shuttle Engineering Simulation
SESC	Shuttle Events Sequential Control
SESL	Space Environmental Simulation Laboratory
SEUL	Support Equipment Utilization List
SF	Sliding Filter
SF	Signaling Frequency
SF	Selection Filter
SF	Directorate)
SF	"Safe, R and QA (R&QA), and Protective Services (KSC"
SF	Safe
SF	Subcontractor Furnished
SF	Star Field
SF	Static Firing
SF	Scale Factor
SF	Safety Factor
SF-SOO	KSC Safety Operations Office
SFA	Sun Finder Assembly
SFACI	Software Flight Article Configuration Inspection
SFC	Specific Fuel Consumption
SFC	Selection Filter Control
SFCS	Survival Flight Control System
SFD	Crossfeed
SFDS	System Functional Design Specification
SFDT	Site Format Dump Tape
SFEX	Solar Flare X-ray Polarimeter
SFL	Secondary Freon Loop
SFME	Storable Fluid Management ExPeriment
SFO	Space Flight Operations
SFOM	Shuttle Flight Operations Manual
SFOP	Safety Operating Procedure (KSC)
SFP	Summary Flight Plan
SFP	Single Failure Point
SFPA	Single Failure Point Analysis
SFPPL	Short Form Provisioning Parts List
SFPS	Single Failure Point Summary
SFS	Shuttle Flight Status
SFSS	Satellite Field Service Station
SFT	Simulated Flight Test
SFT	Shaft
SFT	Static Firing Test
SFTA	Structural Fatigue Test Article
SFTF	Static Firing Test Facility
SFTWE	Software
SFU	Standard Firing Unit
SFW	Software
SFWE(M)	Static Feed Water Electrolysis (Module)
SG	gnal Generator
SG LS	Space Ground Link Station
SGC	abilized Ground Cloud
SGLS	Space-ground link system
SGLSY	Space Ground Link SYstem
SGMT	Simulated Greenwich Mean Time
SGOS	Shuttle Ground Operations Simulation (Simulator)
SGP	Single Ground Point
SGS	Steep Glide Slope
SGSC	Strain Gage Signal Conditioner
SH LD	Shield
SH2	Supercritical Hydrogen
SHA	System Hazard Analysis
SHA	Sidereal Hour Angle
SHAG	Simplified High Accuracy Guidance (Honeywell)
SHDN	Shutdown
SHE	SuPercritical Helium
SHERB	Sandia Human Error Rate Bank
SHF	Super High Frequency
SHLB	Simulation Hardware Load Boxes
SHLDR	Shoulder
SHORAN	Short Range Navigation
SHP	Shaft HorsePower
SHRD	Shroud
SHRD	Supplemental Heat Rejection Devices
SHS	Simulation Hardware System
SHTR	Shutter
SHUTDN	Shutdown
SIA	Software Impact Assessment
SIA	Solar Inertial Attitude
SIA	Shuttle Induced Atmosphere
SID	Standard Interface Document
SID	System Interface Document
SID	Simulator Interface Devices
SID	Shuttle Integration Device
SIE	Shuttle Interface Equipment       Services
SIES	"Supervision, Inspection, Engineering, and"
SIG	Signal
SIG CONDR	Signal Conditioner
SIG GEN	Signal Generator
SIL	Systems Integration Laboratory
SIL	Sound Interference Level
SIL	Silver
SILTS	Shuttle Infrared Leeside Temperature Sensing
SILTS	Shuttle infrared leeside temperature sensing
SIMAS	System
SIMAS	Shuttle Information Management Accountability
SIMFAC	Simulation Facility
SIMR	Systems Integration Management Review
SIN	Sine
SIP	SYstems Integration Office
SIP	Strain Isolator Pad
SIP	Scientific Instrument Package
SIP	Separation Instrument Package
SIP	Strain isolation pad
SIPS	Small Instrument Pointing System
SIR	Shuttle Imaging Radar
SIR	System Interface Requirements
SIR	Systems Integration Review
SIR	Software Initiated Restart
SIR-A	Shuttle Imaging Radar@A
SIRR	Software Integration Readiness Review
SISWG	STS Integrated Schedule Working Group
SIT	Software Integrated Test
SIT	Shuttle Interface Test
SIT	Situation
SIT	SSV Integrated Test
SIT	Shuttle Integrated Test
SIU	Signal interface unit
SIVE	Shuttle Interface Verification EquiPment
SKD	"Singer, Kearfott Division"
SL	Sea Level
SL	SPacelab
SL	Shelf Life
SL	Sound Level
SL	Seal
SL&I	System Load and initialization
SL-SS	Spacelab Subsystems
SL-SSS	Spacelab Subsystem(s) Segment
SLA	Support and Logistics Areas
SLA	ERNO Spacelab Product Assurance Department
SLAC	Stanford Linear Accelerator Center
SLAHTS	Stowage List and Hardware Tracking System
SLAK	Spacelab Late Access Kit
SLAM	Side Load Arrest Mechanism
SLAR	Side Looking Airborne Radar
SLC	Space Launch Complex
SLC	ERNO SPacelab Project Control
SLCA	ERNO Spacelab Contract Administration
SLCC	ERNO Spacelab Configuration Management
SLCL	ShoP/Lab Configuration Layout
SLD	Stiff-Leg Derrick
SLE	ERNO Spacelab Engineering
SLEMU	SPacelab Engineering Model Unit
SLF	Shuttle Landing Facility (OLF)
SLF	Shuttle landing facility (KSC)
SLI	ERNO Spacelab Integration and Test
SLL	Shelf Life Limit
SLM	Sound Level Meter
SLN	ERNO SPacelab Payload
SLO	ERNO Spacelab Operations
SLOS	Star Line of Sight
SLP	ERNO Spacelab Program Office
SLPB	Spacelab Program Board
SLRV	Shuttle Launched Research Vehicle
SLS	Secondary Landing Site
SLS	Sortie Lab Simulator
SLS	Spacelab Simulator
SLS	Statement Level Simulator
SLS	Spacelab simulator
SLSA	Shuttle Logistics Support Aircraft
SLSMS	Spacelab Support Module Simulator
SLT	ERNO Spacelab Technology
SLV	Space Launch Vehicle
SM ES	"Shuttle Mission Eng',neering Simulator"
SM ES	Shuttle Mission Evaluation Simulation (Simulator)
SM IA	Serial Multiplexer Interface Adapter
SM&S	Systems Management and Sequencing
SM/PM	System Management/Performance Monitor
SMAB	Solid Motor Assembly Building
SMAB	Solid Motor Assembly Building
SMAG	Star Magnitude
SMART	Shuttle Meeting Action - Item Review Tracking
SMB	Space Meteorology Branch
SMCH	Standard Mixed Cargo Harness
SMD	Special Measuring Device
SMD	Special Measuring Service
SMD	Spacelab Mission DeveloPment
SMDC	Shielded Mild Detonating Cord
SMEAR	Span/Mission Evaluation Action Request
SMG	Superconduction Magnetic Energy Storage
SMG	SPaceflight Meteorology Group
SMIR	Shuttle Multispectral Infrared Radiometer
SML	Structure Mold Line
SMMD	Specimen Mass Measurement Device
SMP	software Management Plan
SMPM	Structural Materials Property Manual
SMPTRB	Shuttle Main Propulsion Test Requirement Board
SMQ	structure Module Qualification Test
SMR	"source, Maintenance, and RecoverabilitY (Code)"
SMRD	Spin Motor Rotational Detector
SMRD	Spin Motor Run Discrete
SMRM	solar Maximum Repair Mission
SMS	Shuttle mission simulator
SMSi	Standard Manned Space Flight Initiator
SMT	Selective Message Transaction
SMTAS	Shuttle Model Test and Analysis System
SMU	Speaker/microphone unit
SMVP	Shuttle Master Verification Plan
SMVRD	Shuttle Master Verification Requirements Document
SNF	SYstem Noise Figure
SNR	Signal-to-Noise Ratio
SNSO	Space Nuclear SYstems Office
SNSR	Sensor
SOA R	Shuttle Orbital Applications and Requirements
SOARS	Shuttle Operation Automated Reporting System
SOATS	SLPport Operation Automated Training System
SOCA R	Shuttle Operational Capability Assessment Report
SOCH	Spacelab Orbiter Common Hardware
SODB	Shuttle Operational Data Book
SODB	Start of Data Block
SODS	Shuttle Operational Data System
SODS	Skylab Orbit-Deorbit System
SOF	Safety of Flight
SOFI	Spray-on Foam Insulation
SOFT	Space Operations and Flight Techniques
SOH	Start of Heading
SOL	Solar
SOL	Solenoid
SOL	Squelch
SOLN	Solution
SOMF	Start of Minor Frame
SOMS	Shuttle orbiter medical system
SOMS	Shuttle orbiter medical system
SOP	Secondary Oxygen Pack
SOP	Spacelab OPportunity Payload
SOP	Subsystem(s) Operating Procedure
SOP	Systems Operation Plan
SOP	Standard Operating Procedure
SOP	Subsystem operating program
SOPC	Shuttle Operations Planning Complex
SOPC	Shuttle Operations and Planning Center
SOR	"Stable Orbit Rendez,o,s"
SOR	Specification Operational Requirement
SORPTR	South Repeater
SORTIE	Short Term Mission
SOT	Strap-on Tank
SOTS	Suborbital Tank Separation
SP	Shoulder Pitch
SP	Shuttle Projects Office (KSC)
SP	Signal Processor
SP	Single Pole
SP	Single Precision
SP	Solar Physics
SP	Spare
SP	Spin
SP	Standard or Peculiar
SP	Static Pressure
SP&S	Special Processes and Sequencing
SP-AF	Air Force STS Liaison Office (KSC Shuttle)
SP-AF	Air Force Support Office (KSC)
SP-FGS	Flight and Ground Systems Office (KSC Shuttle)
SP-ILS	Integrated Logistics Support Office (KSC Shuttle)
SP-LMO	Logistics Management Office (KSC)
SP-OPI	OPerations Planning and Integration Office (KSC
SP-OPI	Shuttle)
SP-OSO	Off-Site Offices (KSC Shuttle)
SP-PAI	Project Assessment and Integration Staff (KSC)
SP-PCO	Program Control Office (KSC Shuttle)
SP-PMS	Performance Management Systems Office (KSC)
SP-SMO	Site Management Office (KSC Shuttle)
SPA	Space Processing Application
SPA	Signal Processor Assembly
SPA	Shared Peripheral Area
SPA	Servo Power Amplifier
SPA	S-Band Power Amplifier
SPA	Signal processor assembly
SPA	Steering position amplifier
SPACE	Spacecraft Prelaunch Automatic Checkout Equipment
SPAD	Subsystem Positioning Aid Device
SPAD	Shuttle Payload Accommodation Document
SPADS	Shuttle Problem Analysis Data System
SPADS	Shuttle Problem Action Data System
SPAF	Simulation Processor and Formatter
SPAH	Spacelab Payload Accommodations Handbook
SPAN	Spacecraft Analysis
SPART	Space  Research   and   Technology
SPAS	Shuttle Pallet Satellite  (German)
SPC	Starting Point Code
SPC	Shipping and Packing Cost
SPC	Stored Program Command
SPC	Synoptic Properties Code
SPC	Shuttle processing contractor
SPCC	STS Processing Control Center
SPCU	Simulation  Process  Control  Unit
SPCW	Stored   Program   Command    Word
SPD	Standard Practice Directive
SPD	Speed
SPD  R	Software Preliminary Design Review
SPDB	Subsystem Power Distribution BC)x
SPDBK	Speed   Brake
SPDCI	Standard Payload Display and Control Interface
SPE	Solid Polymer Electrolysis
SPE	Static Phase Error
SPEC	Specialist Function
SPEC	Specification
SPECT	Spectrometer
SPEE	Special Purpose End Effector
SPF	Single Point Failure
SPF	Software Production Facility
SPF	Spacelab Processing Facility
SPFA	Single Point Failure Analysis
SPFP	Single Point Failure Potential
SPG	Signal Point Ground
SPG	Single Point Ground
SPHER	Spherical
SPI	Surface Position Indicator
SPI	Surface position indicator
SPIAP	Shuttle/Payload Integration Activities Plan
SPICE	SPacelab Payload Integration and Coordination in
SPICE	Europe
SPIDF	Support Planning Identification File
SPIDPO	Office (JSC)
SPIDPO	Shuttle Payload Integration and Development Progra
SPIDPO	Shuttle Payload Integration and Development Program Office
SPIF	Standard Payload Interface Facility
SPIF	Shuttle Payload Integration Facility
SPII	Shuttle Program Implementation Instruction
SPIMS	Shuttle Program Information Management System
SPKB	Speed   Brake
SPKR	Speaker
SPL	Scratch Pad Line
SPL	Serialized Parts List
SPL	Sound Pressure Level
SPL	System Programming Language
SPLX	Simplex
SPLY	Supply
SPM	Subsystem   Project   Manager
SPMS	Special Purpose Manipulator System
SPN	Shuttle Project Notice (KSC)
SPND	Suspend
SPO	Spare Parts Order
SPO	Shuttle Projects Office
SPO	SYstem Program Office
SPOC	Shuttle Payload Operations Contractor
SPOM	STS Planning and Operations Management
SPP	Simulation Planning Panel
SPP	Solar Physics Payload
SPPIL	Shuttle Preferred Pyrotechnic Items List
SPPL	Spare Parts Provisioning List
SPPP	Spacelab Payloads Processing Project
SPR	Software Problem Report
SPR	Subcontractor Performance Review
SPRAG	STS Payloads Requirements and AnalYsis Group
SPRT	Sequential Probability Ratio Test
SPS	Service Propulsion  Subsystem
SPS	Shuttle Procedures  Simulator
SPS	Statement of Prior Submission
SPS	Samples per Second
SPS	Secondary  Propulsion  System
SPS	Solar Power Satellite
SPT	Support
SPT	Steering position transducer
SPTD	Supplemental Provisioning Technical Documentation
SPVPF	Shuttle Payload Vertical Processing Facility
SQ  FT	Square Feet
SR	Statement of Requirements
SR	Sunrise
SR	Status Register
SR	Status Report
SR	Status Review
SR	Support Request
SR	Standard Repair
SR	Shift Register
SR	Scan Ratio
SR	Support Room
SR&Q	"Safety, Reliability, and Quality"
SR&QA	"Safety, Reliability, and Quality Assurance"
SRA	Spin Reference Axis
SRA	Support Requirements Analysis
SRAG	Space Radiation Analysis Group
SRB	Solid Rocket Booster
SRB	Solid rocket booster
SRBAB	SRB Assembly Building
SRBDF	SRB Disassembly Facility
SRBPF	Solid Rocket Booster Processing Facility
SRC	Sample Return Container
SRCB	Software Requirements Change Board
SRCB	Software Requirements Control Board
SRCBD	Software Requirements Change Board Directive
SRCBD	Software Requirements Control Board Directive
SRCH	Search
SRD	Shuttle Requirements Definition
SRD	Shuttle Requirements Document
SRD	SYstems Requirements Document
SRDH	Subsystems Requirement Definition Handbook
SRDH	System Requirements Definition Handbook
SRE	STDN Ranging Equipment
SRF	Shuttle Refurbishment Facility
SRH	Subsystems Requirements Handbook
SRM	Standard Reference Material
SRM	SPecification Requirements Manual
SRM	Solid Rocket Motor
SRM	Solid rocket motor
SRMC	Stimulus/Response Measurements Catalog
SRN	Software Release Notice
SRO	Supervisor Range Operations
SRPA	Spherical Retarding Potential Analyzer
SRR	Site Readiness Review
SRR	Shuttle Requirements Review
SRR	Software Requirements Review
SRR	System Requirements Review
SRS	Software Requirements Specification
SRS	Simulated Remote Station
SRS	Support Requirements System
SRS	Specification Revision Sheet
SRSF	SRB Refurbishment and Subassembly Facility
SRSF	SRB Receiving and Subassembly Facility
SRSR	Schedule and Resources Status Report
SRSS	Shuttle Range Safety System
SRT	Supporting Research and Technology
SRT	Station Readiness Test
SRT	Specification Requirements Table
SRT	Special Rated Thrust
SRT	Shuttle Requirements Traceability
SRU	Space Replaceable Units
SRU	ShOP-Replaceable Unit
SRU	Shop Replacement Unit
SRVL	Survival
SS	System Software
SS	Single String
SS	Subsystem
SS	Station Set
SS	Space Station
SS	System Summary
SS	Space Shuttle
SS	System Specification
SS	Sunset
SS	Shuttle System
SS	Single Sideband
SS&A	Space Systems and Applications
SSA	S-Band Single Access
SSA	Shuttle Simulation Aircraft
SSA	Space Suit Assembly
SSA 1/0	GCOS Program Element Name
SSAT	SPace Shuttle Access Tower (now FSS)
SSAT	Shuttle Service and Access Tower
SSB	Single Sideband
SSB	Source Selection Board
SSBC	Summary Sheet Bar Chart
SSC  L	Shuttle System Commonality List
SSCA	Surface Sampler Control Assembly
SSCHS	Space Shuttle Cargo Handling System
SSCP	Small Self-Contained Payloads
SSCSP	Space Shuttle Crew Safety Panel
SSD	Spacecraft Software Division
SSD	System Summary Display
SSDD	Software System Design Document
SSDH	Subsystem Data Handbook
SSDS	Space Station Data System
SSE	Space Shuttle Engines
SSE	Subsystem Element
SSE	SubsYstem Support Equipment
SSEOS	Space Shuttle Engineering and Operations Support
SSF	SRB Storage Facility
SSFGSS	Space Shuttle Flight and Ground System Specification
SSFL	Santa Susana Field Laboratory
SSFS	Space Shuttle Functional Simulator
SSHB	Station Set Handbook
SSIBD	Shuttle System Interface Block Diagram
SSID	Shuttle Stowage Installation Drawing
SSIP	Systems Software Interface Processing
SSITP	Shuttle System Integrated Test Plan
SSL	System Software Loader
SSM B	Space Shuttle Maintenance Baseline
SSM E	Space Shuttle Main Engine
SSM EC	Space Shuttle Main Engine Controller
SSME	Space shuttle main engine
SSMECA	Space Shuttle Main Engine Controller Assembly
SSMECA	SSM E Controller Assembly
SSOP	Space Systems Operating Procedure(s)
SSP	Standard Switch Panel
SSP	Space Shuttle Program
SSP	Small Sortie Payload
SSPC	Spacelab  Stored  Program  Command
SSPD	Shuttle System Payload Data
SSPD	Shuttle System Payload Description
SSPD	Shuttle System Payload Definition (Study)
SSPDA	Space Shuttle Payload Data Activity
SSPDB	Subsystem Power Distribution Box
SSPDS	Space Shuttle Payload Data Study
SSPGSE	Space Shuttle Program Ground Support Equipment
SSPM	Space Shuttle Program Manager
SSPO	Space Shuttle Program Office
SSPP	SYstem Safety Program Plan
SSPPSG	Space Shuttle Payload Planning Steering Group
SSPRO	Space Shuttle Program Resident Office
SSPS	Space Shuttle Program schedule
SSPTF	Santa Susana Propulsion Test Facility (see SSFL)
SSR	Shop Support Request
SSR	Station Set Requirement
SSR	System Requirements Review
SSR	Staff SuPport Room
SSRD	Station Set Requirements Documents
SSRN	System Software Reference Number
SSRR	Station Set Requirements Review
SST	Single  System  Trainer
SST	Subsystem Terminal on Spacelab
SST	Structural Static  Test
SST	SPacecraft Systems Test
SSTC	Space Shuttle Test Conductor
SSUS-A	SSUS for Atlas-Centaur Class Spacecraft
SSUS-D	SSUS for Delta Class Spacecraft
SSUSP	Spinning Solid Upper Stage Project
SSiS	Space Station Information System
ST	Star Tracker
ST	Spacelab Technology
ST	SPace Telescope
ST	Static
ST	Sequential Timer
ST	Special Tooling
ST	Self Test
ST	Starter
ST	SimPlification Task
ST	Structural
ST	Star tracker
STA	Static Test Article
STA	Station
STA	Structural Test Article
STA	Shuttle Training Aircraft
STA	Structural test article
STA R	Scientific and Technical Report
STA R	Shuttle Turnaround AnalYsis Report
STAB	"Stabilize, Stabilizer"
STADAC	Station Data Acquisition and Control
STADAN	Satellite Tracking and Data Acquisition Network
STADAN	Space Tracking and Data Acquisition Network
STADN	Space Tracking and Acquisition Network
STADU	System Termination and Display Unit
STAG	Shuttle Turnaround AnalYsis Group
STARR	"Schedule, Technical, and Resources Report"
STAT	Status
STAT	Statistics
STBD	Starboard
STBY	Standby
STC	Standard Test Configuration
STC	Systems Test Complex
STC	Spacecraft Test Conductor
STC	Satellite Test Center
STCP	Short-Term Cost Plan
STD	Standard
STD	Shuttle Test Director
STD L	Standard Distribution List (letter denoting which list
STD L	follows)
STDN	Spaceflight Tracking and Data Network
STDN	Space Tracking and Data Network
STDN	Space flight tracking and data network
STDY	Steady
STE	Special Test EquiPment
STE	System Test Engineer
STF	Spin Test Facility (see DSTF)
STF	Structural Fatigue Test
STG	Stage
STIL	Software Test and Integration Laboratory
STIRD	SAIL Test Implementation Requirements Document
STL	Space Technology Laboratories
STLOS	Star Line of Sight
STM	Signal Termination Module
STM	Static Test Model
STM	Support Test Manager
STN	Software Trouble Note
STO	Stow
STOCC	Space Telescope Operations Control Center
STP	Space Test Program
STP	Self-Test Program
STP	Shuttle Technology Panel
STP	Subsystem Test Plan
STP	Space Technology Payload
STPH	Static Phase Error
STR	Structure
STR	System Test Review
STR L	Structural
STRB	Strobe
STRCH	Stretch
STRFLD	Star Field
STRG	Steering
STRG	String
STRUC	Structure
STRUCT	Structure
STS	Structural Transition Section
STS	Space Transportation System
STS	Shuttle Test Station
STS	Space transportation system
STS R	System Test Summary Report
STSG	Shuttle Test Group
STSOPO	Off ice (JSC)
STSOPO	Shuttle Transportation Systems Operations Program
STT	Spacelab Transfer Tunnel
STU	Special Test Unit
STU	Star Tracker Unit
SUB	Substitute
SUBJ	Subject
SUMS	Shuttle upper atmosphere mass spectrometer
SUP	Supply
SUP	Support
SUPCRIT	Supercritical
SUPPR	Suppression
SUPSALV	Supervisor of Salvage (U.S. Navy)
SUPT	Support
SUPV	Supervisor
SURE	Shuttle Users Review and Evaluation
SURF	Surface
SURS	Standard Umbilical Retraction System
SUTAGS	Shuttle Uplink Text and Graphics Scanner
SVA&C	Shuttle Vehicle Assembly and Checkout
SVAB	Shuttle Vehicle Assembly Building
SVAC	Shuttle Vehicle Assembly and Checkout (Facility)
SVAFB	South Vandenberg Air Force Base
SVB	Shuttle Vehicle Booster
SVB	Space Vehicle Booster
SVDS	Space Vehicle Dynamic Simulator
SVRR	Software Verifir-ation Readiness Review
SW/PM	System Management/Performance Monitor
SWA	Support Work Authorization
SWAA	"SPacelab Window Adapte, Assembly"
SWAD	Subdivision of Work Authorization Document
SWAT	Stress Wave Analysis Technique
SWG	Software Working Group
SWOB	"Salaries, Wages, Overhead, and Benefits"
SWP	Safe Working Pressure
SWR	Standing Wave Ratio
SWT	Supersonic Wind Tunnel
SWT	Sextant
SXT	Sextant
SY	System
SY	Shoulder Yaw
SYM	Symbol
SYMM	Symmetrical
SYN	Synthetic
SYN	Synchronous
SYNC	Synchronize
SYNCOM	Hughes Spin Stabilized Spacecraft
SYNCOM	Synchronous Communication Satellite (Hughes)
SYS	System
SYSTRAN	Systems Analysis Translator
SiMCOM	Simulation    Complex
Sims	Shuttle Inventory Management System
Sims	Shuttle Imaging Microwave System
Sols	Spacelab/Orbiter Interface Simulator
Station (KS	Station (KSC)
[T]
T	Temperature Rate
T	Superscript)
T	"Transformation (Matrix), Transpose (Matrix"
T	Throttle Command
T	Time
T	Talk/Monitor
T	Total Temperature
T	Top
T	Thermostabilized
T	Test
T	Temperature
T LSCP	Telescope
T&CD	Timing and Countdown
T&CP	Test and Checkout Procedure
T&D	TransPortation and Docking
T&E	Test and Evaluation
T&M	Time and Materials
T&O	Test and Operations
T+	Time Postintegration
T-	Time Prior to Launch
T-0	Time Zero
T-0	Takeoff
T. B.	Toggle Buffer
T.P.	Transition Period
T/A	Turnaround
T/C	Temperature Compensating
T/C	Thrust Chamber
T/C	Telecommunications
T/C	Termination Check
T/CAP	Thermal Capacitor
T/D	Time Delay
T/D	Touchdown
T/E	Transporter/Erector
T/L	Talk and Listen
T/L	Timeline
T/L	Transformer Load
T/O	Takeover
T/R	Transmitter/Receiver
T/R	Transmit/Receive
T/R	Tape Recorder
T/R	Technical Report
T/R	Transformer Rectifier
T/R	Transportation  Request
T/R	Transmitter/Receiver
T/R	Transportation  Request
T/R	Turnaround RequiremLnts
T/T	Terminal Timing
T/T	Timing/Telemetry
T/TCA	Thrust/Translation Control Assembly
T/V	Thermal Vacuum
T/W	Thrust Weight
T/W	Thrust-to-Weight
T/W	Thrust-to-weight
TA	Task Analysis
TA	Test Article
TA	Time Actual
TA	Travel Authorization
TA	Trunnion Angle
TAA	Temporary Access Authorization
TAA	Technical Assistance Agreement
TAC	"Kennedy Space Center Landing Site, Florida"
TAC	Tactical Air Command
TAC	Total Average Cost
TAC/RA	TACAN  Radar  Altimeter
TACAN	Tactical Air Navigation
TACAN	Tactical Air Command and Navigation System
TACAN	Tactical air navigation
TACH	Tachometer
TACO	Test and Checkout Operations
TAD	Temperature and Dewpoint
TAEM	Terminal Area Energy Management
TAEM	Terminal area energy management
TAG	Technical Air-to-Ground
TAGS	Text and Graphics System
TAIR	Test Assembly Inspection Record
TAL	Transatlantic Abort Landing
TAL	Transoceanic Abort Landing
TALAR	Tactical Approach and Landing Radar
TAM	Thermal Analytical Model
TAN	"Tananarive, Madagascar (STDN Site)"
TAO	Trans-Atlantic Abort
TAP	Total Air Pressure
TAP	Technical Achievement Plan
TAP	Telemetry Acceptance Pattern
TAP	Test Administration  Plan
TAR	Technical Analysis Request
TAR	Test Agency Report
TAR	Test Action Requirement
TARC	TAS            Telemetry Antenna Subsystem
TARC	Test Article Specification
TARC	True Airspeed
TARC	Through Axis Rotational Control
TASPR	TATI            Total Air TemPerature Indicator
TASPR	Technical and Schedule Performance Report
TASPR	TAT            Technical Acceptance Team
TASPR	Total Air Temperature
TASPR	Turnaround Time
TB	Talk Back
TB	Toggle Buffer
TB	Time Duration of Burn
TB	Time Base
TB	Terminal Board
TB	Terminal Base
TBA	To Be Announced
TBA	To Be Added
TBC	Terminal Buffer Controller
TBD	To Be Defined
TBD	To Be Developed
TBD	To Be Determined
TBE	To Be Evaluated
TBF	Test de Bon Fonctionnement (Spacelab)
TBI	Through-Bulkhead Initiator
TBN	To Be Negotiated
TBP	To Be Provided
TBS	Task Breakdown Structure
TBS	To Be Specified
TBS	To Be Superseded
TC	Telecommunications
TC	Temperature Compensating
TC	Test Conductor (Contractor)
TC	Test Conductor (Controller)
TC	Thermal Control
TC	Thermocouple
TC	Thiokol Corporation
TC	Thrust Chamber
TC	Time to Circular
TC	Traceability Code
TC	Tracking Camera
TCA	Thrust Chamber Assembly
TCA	Time of Closest Approach
TCA	Translation Controller Assembly
TCAB	Temperature of Cabin
TCC	Thermal Control Coating
TCC	Test Control Center
TCD	Test Completion Date
TCD	Test Control  Document
TCE	Thermal Canister Experiment
TCF	Tank Checkout Facility
TCG	Test Control Group
TCG	Time Code Generator
TCI	Technical Critical Item
TCID	Test Configuration Identifier Document
TCMD	Transportation Control and Movement Document
TCN	Test Change Notice
TCN	Transportation Control Number
TCO	Test and Checkout
TCO	Taken Care of
TCOP	Test Checkout Pian(s)
TCP	Thrust Chamber Pressure
TCP	Task Control Packet
TCP	Test Checkout Procedure
TCP	Test Control Package
TCR	Thermal Concept Review
TCR	Test Constraints Review
TCR	Test Conductor
TCR	Test Compare Results
TCRSD	Test and Checkout Requirements Spec.  Documentation
TCS	Thermal Control System (Subsystem)
TCS	Test Control System
TCS	Test Control Supervisor
TCS	Technical Concurrence Sheets
TCS	Technical Change Summary
TCSSS	Thermal Control Subsystem Segment
TCTI	Time Compliance Technical Instruction
TCTO	Time Compliance Technical Order
TCU	TaPe Control Unit
TCV	Thrust Chamber Valve
TCV	Temperature Control Voltage
TD	Technical Directive
TD	Test Director (NASA)
TD	Terminal Distributor
TD	Time Delay
TD	Touch Down
TD&SA	"Telephone, Data, and Special Audio"
TDD	Task Description Document
TDM	Time-Division Multiplexing (Multiplexer)
TDP	Tracking Data Processor
TDP	Temperature and Dewpoint
TDR	Technical Documentation Report
TDR	Technical Design Review
TDR	Test Discrepancy Report
TDRR	Test Data Recording and Retrieval
TDRS	Telemetry Downlist Receiving Site
TDRS	Tracking and Data Relay Satellite
TDRS	Tracking and Data Relay Satellite
TDRSS	Tracking and Data Relay Satellite System
TDRSS	Tracking and Data Relay Satellite system
TDS	Technology Demonstration Satellite
TDS	Test Data System
TDU	Time Display Unit
TDV	Test Data Van
TDY	Temporary Duty
TE	Test Equipment
TE	Time Earliest/Expected
TE	Timing Electronics
TE	Trailing Edge
TEC	Test Equipment Center
TECH	Technician
TECH	Technical
TED	Trailing Edge Down
TELCOM	Telecommunications
TELESAT	"TELESAT (Canadian Payload, Communication Satellite)"
TEMP	Test and Evaluation Master Plan
TEMP	Temperature
TEMS	Transport Environment Monitoring System
TEOS	Tetraethyl Orthosilicate
TEP	Test Evaluation Plan
TEP	Technical Evaluation Panel
TER	Time Estimating Relationship
TER	Test Equipment Readiness
TERL	Test Engineer Readiness List
TERL	Test Equipment Readiness List
TERM	Terminate
TESH	Technical Shop
TET	Test Evaluation Team
TF	Test Facility
TF	Test Fixture
TFC	Time from Cutoff
TFCS	Triplex Flight Control System (Subsystem)
TFE	Time from Event
TFF	Time to Free Fall
TFI	Time from Ignition
TFL	Telemetry Format Load
TFL	Time from Launch
TFOV	Total Field of View
TFR	Trouble and Failure Report
TFS	Telemetry Format Selection
TFU	Test Facility Utilization
TG	Ground Systems (KSC Directorate)
TG	"Ground Systems, TS"
TGA	Trace Gas Analyzer
TGA	Thermal Gravimetric Analysis
TGO	Time to Go
TGOWG	Teleoperator Ground Operations Working Group
TGS	Rate Gyro Assembly
TGS	Telemetry Ground Station
TGS	Telemetry Ground System
TGSE	Telemetry Ground Support Equipment
TGT	Target
THC	Translation  Hand  Controller
THC	Translational hand controller
THDS	Time  Homogeneous  Data   Set
THEO	Theoretical
THERM	Thermal
THOLD	Threshold
THOUS	Thousarid
THP	Thrust Horsepower
THROT	Throttle
TI	Information Systems (KSC Directorate)
TI	Technical Integration
TI	Training Integrator (Integration)
TIC	Technical Information  Center
TIC	Total Item Change
TICM	Test Interface and Control Module
TIFS	Total In-Flight Simulator
TIG	Time of Ignition
TIM	Technical Interchange Meeting
TIM	Time Interval Monitor
TIO	Target insertion orbit
TIP	Thrust Inlet Pressure
TIROS	ToPographical Infrared Operations Satellite
TIS	Test Interface subsystem
TK	Tank
TL	Transient Load
TL	Lot Traceability
TL	Thrust Level
TL	Time Latest
TLC	Telecommand
TLCE	Transmission Line Conditioning Equipment
TLM	Telemetry
TLM	Telemetry
TLS	Time Line Sheet
TLS	Top  Left  Side
TLSA	Torso Limb Suit Assembly
TLV	Transporter-Loader Vehicle
TLV	Threshold Limit Value
TM	Traffic   Model
TM	Time Management
TM	Telemetry
TM	Technical Management
TM	Table Maintenance
TM	Member Traceability
TMB	Transportation Management Bulletin
TMBU	Table Maintenance Block Update
TMC	Test Monitoring Console
TMECO	Time of Main Engine Cutoff
TMF	Transporter Maintenance Facility
TMG	Thermal Meteoroid Garment
TMI	Technical Management Items
TMO	Tool Manufacturing Order
TMO	Test Manufacturing Order
TMP	Time Management Processor
TMP	Terminal  Panel
TMPRY	Temporary
TMPV	Torquemotor Pilot Valve
TMR	Timer
TMU	Temperature Measurement Unit
TN	Technical  Note
TNL	Tunnel
TNT	Trinitrotoluene
TO	Operations Management (KSC Directorate)
TO	Operations Management (TS)
TO	Takeoff
TO	Task Order
TO	Technical Order
TOC	Test Operations Center
TOC	Test Operations Change
TOC	Total Organic Carbon
TOF	Test Operations Facility
TOG	Toggle
TOI	Transfer Orbit Insertion
TOL	Tolerance
TOO	Test Operations Order
TOO	Threshold of Odor
TOP	Technical Operating Procedure
TOPS	Transistorized Operational Phone System
TOS	Test Operating System
TOT	Total
TOW	Tank and Orbiter Weight
TP	Training Plan
TP	Type
TP	Turbo Pump
TP	Test Procedure
TP	Test Point
TP	True Position
TP	Transition Period (T.P. preferred)
TP	Test Port
TP	Time to Perigee
TP&C	Thermal Protection and Control
TPA	Test Preparation Area
TPAD	Trunnion Pin Attachment Device
TPC	Telemetry Preprocessor Computer
TPDS	Test Procedures DeveloPment System
TPE	Test Project Engineer
TPF	Tug Processing Facility
TPF	Transfer Phase Final
TPF	Terminal Phase Finish
TPF	Terminal Phase Finalization (Braking)
TPI	Terminal Phase Initiation
TPM	Terminal Phase Midcourse
TPM	Transfer Phase Midcourse
TPM	Terminal Phase Maneuver
TPM	Technical Performance Measurement (System)
TPM 1	Terminal Phase Midcourse #1
TPM2	Terminal Phase Midcourse #2
TPO	Test Program Out@ine
TPR	Teleprinter
TPR	Test  Problem   Report
TPS	Twisted Pair  Shielded
TPS	Test Preparation Sheet
TPS	Thermal Protection Subsystem
TPS	"Thermal Protection System (SR[3, ET, or Orbiter)"
TPS	Thermal protection system
TPSE	Thermal Protection Subsystem Experiments
TPUN	Test Procedure Update Notice
TR	Time to  Retrofire
TR	Transportation Request
TR	Test Request
TR	Thrust Reverser
TR	Technical   Report
TR/SBS	Teleoperator Retrieval/Skylab Boost System
TR2	Payload Furnished Mars Tape Recorder (2 of 2)
TRA	Turnaround Requirements Analysis
TRA	Training Requirei-nents Analysis
TRACS	Tool-Record Accountability System
TRAJ	Trajectory
TRANS	Translation
TRANS	Transition
TRANSL	Translation
TRB	Technical Review Board
TRB	Test Review  Board
TRBL	Troubleshooting
TRCP	Tape Recorder Control Panel (LIO)
TRD	Test Requirements Document
TRF	Tuned Radio Frequency
TRI	Payload Furnished Mars Tape Recorder (1 of 2)
TRK	Track
TRKR	Tracker
TRL	Test Readiness List
TRN	Trunnion
TRNG	Training
TRQ	Torque
TRR	Test Readiness  Review
TRRB	Test Readiness Review Board
TRS	Top Right Side
TRS	Tug Rotational System
TRS	Troubleshooting Record Sheet
TRS	Time Reference  System
TRS	Teleoperator Retrieval System
TRSD	Test Requirements Specification Document
TRUN ANG	Trunnion Angle
TS	Serial Traceability
TS	Technical Support (KSC Directorate)
TS	Tensile Strength
TS	Test Site
TS	Test Stand
TS	Test Station
TS	Time Scheduled
TS	Timing System
TSA	Test Start Approval
TSAC	Tracking System Analytical Calibration
TSB	Temporary Stowage Bag
TSB	Twin Sideband
TSC	Test Setup Complete
TSC	Test Support Coordinator
TSC	Two-Stage Command
TSCION	TSC 1/0 Number
TSCO	Test Support Coordination Office
TSCO	Test Support Coordinator
TSCP	Training Simulator Control Panel
TSD	Test Start Date
TSE	Transportation Support Equipment
TSGP	Test Sequence Generator Program (ESTEC)
TSLD	Troubleshooting Logic Diagram
TSM	Trade Study Management
TSM	Tail Service Mast
TSM	Tail service mast
TSO	Time Since Overhaul
TSO	Time Sharing Option
TSP	Twisted Shielded Pairs (Cables)
TSP	Test Software Program
TSR	Technical Status Review
TSR	Test Status Report
TSRA	Total System Requirements Analysis
TSS	Time Sharing System
TSS	TPS Summary Sheet Control
TSS	Tug Structural Support
TSSU	Test Signal Switching Unit
TST	Test
TSU	Time Standard Unit
TSW	Test Software
TSW	Test Switch
TT	Total Time
TT	Terminal Timing
TT	Thrust Termination
TT	Total Temperature
TT&C	Tracking Telemetry and Control
TT&C	"Tracking, telemetry and command"
TTA	Time to Apogee
TTA	Thermomechanical Test Area
TTC	Time to Circularize (Orbit)
TTC	"Telemetry, Tracking, and Command"
TTC	Tunnel Thermal Control
TTCA	Thrust Translation Controller Assembly
TTCV	"Tracking Telemetry, Command, and Voice"
TTE	Time to Event
TTE L	Tool and Test Equipment List
TTG	Time to Go
TTL	Transistor-Transistor Logic
TTLM	Through-the-Lens Light Metering
TTP	Time to Perigee
TTU	Timing Terminal Unit
TTV	"Termination, Test, and Verification"
TTY	Teletype
TU	Transport Unit
TU	Technical Utilization
TU	Technology Utilization
TUL	"Tula Peak, NM (STDN site)"
TURB	Turbine
TV	Transport Vehicle
TV	Television
TV	Thermal Vacuum
TV	Thrust Vector
TVA	Thrust Vector Alignment
TVAR	Test Variance
TVC	Thermal Vacuum Chamber
TVC	Thrust Vector Control
TVC	Thrust vector control
TVCA	Thrust Vector Control Actuator
TVCD	Thrust Vector Control Driver
TVCS	Thrust Vector Control System
TVEXPIS	TV Experiment Interconnecting Station
TVN	Test Verification Network
TVP	Test Verification Program
TVS	Toxic Vapor Suit
TVSA	Thrust Vector Control Servoamplifier
TVSSIS	TV Subsystem Interconnecting Station
TVT	Thermal Vacuum Test
TVTA	Thermal Vacuum Test Article
TW	Tailwind
TW	Thumbwheel
TW	Time Words
TW	Traveling Wave
TWD	Twisted Double Shielded
TWL	Total Weight Loss
TWR	Tower
TWT	Traveling Wave Tube
TWT	Trisonic Wind Tunnel (Rockwell)
TWTA	Traveling Wave Tube Amplifier
TWX	Teletype Wire Transmission
TX	Translation Hand Controller X-Axis Direction
TX	Transmit Channel
TX/RX	Transmitter/Receiver
TY	Translation Hand Controller Y-Axis Direction
TYP	Typical
TZ	Translation Hand Controller Z-Axis Direction
Tll	Tooling Inspection Instrumentation
[U]
U	Uranium
U-SB	Unified S-Band
U/C	Under Current
U/D	Update
U/L	Uplink (UPLK preferred)
U/M	Unit of Measure
U/M	Unmanned
U/M	Unscheduled Maintenance
U/O	Used on
U/V	Under Voltage
U/W	Used with
UA	Microampere
UB	Upper Brace
UB	UpUtility Bridge
UBE	Universal Bus Exercisor
UBIC	Universal Bus Interface Controller
UCD	Urine Collection Device
UCN	Uniform Control Number
UCPU	Urine Collection and Pretreatment Unit
UCR	Unsatisfactory Condition Report
UCTA	Urine Collection Transfer Assembly
UD	Update
UDB	Update Buffer
UDF	Utility and Data Flow
UDL	Updata Link
UDL	Update Link
UDMH	Unsymmetrical Dimethylhydrazine
UDMH/H	Unsymmetrical Dimethylhydrazine Hydrazine Blend
UDOP	Ultrahigh Doppler
UDS	Universal Documentation System
UER	Unique Equipment Register
UF	Microfarad
UFD	User File Directory
UG	Microgram
UHF	Ultrahigh Frequency
UHF	Ultrahigh frequency
UL	Upper Limit
UL	Underload
UL	Uplink
UL	Upper Left (S-Band Antenna)
ULA	"Fairbanks, Alaska (STDN Site)"
ULL	Ullage
ULO	Unmanned Launch Operations
ULT	Ultimate
UMB	Umbilical
UMBC	Umbilical Cord Cable
UMVF	Unmanned Vertical Flight
UNBAL	Unbalance
UNDK	Undock
UNDV	Undervoltage
UNIV	Universal
UNLCH	Unlatch
UNLK	Unlock
UP	Upper
UPLK	Uplink
UPP	User Parameter Processing
UPS	Uninterruptible Power Supply
UPS	Uninterruptible Power System
UPS	Upright Perigee Stage
UPTLM	UPlink Telemetry
UR	Unsatisfactory Report
UR	Upper Right
URA	Urine Receptacle Assembly
URN	Urine
URT	Upright
USA	United States of America
USAF	United States Air Force
USB	Upper Side Band
USB	Unified S-Band
USBE	Unified S-Band Equipment
USBI	"United Space Booster, Inc."
USBS	Unified S-Band System (Subsystem)
USEC	Microsecond
USN	United States Navy
USNS	United States Navy Ship
USRA	Universities Space Research Association
UST	Universal Servicing Tool
UST	United States Testing (Company)
UT	Unit Tester
UT	Universal Time
UT	Umbilical Tower
UT&GS	Uplink Text and Graphics System
UTC	Unit Test Cases
UTC	United Technology Center
UTC	Universal Test Console
UTC	Coordinated Universal Time
UTE	Universal Test Equipment
UTI L	Utility
UTLM	Up Telemetry
UTS	Urine Transfer System
UUT	Unit Under Test
UVD	Under Voltage Device
UVF	Unmanned Vertical Flight
Ul	User Interface
Ul	Unit of Issue
[V]
V	Velocity
V	Valve
V	Voice
V	Volt
V	Voltage
V	Verb
V&DA	Video and Data Acquisition
V&DA	Video and Data (Processing) Assembly
V&V	Validation and Verification
V-A	Vibro-Acoustic
V-A	Volt-Ampere
V-BAR	Velocity Vectory Axis
V-CITE	Vertical-Cargo integration Test EquiPment
V-RTIF	Vandenberg Real Time Interface
V/A	video/Analog
V/C	Vector Control
V/C	Velocity Counter
V/H	VelocitY-to-Height
V/M	Velocity Meter
V/V	Vent Valve
V/V	Validation and Verification (also V&V)
VA	Vibro-Acoustic Test
VA	Velocity at Apogee
VA	Volt Ampere
VA/T/VTA	Vibro-Acoustic/Thermal/Vacuum Test Article
VAA	Viewpoint Adapter Assembly
VAA	Vehicle Assembly Area
VAB	Vehicle Assembly Building
VAB	Vehicle Assembly Building
VAC	"Volts, ac"
VAC	Vehicle Assembly and Checkout
VAC	Vacuum
VAD	Vandenberg Addendum Document
VAFB	Vandenberg Air Force Base
VAFB	Vandenberg Air Force Base
VAK	Vertical Access Kit
VAK	Vertical Assembly Kit
VAL	Valid
VALID	Validation
VAN	USNS Vanguard (STDN)
VAP	Vapor
VAR	"Variable, Variance, Variation"
VAR	Verification Analysis  Report
VAR	Volt Ampere Reactive
VASI	Visual Approach Slope Indicator
VAST	Versatile Avionics System Tester
VAT	Vibro-Acoustic Test
VATA	Vibro-Acoustic Test Article
VATF	Vibration and Acoustic Test Facility
VCAP	Vehicle Charging and Potential Experiment
VCB	Vertical Location of the Center of Buoyancy
VCD	Verification Control Document
VCD(S)	Vapor Compression Distillation (Subsystem)
VCE	Voice
VCG	Vertical Location of the Center of Gravity
VCG	Vector Cardiogram
VCN	Verification Completion Notice
VCP	Vandenberg Contract Report
VCT	Voltage Control Transfer
VCTR	Vector
VCU	Video control unit
VDA	Valve Driver Assembly
VDA	Variable Data Area
VDC	"Volts, dc"
VDD	Version Description  Document
VDD	Verification Description Document
VDI	Vendor Documentation Inventory
VDI	Vertical Display Indicator
VDS	Vehicle Dynamics Simulator
VDT	Vehicle Data Table
VDU	Visual Display Unit
VE	Equivalent Velocity
VE	Vehicle Engineering (KSC VBO Directorate)
VECIB	Vehicle  Engineering Change IMplementation Board
VECO	Vernier  Engine Cutoff
VEDS	Vehicle  Emergency Detection System
VEEI	Vehicle  Electrical Engine Interface
VEFCO	Vertical Functional Checkout
VEH	Vehicle
VEH ID	Vehicle  Identification
VEI	Vehicle  End Item
VEL	Velocity
VER	Verify
VERIF	Verification
VERLORT	Very Long Range Tracking Radar
VERN	Vernier
VERT	Vertical
VF	Video Frequency
VF	Vertical Flight
VFE	Vendor Furnished EquiPment
VFI	Verification Flight Instrumentation
VFM	View finder monitor
VFO	Variable Frequency Oscillator
VFR	Visual Flight Rules
VFT	Verification Flight Test
VGIMU	Velocity To Be Gained as Related to IMU Orientati
VGOR	Vandenberg Ground Operations Requirement
VGOR	Vehicle Ground Operation Requirements
VGP	Vehicle Ground Point
VGT	Vehicle Ground Test
VGVT	Vertical Ground Vibration Test
VGX	Velocity To Be Gained (Body X-Axis)
VGY	Velocity To Be Gained (Body Y-Axis)
VGZ	Velocity To Be Gained (Body Z-Axis)
VHAA	Very High Altitude Abort
VHF	Very high frequency
VHF	Very High Frequency
VHF/AM	Very High Frequency Amplitude Modulator
VHF/DF	Very High Frequency Direction Finder
VIA	By Means of (By Way of)
VIB	Vertical Integration Building
VIB	Vertical Integration Building
VIB	"Vibrate, Vibration"
VID	Video
VIDD	Vertical Interval Data Detector
VITT	Vehicle Integration Test Team
VIU	Video interface unit
VL	Expendable Vehicles (KSC VO Dir.)
VLBI	Very Long Baseline Interferometer
VLF	Very Low Frequency
VLPS	Vandenberg Launch Processing System
VLR	Very Low Range
VLS	Vandenberg Launch and Landing Site
VLV	Valve
VLV	Value
VMF	Vertical Maintenance Facility
VO	Velocity Initial
VO	Vehicle Operations
VO	Shuttle Operations (KSC Directorate)
VO	Space Vehicle Operations (KSC Dir.)
VO	Voice
VOIR	Venus Orbiter Imaging Radar
VOL	Volume
VOMD	VAFB Operations and Maintenance Documentation
VOR	VHF Omnidirectional Radio Range
VOR-DME	VHF Omni Range-UHF Distance Measuring Equipment
VORTAC	Variable Omni Range Tactical (VOR and TACAN)
VORTAC	VHF Omni Range Tactical Air Navigation
VOT	VHF Omni Test
VP	Viewpoint
VP	Vertical Polarization
VP	Verification Polarization
VP	Vacuum Pump
VP	"Shuttle Payloads (KSC VO Dir., see CO, CS, CV@"
VPF	Vertical Processing Facility
VPF	Vertical Processing Facility
VPHD	Vertical Payload Handling Device
VPI	Valve  Position  Indicator
VPK	Volts Peak
VPM	Vehicle  Project   Manager
VR	Velocity Relative
VR	Voltage Regulator
VR	Variable Reluctance
VR	Video Recorder
VR	Voltage Relay
VRB	VHF   Recovery    Beacon
VRCS	Vernier Reaction Control System
VREL	Relative Velocity
VRF	Vertical  Removal  Fixture
VRL	Vertical  Recovery  Line
VRL	Vertical Reference Line
VRMS	Volts  Root  Mean   Square
VRNR	Vernier
VRR	Verification Readiness Review
VSA	Verification Site Approval
VSA	Variable Stability Aircraft
VSB	Vestigial Side Band
VSD	Vertical Situation Display
VSN	Video  Switching   Network
VSTAG	Vandenberg Shuttle Turnaround AnalYsis Group
VSWR	Visual Standing Wave Ratio
VSWR	Voltage Standing Wave Ratio
VT	STS Processing (KSC VO Dir.)
VT	Vent
VTF	Vertical Test Flight
VTM	Vibration Test Module
VTN	Verification  Test   Network
VTP	Verification Test Plan
VTP	Vehicle Test Plan
VTP	Verification Test    Program
VTR	Video tape recorder
VTR	Video Tape Recorder
VTR	Verification  Text   Reports
VTS	Vertical Test Stand
VTS	Vertical Test Site
VTS	Vertical Test System
VTS	Vandenberg Tracking Station
VTVM	Vacuum   Tube    Voltmeter
VTX	Vertex
VY	Velocity along the  Y-Axis
[W]
W	Wide
W	Watt
W	West
W	Window
W&B	Weight and Balance
W&C	Wire and Cable
W-G	Water-Glycol
W/	With
W/B	Wideband
W/E	Wing Elevon
W/G	Water/Glycol
W/H	Watt-Hour
W/O	Without
W/S	Work Station
W/T	Wind Tunnel
W/W	Wheel Well
W/W	Weather
W/WMS	Water/Waste Management System (Subsystem)
W/Y	Wrist Yaw
WA	Work Authorization
WA	Wide Angle
WAD	Work Authorization Document/Shop Order
WAD/NU	Work Authorization Number
WAR	Work Authorization Report
WARN	Warning
WAT	Web Action Time
WB	Waterboiler
WBC	White Blood Cells
WBDI	Wideband Data Interleaver
WBR	Work Bench Rack
WBS	Work Breakdown Structure
WBSC	Wide-band signal conditioner
WBSC	Wide-Band Signal Conditioner
WBT	Wide-Band Terminal
WCCU	Wireless crew communication unit
WCLS	Water coolant loop system
WCS	Waste collection system
WMC	Waste management compartment
WONG	Weight on nose gear
WOW	Weight on wheels
WP	Way point
WSB	Water spray boiler
WSGT	White Sands Ground Terminal
WSTF	White Sands Test Facility
WTR	Western test range
WTR	Western Test Range
WTR SYS	Water System
WTSC	Wet Tantalum Slug Capacitor
WTT	Wind Tunnel Test
WUCF	Work Unit Code File
WUC	Work Unit Code
WUSCI	Western Union Space Communications, Inc.
WW	Water Waste
WW	Wire Wrap
WWMS	Waste Water Management System
WX	Weather
[Additional Acronyms (Unsorted)]
i@@PL	Implement
iSCM	JSC Manual
icio	Interim Cargo Integration Operations
icmo	"Integrated Configuration I""anagement Office"
icms	Indirect Cost Management SYstem
ico	Integrated Checkout
icos	improved Crew Optical Sight
icou	Inertial Coupling Data Unit
icw	Interrupted Continuous Wave
iis	Joint Integrated Simulation
iis	InsPection Item Sheet
imu	Inertial Measurement Unit
imu	Internal Measurement Unit
in.	Inch
instrument/	instrument/Communication EquiPment
ioc	Joint Operations Center
ioc	Indirect Operating Costs
ioc	Initial Operational Capability
ioc	Input/Output Controller
iocu	Input/Output Control Unit
iosc	Integrated Operations Support Center
isc	Johnson Space Center (formerly MSC)
isi	Initial Systems Installation
isi	Instrumentation support Instruction
iso	International Standardization Organizations
iss	Integrated System Schematic
iss	Instruction Summary Sheet
iss	Installation Support Services
iss	Inertial Subsystem
iss	Inhibit/Override Summary Snapshot Display
iu	Interface Unit
iu	instrument Unit
ius	Inertial UPper Stage (was Interim UPper Stage)
ius	Interim/intermediate UPper State
ius	International Ultraviolet ExPlorer
ius	interim Use Sheet
iv	Intravehicular
iv	Interface Volume
iv	Interior Upper Stage
iv	integrated Vehicle
iv	Initial Velocity
ivc	Intervehicular Communications
ivsi	Instantaneous Vertical Speed Indicator
jp	Jet  Propulsion
jp	Jet  Propellant
jpp	Joint Program Plan
k	Kilo (1000)
kHz	Kilohertz
kV	Kilovolt
kVA	Kilovoltampere
kWh	Kilowatt Hours
kbps	kilobits per second
kcal	Kilocalorie
kg	Kilogram
kgal/min	Kilogallons per Minute
kib	KiloPounds
kill	Kilowatt
km	Kilometers
lMCC	Integrated Mission Control Center
landC	Instrumentation and Communication
lb	Pound
lc	Incremental Cost
lc	Integrated Circuit
lc	Information Center
lc	Interim Change
lc	Intercomputer
lc	Intercommunications
lc	Intercom (Orbiter to Ground via Hardline)
lc	Ion Chamber
lc	Internal Combustion
lc	Initial Condition
lcs	Instrumentation Control SYstem
lcu	Inertial Components Temperature Controller
lm	Inner Maker
lm	Interface Module
lm	Intermediate Moisture
lm	Information        Memory
lms	Information Management System
lms	Inventory Management System
lom	Input/Output Module
lop	Integrated Operation Plan
lop	In-Orbit Plane
lop	Input/Output Port
lop	Input/Output Processor
los	Input/Output Supervision
los	InstruCtor Operator Station
los	Indian Ocean Ship (STDN)
lou	Input/Output Unit
lsu	International System of Units
lucs	Instrumentation Update Command SYstem
lucs	Instrumentation Unit Update Command System
m	Monitor (MON preferred)
m	Number of Revolutions Required for the Rendezvous
m	Manual
m	Mercury
m	Mass
m	Male
m	Meter
m	Missing (Data)
m	Mach
m	Matrix
m	Mandatory
m	Major Cycle
m	Maintainability
m	Million
m	Mega
m	Middle
m   isc	Miscel laneous
m   lss	Mission
m  PSS	Main Parachute Support Structure
m icom	Missile Command (Army)
m lcs	Management Information and Control system
m-kg	Meter-Kilogram
mA	Milliampere
mPuter Simu	mPuter Simulator
mc	Memory Configuration
mc	Mission Capability
mc	Mission Completion/Continuation
mcc	Main Combustion Chamber
mcc	Mission Control Center (JSC)
mcc	Motor Control Center (JSC)
mccc	Mission Control and Computing Center
mccs	Mission  Control Center Simulation (System)
mco	Mission Control Operations
mcs	Measurements Calibration System
mcs	Maintenance and  Checkout  Station
mcu	Mission Control Unit
mcu	Master Control Unit
mcw	Modulated Continuous Wave
mg	Milligram
mi	Mile
mi	Management Information
mi	Mechanical Joint
mic	Management Information Center
mills	Modular Integrated Utility Systems
min	Minute
mio	Management Integration Office
mios	Multi-IMU Operation System
mis	Mission Information Subsystem
mis	Management Information System
mis	Manipulator Jettison System (Subsystem)
miu	Multiplex  Interface  Unit
mm	Main Module
mm	Major Mode
mm	Man-Month
mm	Mass Memory
mm	Main Memory
mm	Mission Manager
mm	Math Model
mm	Millimeter
mmc	Martin Marietta Corporation
mmc	Mission Management Center
mmos	Multimode Optical Sensor
mms	Mission Modular Spacecraft
mms	Modular Multiband Scanner
mms	Multimission Modular Spacecraft
mmu	Manned Maneuvering Unit
mmu	Mass Memory Unit
mo	Major Objective
mo	Manned Orbiter
mo	Middeck Overhead
mo	Mission Operations
mo	Manual Orientation
mo	Master Oscillator
mo	Move
mo	Manufacturing Order
moc	Marine Operation Center
moc	Mission Operations Computer
mocs	Multichannel Ocean Color Sensor
mocv	Manual 02 Control Valve
mom	Moment
mou	Memorandum of Understanding
mov	Main Oxidizer Valve
mow	Mission Operations Wing
msc	Manned Spacecraft Center (changed to JSC)
msc	Master Sequence Controller
msc	Materials Service Center
msc	Military Sealift Command
msc	Moding Sequencing and Control
msec	Millisecond
msi	Maintenance Significant Items
msi	Medium Scale Integration
msm	Manned  Support   Module
mso	Model for Spare(s) OPtimization
msocc	Multisatellite Operations Control Center
mss	Multispectral scanner System
mss	Mobile Service Structure
mss	Mission  Status  Summary
mss	Manufacturers Standardization Society
mss	Maintenance Status System
mss	Mechanical Support Systems
mss	Mission Specialist Station
msu	Mass Storage Unit
msu	Measuring Stimuli Units
msv	Monitored Sine Vibration (Test)
msw	Microswitch
mu	Master Unit
mu	Mobile Unit
mu	Mockup
mu	Multiple Unit
mums	Multiple Use Marc System
muss	Module Utility Support Structure
mux	"Multiplex,   Multiplexer"
mv	Manual Valve
mv	Millivolt
mv	Manufacturing Verification
mvc	Master  Volume   Control
mvc	Manual  Volume   Control
mvm	Mariner    Venus/Mercury
mvs	Middle Value Select
mvs	Multiple Virtual Storage
mw	Man Week
mw        M	mw        Milliwatt
mw        M	mw        Microwave
mwv       M	mwv       Maximum Working Voltage
mx        M	mx        Multiplex
nm	Nanometer
nmi	Nautical mile
nt	Newton
oc	Overcurrent
oc	On Center
oc	Orbital Check
oc	Open Circuit
oc	On-Condition
oc	Quality Control
occ	Office of Contract Compliance
occ	Operations Control Center
ocm	Organic Content Monitor
oco	OMS Cutoff
oco	Open-Close-Open
ocs	Onboard Checkout System
oic	Orbiter (Orbital) Integrated Checkout
ois	Operational Intercommunication System
ois	Orbiter Instrumentation Systems
oiv	Oxidizer Isolation Valve
oivs	Orbiter Interface Verification Set
omc	Orbiter Maintenance and Checkout
omi	Operations and Maintenance Instruction
oms	Orbital Maneuvering Subsystem
omu	Optical Measuring Unit
omv	Oxygen Manual Valve
oomm	Organizational Operations and Maintenance Manual
oos	Orbit-to-Orbit Stage
oos	Orbit-to-Orbit Shuttle
oos	On-Orbit  Station
os	Operating Software
os	On-Orbit Station
os	OPtics Subsystem
os	Operating System
os	Orbiter CEI Specification
osc	Oscillator
osm	Orbital Service Module
oso	Ocean SYstems Operation
oss	Orbiting Space Station
oss	OPtics Subsystems
oss	Office of Space Science
oss	OEX SuPport System
oui	"Quito, Ecuador (STDN)"
ov	Oxygen Vent
ov	Orbiter Vehicle
ovco	Operational Voice Communication Office
ovi	Operational Validation Inspection
ovs	Operational Voice System
ovv	Overvoltage
ow	Optical Window
ox	Oxidizer
oz	Ozone
oz	Ounce
p	Pilot
p	Period
p	Pitch
p	Pallet (Spacelab)
p	Pressure
p	Pole
p	Roll Rate (Angular Rate)
p	Prime
p	Primary
pH	Hydrogen-Ion Concentration (Alkalinity)
pp	Power Pole
pp	Program Performance
pp	Push-Pull
pp	Partial Pressure
pp	Planning Package
ppp	Peak Pulse Power
psf	Pounds per Square Foot
psi	Pounds per Square Inch (Static Pressure)
psi	Pounds per square inch
psia	Pound per Square Inch Absolute
psia	Pounds per square inch absolute
psid	Pounds per Square Inch Differential
psid	Pounds per square inch differential
psig	Pounds per Square Inch Gage
psig	Pounds per square inch gauge
psis	Pounds per Square Inch Sealed
py	Program Year
rad	Radiation equivalent dose
rem	Roentgen equivalent in man
rms	Root mean square
s	Stere
s	Second (Astronomical Tables)
s	Second
s	Side
s	Sta r
s@mscc	SYstem
s@mscc	Shuttle Mission Simulator Computer Complex
sccm	Standard Cubic Centimeters per Minute
sci	Switch Closure In
scis	Standard Cubic Inches per Second
sco	Subcarrier Oscillator
sco	Stiper Critical Oxygen
sco	Switch Closure out
sco	Start Checkout
scos	Subsystem Computer Operating System
scs	Secondary Coolant System
scs	Spacecraft Control System
scs	Stabilization and Control SYstem (Subsystem)
scu	Secondary Control Unit
scu	Sequence Control Unit
scu	Service and Cooling Umbilical
scu	Signal Conditioning Unit
scu	Signal Control Unit
sec	Second
sec	Source Evaluation Committee
secs	Standard Cubic Centimeters per Second
si	Center Support Operations (KSC Directorate)
si	International System of Units (ISU preferred)
si	Solar inertial
si	Scientific Instrument
sim	"Simulate, Simulation"
sim	Scientific Instrumentation Module
simo	Simultaneously
simu	Simulated Inertial Measurement Unit
sio	Systems Integration Office
sio	Serial Input/output
sis	Scanning Imaging Spectrometer
sis	Shuttle Information System
sis	Serial Input Special
sis	SAIL Interface System
sis	Software Implementation Specification
sis	Software Integrated Schedule
sis	Standard Interface Specification
sis	Systems Integration Schedule
sis	Shuttle Interface Simulator
sis	SiMUlator Interface SYstem (SubsYstem)
siu	Signal Interface Unit
siv	Sieve
sm	Shuttle Management (KSC)
sm	SOft Manual
sm	Support Module
sm	short Module
sm	Stable Member
sm	SYstems Management
smc	Scientific ManPower Commission
smcc	Shuttle Mission Control Center
smcs	Separation Monitor and Control System
smcu	Separation Monitoring Control Unit
smm	Solar Maximum Mission
smm	Subsystem Measurement Management
smoc	Simulation Mission Operation Computer
sms	Solar Maximum Satellite
sms	Separation Mechanism SubsYstem
sms	Shuttle Mission Simulator
sms	Synchronous Meteorological Satellite
smu	SOft Mockup
smw	Standard Materials Worksheet
so	SuPport Operations (KSC Dir.)
so2	Sulphur Dioxide
soc	Simulation Operations Center
soc	Simulation Operation ComPuter
soc	SYstem OPtion Controller
socc	Satellite Operations Control Center
socs	Subsystem Operation and Checkout System
som	Spares OPtimization Model
som	Standard Operating Manual
som	Ship Operations Manager (NASA)
soms	Shuttle Orbiter Medical System
sos	Stabilized OPtical Sight
sos	Source of Supply
sos	Serial OutPut Special
sov	Solenoid Operated Valve
sov	Shut-off Valve
sow	Statement of Work
sow	Square Wave
sow	sox        Supercritical Oxygen
sow	Subdivision of Work
sow	Start of Word
sq ft	Square Feet
ssc	Subsystem Sequence Controller
ssc	Subsystem Computer
ssc	Solid-Solution Cermet
ssc	Single-Stage Command
ssc	Shuttle System Contractor
sscc	Support Services Control Center
ssi	Significant Structural Item
ssm	Support System Module
ssm	Systems Support Module
ssm	SPacecraft Systems Monitor
ssm	Subsystem Manager
sso	SuPport System for OEX
sso	Safety Signification Operation
sso	Source Selection Official
sso	Space Shuttle Orbiter
sso	Subsystem Operation (in  Spacelab)
sss	Sound Suppression System
sss	Space  Shuttle   System
sss	Stage Separation Subsystem
sss	Station Set Specification
sss	Subsystem Segment
ssss	Space Shuttle System Specification
ssus	Spinning Solid Upper Stage
ssv	Space  Shuttle  Vehicle
su	Support Unit
sum	Summary
sumc	Space Ultrareliable Modular Computer
summ	Summary
sums	Shuttle Upper-Atmosphere Mass Spectrometer
susim	Solar Ultraviolet Spectral Irradiance Monitor
sv	Selenoid Valve
sv	Space Vehicle
sv	State Vector
sv	Shuttle Vehicle
sv	Safety Valve
svc	Supervisor Call
svo	Space Vehicle Operations (KSC Dir.)
svs	Suit Ventilation System
sw	Sea Water
sw	Switcher (Switch)
sw	Status Word
sw	Solar Wing
sw	Software (SFTWE preferred)
sw	Short Wave
sws	Switch Scan
u	Underfloor
uc	Unsatisfactory Condition
ucc	Universal Checkout Console
ucs	Universal Control System
ucs	UnUtilities Control System
umo	Unmanned Orbital
us	Upper Stage
us	United States
usi	Update Software Identity
uss	Utility Support Structure
uss	United States Ship
uss	United States Standard
uu	Micromicron
uv	Ultraviolet
uv	Under Voltage (U/V preferred)
uv	Microvolt
uw	Microwatt
uws	User Work Station
v P-P	Volt Peak-to-Peak
vc	Velocity Counter
vc	Vector Character
vcc	Verification Code Counter
vci	Velocity Change Indicator
vcm	Volatile Condensable Material
vco	Voltage Controlled Oscillator (Oscillation)
vcs	Verification Control Sheet
vcs	Voice Command System
vcu	Video Control Unit
vi	Internal Velocity
vi	Vacuum Jacketed
vic	Visitors Information Center
vis	Visual
vis	Verification information System
vis	Visibility
visc	Viscosity
viu	Video Interface Unit
vm	Voltmeter
vm	Virtual Memory
vms	Velocity Measuring system
vom	Voltohmmeter
vox	Voice Operated Transmitter (Transmission)
vs	Staging Velocity
vs	Versus
vsi	Vertical Speed Indicator
vsi	Video Simulation Interface
vso	Very Stable Oscillator
vu	Vehicle   Unit
vu	Vehicle Utility
vu	Volume    Unit
vv	Vent Valve
vv	Vertical Velocity
vvi	Vertical Velocity  Indicator
vx	Velocity along the  X-Axis
vz	Velocity along the  Z-Axis