U.S. Department of Homeland Security
Federal Emergency Management Agency

	FEMA

Acronyms
Abbreviations
and
Terms
	
The FAAT List is not designed to be an authoritative source, merely a handy reference.  Inclusion recognizes terminology existence, not legitimacy.  Entries known to be obsolete are included because they may still appear in extant publications and correspondence.

Your comments and recommendations are welcome.  Please electronically forward your input or direct your questions to: 

FEMA-FAAT@dhs.gov	Please direct requests for additional copies to:
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Or download the document from the Web:

www.fema.gov/library/femainfo.shtm
 	 
A	Atomic Mass/Ampere/Activity of Isotope
AA	1) Affirmative Action
	2) Allocation Advice
	3) Applicant Assistance
	4) Approval Authority
	5) Atomic Absorption
AAA	1) Agriculture Adjustment Administration
	2) American Automobile Association
AAAE	American Association of Airport Executives
AAC	1) Activity Address Code
	2) Applicant Assistance Center
AACS	Automated Access Control System
AAD	Assistant Associate Director
AADR	Age-Adjusted Death Rate
AAEI	American Association for Exporters and Importers
AAER	Average Annual Erosion Rate
AAFB	Andrews Air Force Base
AAMS	Automated Acquisition Management System (ProTrac / ProDoc)
AAMVA	American Association of Motor Vehicle Administration
AAPA	American Association of Port Authorities
AAR	1) After-Action Report
	2) After action Review
	3) Association of American Railroads
AARP	American Association of Retired Persons
AASHTO	American Association of State Highway and Transportation Officials
AAU	Association of American Universities
ABA	1) American Bankers Association
	2) American Bar Association
ABAG	Association of Bay Area Governments
ABC	1) American Baptist Churches
	2) Associated Builders and Contractors
ABCO	Automated Billing & Collection Offsets
ABF	Automatic Broadcast Feed
ABM	Anti-Ballistic Missile
ABMC	American Battle Monuments Commission
ABNCP	Airborne Command Post
ABO	Agents of Biological Origin
ABS	Arson and Bomb Squad
AC	1) Alternating Current
	2) Area Committee
ACAA	Air Carrier Association for Americans
ACADA	Automatic Chemical Agent Detection and Alarm
ACAMS	Automatic Continuous Air Monitoring System
ACAP	1) Agency-wide Corrective Action Program
	2) Alien Criminal Apprehension Program
ACBIRC	Advanced Chemical/Biological Integrated Response Course
ACC	1) Agency Command Center
	2) Air Combat Command
	3) American Chemistry Council
	4) Aviation Command Center
ACCS	Accounting Classification Code Structure
ACDA	[US] Arms Control and Disarmament Agency
ACE	1) American Council on Education
	2) Army Corps of Engineers
	3) Automated Commercial Environment (secure data portal)
	4) Automated Construction Estimate
ACF	1) Administration for Children and Families
	2) Alternate Care Facility
ACFM	Advanced Certified Floodplain Manager
ACGIH	American Council of Government Industrial Hygienists
AChE	Acetylcholinesterase
ACHP	Advisory Council on Historic Preservation
ACI	1) Advanced Contracting Initiative
	2) Airports Council International
	3) Approved Course of Instruction
ACI/NA	Airports Council International--North America
ACIP	Advisory Committee on Immunization Practices
ACIR	Advisory Commission on Intergovernmental Relations
ACO	1) Administrative Contracting Officer
	2) Agency Claims Officer
	3) Agency Collection Officer
ACP	1) Accelerated Conversion Process
	2) Access Control Point
	3) Allied Communications Publication
	4) Alternate Command Post
	5) Area Command Post
	6) Area Contingency Plan
ACPSEM	Advisory Council on Professional Standards for Emergency Managers
ACR	1) Acreage Conservation Reserve
	2) Agency Confirmation Report
	3) Advance Confirmation Report
ACS	1) Adventist Community Services
	2) Alternate Command Staff
ACSM	American Congress of Surveying and Mapping
ACTD	Advanced Concepts Technology Demonstration
ACT FAST	Agent Characteristics Toxicity - First Aid and Special Treatment
ACV	Actual Cash Value
ACWG	Air Cargo Working Group
A/D	Analog/Digital
AD	1) Administratively Determined
	2) Assistant Director
	3) Associate Director
ADA	Americans with Disabilities Act
ADAMS	Automated Disaster Assistance Management System
ADASHI	Automated Decision Aid System for Hazardous Incidents
ADD	Automated Deployment Database
ADDS	Automated Disaster Deployment System
ADEM	Arkansas Department of Emergency Management
ADES	Alaska Division of Emergency Services
ADGGS	Alaska Division of Geological and Geophysical Surveys
ADIS	Arrival and Departure Information System
ADIZ	Air Defense Identification Zone
ADM	Acquisition Decision Memorandum
ADMIN	Administration
ADMSYS	Admissions System
ADO	Airport District Office
ADOS	Automated Document Ordering System
ADO Team	Assistant Disbursing Officer Team
ADP	Automated Data Processing
ADPE	Automated Data Processing Equipment
ADR	American Disaster Reserve
ADRA	1) Act Adventist Development and Relief Agency
	2) Alternative Dispute Resolution
ADRS	Automated Disaster Reporting System
ADVON	Advanced Echelon
A&E	Architectural and Engineering
AE	1) Aeromedical Evacuation
	2) Architects and Engineering
AEA	American Economic Association
AEC	1) Agency Emergency Coordinator(s)
	2) Atomic Energy Commission
AECB	Atomic Energy and Control Board
AECC	1) Aeromedical Evacuation Coordination (or Control) Center
	2) American Evangelical Christian Church
AECE	Aeromedical Evacuation Control Element
AECM	Aeromedical Evacuation Crew Members
AECR	Achieving Extraordinary Customer Relations
AEGL	Acute Exposure Guidelines Level
AEI	American Enterprise Institute
AEIC	Alaska Earthquake Information Center
AEL	1) Adverse Effect Level 
	2) Airborne Exposure Limit
AELT	Aeromedical Evacuation Liaison Team
AEMA	Alabama Emergency Management Agency
AEOD	Analysis and Evaluation of Operation Data
AEP	Airport Emergency Plan
AERT	Alaska Emergency Response Team
AES	1) Aeromedical Evacuation System
	2) Automated Export System
AEW	Airborne Early Warning
A&FM	Aviation and Fire Management
AF	1) Acre Feet
	2) Air Force
AFA	Association of Flight Attendants
AFB	Air Force Base
AFCEA	Armed Forces Communications and Electronics Association
AFD	Airport Facility Directory
AFEM	Alliance for Fire and Emergency Management
AFGE	American Federation of Government Employees
AFGP	Assistance for Firefighters Grant Program
AFGWC	Air Force Global Weather Central
AFMLS	Asset Forfeiture & Money Laundering Section
AFMS	Automated Forms System
AFNSEP	Air Force National Security Emergency Preparedness
AFOSC	Air Force Operations Support Center
AFRAS	Association For Rescue At Sea
AFRAT	Air Force Radiation Assessment Team
AFRB	Air Force Reserve Base
AFRCC	Air Force Rescue Coordination Center
AFRES	Air Force Reserve
AFRRI	Armed Force Radiobiology Research Institute
AFSOF	Air Force Special Operations Forces
AFSS	Automated Flight Service Station 
AFTAC	Air Force Technical Applications Center
AG	1) Adjutant General
	2) Agriculture
	3) Attorney General
AGAR	Alternate Governor's Authorized Representative
AGC	1) Advanced Gas Centrifuge
	2) Association of General Contractors
AGCA	Associated General Contractors of America
AGCR	Advanced Gas-Cooled Reactor
AGE	Aerospace Ground Equipment
AGL	Above Ground Level
AGS	Aviation Group Supervisor
AGZ	Actual Ground Zero
AH	Alternate Headquarters
AHCC	Alternate Host Communications Center
AHG	Ad Hoc Group
AHJ	Agency Having Jurisdiction
AIA	1) American Institute of Architects
	2) American Insurance Association
AIATP	Antiterrorism Intelligence Awareness Training Program
AIC	Automated Inventory Control (formerly AIS)
AID	Agency for International Development
AIF	Assistance Information Form
AIG	Address Indicating Group
AI&H	Assistance to Individuals and Households
AIMS	1) Arson Information Management System
	2) Automated Inventory Management System
AIP	1) Agreement In Principle
	2) Airport Improvement Program
AIR	Applied Insurance Research
AIREP	Aircraft Report
AIS	1) Automated Information System(s)
	2) Automatic Identification System
AIT	Aeromedical Isolation Team
AKA	Also Known As
AKDT	Alaska Daylight Time  (GMT - 8)
AKST	Alaska Standard Time  (GMT - 9)
AL	Applicant Liaison
ALARA	As Low As Reasonably Achievable
ALC	1) Agency Location Code
	2) Agency Logistics Center
	3) Annual Letter of Certification
ALCC	1) Airlift Control Center
	2) Airlift Coordination Cell
ALCE	Airlift Control Element
ALCOM	Alaskan Command
ALE	1) Additional Living Expenses
	2) Automatic Link Establishment
ALERT	Automated Local Evaluation in Real Time
ALOHA	Aerial Locations Of Hazardous Atmospheres
ALPA	Airline Pilots Association
ALS	Advanced Life Support
ALSM	Airborne Laser Swath Mapping (aka LIDAR)
ALTRETCO	Alternate Regional Emergency Transportation Coordinator
AM	1) Amplitude Modulation
	2) Ante Meridiem
AMA	American Medical Association
AMB	Air & Marine Branch
AMBUS	Ambulance Bus
AMC	1) Air Mobility Command 
	2) Army Materiel Command
AMCCOM	Armament Munitions and Chemical Command
AMF	Alternative Morgue Facility
AMGS	Air & Marine Group Supervisor
AMHS	Automated Message Handling System
AMID	Air and Marine Interdiction Division
AMIO	Alien Migrant Interdiction Operations
AML	ARC Macro Language
AMO	Air and Marine Operations
AMOC	Air and Marine Operations Center
AMPS	Automated Message Processing System
AMR	Agricultural Mitigation and Restoration
AMS	1) Aerial Measuring System
	2) American Meteorological Society
	3) Atmospheric Monitoring System
	4) Automated Manifest System
AMSC	American Satellite Communications
AMSLAN	American Sign Language
AMT	Amount
AMTI	Applied Marine Technology, Inc.
AMTOR	Amateur Telegraphy Over Radio
AMWA	Association of Metropolitan Water Agencies
A/N	Alert/Notification
AN	1) Above Normal
	2) Alert and Notification (see also A/N)
ANAD	Anniston Army Depot
ANCA	Anniston Chemical Activity
ANCDF	Anniston Chemical Disposal Facility
ANFO	Ammonium Nitrate and Fuel Oil
ANG	Air National Guard
ANGB	Air National Guard Base
ANI	1) American Nuclear Insurers
	2) Area Not Included
ANL	Argonne National Laboratory
ANOC	Association of National Olympic Committees
ANPR	Advance Notice of Proposed Rulemaking
ANPSC	Alternate National Processing Service Center 
ANRC	American National Red Cross
ANS	1) Alert and Notification System
	2) Aquatic Nuisance Species
ANSER	Analytic Services, Inc.
ANSI	American National Standards Institute
ANZUS	Australia, New Zealand and United States
AO	1) Action Officer
	2) Administrative Officer
	3) Area of Operations
	4) Assistance Officer
AoA	Administration on Aging
AOA	Aviation Operations Area
AOC	1) Aircraft Operating Center (NOAA)
	2) Area of Concern
	3) Army Operations Center
AOIC	Acting Official in Charge
AOR	Area of Responsibility
AOSSP	Aircraft Operator Standard Security Program
AOV	Agency Owned Vehicle
AP	1) Aerial Port
	2) Alternate Power
	3) Assembly Point
	4) Associated Press
APA	1) American Planning Association
	2) Administrative Procedure Act
APB	Acquisition Program Baseline
APCO	Association of Public-Safety Communications Officials, International
APE	Area of Potential Effect
APEC	Asia Pacific Economic Cooperation
APG	Aberdeen Proving Ground
APHA	American Public Health Association
APHIS	Animal and Plant Health Inspection Service 
APHL	Association of Public Health Laboratories
API	Application Programming Interface
APIS	1) Administrative and Program Information System
	2) Advanced Passenger Information System
APO	Accountable Property Officer
APOD	Aerial Port of Debarkation
APOE	Aerial Port of Embarkation
APP	Application or Applicant
Apps	Applications
APR	1) Agency Procurement Review
	2) Air-Purifying Respirator
APRSAC	Academe and Policy Research Advisory Committee
APSO	Asylum Pre-Screening Officer
APSP	Automated Passenger Screening Profile
APSRS	Aerial Photography Summary Record System
APSS	Automated Personnel Security System
APT	Administrative Payment Team
APTA	American Public Transportation Associations
APWA	American Public Works Association
AQI	Agricultural Quarantine Inspections
AR	1) Acknowledge Receipt
	2) Aerial Reconnaissance
	3) Army Regulation
ARA	Aircraft Rental Agreement
ARAA	Advanced Radiological Accident Assessment
ARAC	Atmospheric Release Advisory Capability
ARC	American Red Cross (also RC) [ESF-6]
ARCA	Area Requiring Corrective Action
ARCHIE	Automated Resource for Chemical Hazard Incident Evaluation
ARES	Amateur Radio Emergency Services
ARF	1) Action Request Form
	2) Aviation Route Forecast
ARFI	Areas Recommended For Improvement
ARG	Accident Response Group
ARI	Acute Respiratory Infection(s)
ARIP	Accidental Release Information Program
ARL	1) Activities Result List
	2) Airborne Reconnaissance Low
ARL-M	Airborne Reconnaissance Low - Multifunction
ARM	Aerial Radiological Monitor
ARNG	Army National Guard
ARNGOPS	Army National Guard Operations
A-ROC	Alternate Regional Operations Center
ARP	1) Administration and Resource Planning
	2) Alarm Resolution Protocols
ARPA	Advanced Research Projects Agency
ARPANET	Advanced Research Projects Agency Network
ARRAS	Automatic Residential Remote Alarm System
ARRL	American Radio Relay League
ARS	1) Agriculture Research Service
	2) Automatic Route Selection
ARSOF	Army Special Operations Forces
ARSR	Air Route Surveillance Radar
ART	Awards Review Team
ARTCC	Air Route Traffic Control Center
ARTS	Audit Report Tracking System
ARWO	Aerial Reconnaissance Weather Office
AS	Applicant Services
ASA	Average speed of answer
ASAC	Aviation Security Advisory Committee
ASA (IL & E)	Assistant Secretary of the Army (Installation, Logistics, and Environment)
ASAP	1) As Soon As Possible
	2) All-Hazards Situation Assessment Prototype
ASC	1) Advanced Systems Center
	2) Allowable Stack Concentration
	3) Application Support Center
	4) Area of Special Consideration
ASCADS	Automated Sorting, Conversion and Distribution System
ASCE	American Society of Civil Engineers
ASCII	American Standard Code for Information Interchange
ASCS	Agricultural Stabilization and Conservation Services
ASD	1) Allowable Stress Design
	2) Assistant Secretary of Defense
ASDAR	Aircraft-to-Satellite Data Relay
ASDSO	Association of State Dam Safety Officials
ASEAN	Association of Southeast Asian Nations
ASFPM	Association of State Floodplain Managers
ASH	1) America's Second Harvest
	2) Assistant Secretary for Health
ASIS	American Society for Industrial Security
ASL	1) Above Sea Level
	2) American Sign Language
ASLB	Atomic Safety and Licensing Board
ASM	Air Support Manager
ASME	American Society of Mechanical Engineers
ASMRO	Armed Services Medical Regulating Office
ASOS	Automated Surface Observing System
ASP	1) Active Server Page(s)
	2) Aviation Security Program
ASPE	American Society of Professional Estimators
ASPRS	American Society of Photogrammetry and Remote Sensing
ASR	Aquifer Storage Recovery
ASSE	American Society of Safety Engineers
ASSET	Advanced Simulation and Software Engineering Technology
ASST	Assistant
AST	Aboveground Storage Tank
ASTHO	Association of State and Territorial Health Offices
ASTI	Airport Security Technology Integration
ASTM	American Society for Testing and Materials
ASTS	Aeromedical Staging Squadron
ASU	All-Source Situational Understanding
ASUFAC	Airport and Seaport User Fee Advisory Committee, INS
AT	Antiterrorism
ATA	1) Actual Time of Arrival
	2) Airline Transportation Association
ATB	Applied Technology Board
ATC	1) Air Traffic Control
	2) Applied Technology Council
A-TCET	1) Anti-Terrorism Combat Enforcement Team
	2) AntiTerrorism Contraband Enforcement Team
ATCO	Airtanker Coordinator
ATCT	Air Traffic Control Tower
ATD	Actual Time of Departure
ATDP	Annual Training and Development Plan
ATDT	Atlantic Daylight Time  (GMT - 3)
ATF	(Bureau of) Alcohol, Tobacco, and Firearms
AT/FP	Antiterrorism & Force Protection
ATH	Air-Transportable Hospital
ATM	1) Automated Teller Machine
	2) Asynchronous Transfer Mode
ATMU	Advanced Technology Meteorological Unit
ATMWU	Air Transportable Mobile Weather Unit
ATO	Air Tasking Order
ATP	1) Air Transit Program
	2) Authority to Participate
ATR	Advanced Thermal Reactor
ATRAP	Air Transportable RADIAC Package
ATS	Automated Targeting System
ATSA	Aviation and Transportation Security Act
ATSDR	Agency for Toxic Substances and Disease Registry (USPHS)
ATST	Atlantic Standard Time  (GMT - 4)
ATTF	Anti-Terrorism Task Force
ATTN	Attention
ATV	All-Terrain Vehicle
ATWC	Alaska Tsunami Warning Center (obsolete; see WCATWC)
AUTODIN	Automatic Digital Network
AUTOVON	Automatic Voice Network (obsolete; see DSN)
AUVSI	Association for Unmanned Vehicle Systems International
AV	1) Air Vehicle
	2) Audio-Visual
AVC	Alaska Volcano Center
AVHRR	Advanced Very High Resolution Radiometer
AVIP	Anthrax Vaccine Immunization Program
AVLIS	Atomic Vapor Laser Isotope Separation
AVO	Alaska Volcano Observatory
AVOps	Aviation Operations
AVSEC	Aviation Security
AWD	Available Without Declaration
AWIPS	Advanced Weather Interactive Processing System
AWIS	Automated Weather Information System
AWO	American Waterway Operators
AWOL	Absent Without Leave
AWRA	American Water Resources Association
AWS	Alternate Work Schedule
AYE	Alternate Year Exercise
BAA	1) Broad Agency Announcement
	2) Broad Area Announcement
BACM	Business Alliance for Customs Modernization
BAER	Burned Area Emergency Rehabilitation (Team)
BALV	Best Available Lodging Value
BAND	Bio-agent Autonomous Networked Detectors
BAREPP	Bay Area Regional Earthquake Preparedness Project
BASIS	Biological Aerosol Sentry and Information System
BATF	Bureau of Alcohol, Tobacco, and Firearms
BBRS	Board of Building Regulations and Standards
BBS	Bulletin Board System
B/C	Benefit/Cost
BC	1) Base Camp
	2) Branch Chief
BCA	Benefit-Cost Analysis
BCC	Border Crossing Cards
BCF	Billion Cubic Feet
BCIS	Bureau for Citizenship and Immigration Services (see also CIS)
BCMC	Board for the Coordination of Model Codes
BCR	Benefit-Cost Ratio
BDA	Battle Damage Assessment
BDC	Bomb Data Center (FBI)
BDE	Brigade
BDO	Battle Dress Overgarment
BDRP	Biological Defense Research Program
BDS	Biohazard Detection System
BEEF	Big Explosive Experimental Facility
BEIR	Biological Effects of Ionizing Radiation
BENS	Business Executives for National Security
BENT SPEAR	Nuclear Incident (codeword)
BEP	Budget Execution Plan
BERD	Blocked Erosion Rate Database
BERT	Building Emergency Response Team
BFC	Bills For Collection
BFD	Base Flood Depth
BFE	Base Flood Elevation
BGAD	Blue Grass Army Depot
BGCA	Blue Grass Chemical Activity
BI	Background Investigation
BIA	1) Board of Immigration Appeals
	2) Bureau of Indian Affairs
BICE	Bureau of Immigration and Customs Enforcement
BIDS	Biological Integrated Detection System
BIFC	Boise Interagency Fire Center (obsolete, see NIFCC)
BIIDB	Badge Imaging Information Database
BIL	Band Interleaved by Line (Format)
BIT	1) Building Inventory Tool
	2) Built-In Test
BIWG	Bilateral Interdiction Working Group
BL	Bill of Lading
BLESTP	Basic Law Enforcement Supervisor Training Program
BLEVE	Boiling Liquid Expanding Vapor Explosion
BLM	Bureau of Land Management
BLS	Basic Life Support
BM	Bench Mark
BMC	Bomb Management Center
BMP	Best Management Practice(s)
BN	Battalion
B-NICE	Biological, Nuclear, Incendiary, Chemical, or Explosive
BOC	Basic Operating Cost
BOCA	Building Officials and Code Administrators
BOM	Bill of Materials
BoO	Base of Operations
BOR	Bureau of Reclamation
BORP	Building Occupancy Resumption Program
BOXER	Bulk-Only X-ray Enhanced Region
BPA	1) Blanket Purchasing Agreement
	2) Border Patrol Agent
BPAT	Building Performance Assessment Team
BPD	Blast-Protective Design
BPM	Basic Property Management
BPO	Blanket Purchase Order
BPR	Business Process Reengineering
BPRP	Bioterrorism Preparedness and Response Program
BPS	Bits Per Second
BPWG	Best Practices Working Group
BRM	1) Bioregulator/Modulator
	2) Business Reference Model
BROKEN ARROW	Nuclear Accident (codeword) 
BRT	Business Round Table
B&SA	Bureau and Statistical Agent (NFIP)
BSA	1) Base Support Area
	2) Business Software Alliance
BSC	Building Security Committee
BSE	Bovine Spongiform Encephalopathy (aka, "Mad Cow Disease")
BSI	1) Base Support Installation
	2) Border Safety Initiative
BSIR	Biannual Strategy Implementation Reports
BSPP	Broadcast Station Protection Program
BSSC	Building Seismic Safety Council
BST	Burn Specialty Team
BT	Buying Team
BTA	Bioterrorism Act
BTCP	1) Biological Terrorism Contingency Plan
	2) Biothreat Characterization Program
BTS	1) Budget Tracking System
	2) Border and Transportation Security
	3) Bureau of Transportation Statistics
BTU	British Thermal Unit
BU	Building (Line)
BTW	By the way
BW	Biological Warfare/Weapons
BWC	Biological Weapons Convention
BWIC	Biological Warning and Incident Characterization
BWR	Boiling Water Reactor
BY	Budget Year
BZPP	Buffer Zone Protection Plan
C2	Command and Control
C3	1) Command, Control, and Communications
	2) Customs Cybersmuggling Center
C4	Command, Control, Communications, and Computers
C4ISR	Command, Control, Communications and Computers, Intelligence, Surveillance and Reconnaissance
CA	1) Capability Assurance
	2) Chemical Agent
	3) Civil Affairs
	4) Congressional Affairs
	5) Cooperating Agency
	6) Cooperative Agreement
CAA	Clean Air Act
CAAP	Critical Asset Assurance Program
CABIN	Chemical and Biological Information Network
CAC	1) Citizens' Advisory Commissions
	2) Civil Applications Committee
	3) Climate Analysis Center 
	4) Community Assistance Contact
	5) Crisis Action Center
CACTIS	Computer-Assisted CSEPP Training Information System
CAD	1) Computer Aided/Assisted Dispatch
	2) Computer-Assisted Design
	3) Computer-Assisted Drafting
CADD	Computer-Assisted Drafting and Design
CADET	Computer-Assisted Design for Exercise Training
CADW	Civil Air Defense Warning
CAE	Command Assessment Element (for CBIRF)
CAER	Community Awareness and Emergency Response
CAG	Core Agency Group
CAI	1) Chemical Accident/Incident
	2) Computer-Aided Instruction
CAIC	Chemical Accident/Incident Control
CAICO	Chemical Accident/Incident Control Officer
CAIRA	Chemical Accident/Incident Response and Assistance
CALM	Cognitive and Affective Learning Model
CAM	1) Chemical Agent Monitor
	2) Computer-Aided Manufacturing
CAMDS	Chemical Agent Munition Disposal System
CAMEO	Computer-Aided Management of Emergency Operations
CAMEXPAN	Central America Mexico Panama
CAMS	Continuous Air Monitoring System
CANDU	Canadian-Deuterium Uranium (Reactor)
CAO	1) Caribbean Area Office
	2) Chief Administrative Officer
CAP	1) Capability Assessment Program
	2) Capability Assurance Program
	3) Civil Air Patrol
	4) Collection, Analysis and Planning
	5) Combat Air Patrol
	6) Community Action Program
	7) Community Assistance Program
	8) Corrective Action Program
CAPA	Coalition of Airline Pilot Association
CAPC	Civil Aviation Planning Committee
CAP-FASSE	Corrective Action Program - Federal Agency Support Services Element
CAPPS II	Computer Assisted Passenger Prescreening System (II equals 2nd generation)
CAPSS	Corrective Action Program Support System (obsolete)
CAP-SSSE	Corrective Action Program - State Support Services Element
CAR	1) Capability Assessment for Readiness 
	2) Congressional Affairs Representative
CARAT	Cooperation Afloat Readiness and Training
CARCAH	Chief, Aerial Reconnaissance Coordination -All Hurricanes
CARD	Collaborative Agencies for Responding to Disasters
CARDA	Continental Airborne Reconnaissance for Damage Assessment
CARL	Computerized Activities Results List
CART	1) Computer Analysis and Response Team
	2) County Animal Response Team
CAS	1) Chemical Abstract Service
	2) Crisis Action System
CASE	Computer-Aided Software Engineering
CASPER	C-130 Airborne Sensor with Palletized Electronic Reconnaissance
CASU	Centralized Administrative Services Unit
CAT	1) Catastrophic
	2) Category
	3) Collier Area Transit (Florida)
	4) Crisis Action Team
CATEGORY A	Debris Removal
PUBLIC ASSISTANCE	
CATEGORY B	Emergency Protective Measures
PUBLIC ASSISTANCE	
CATEGORY C	Roads and Bridges
PUBLIC ASSISTANCE	
CATEGORY D	Water Control Facilities
PUBLIC ASSISTANCE	
CATEGORY E	Buildings and Contents
PUBLIC ASSISTANCE	
CATEGORY F	Utilities
PUBLIC ASSISTANCE	
CATEGORY G	Parks, Recreational, and Other
PUBLIC ASSISTANCE	
CATEX	1) Catastrophic Exercise
	2) Categorical Exclusion
CATL	Chronology and Time Line
CATS	Consequences Assessment Tool Set
CATV	Cable Television
CAV	Community Assistance Visit(s)
CAX	Capability Assurance Exercise
CB	1) Chemical Biological
	2) Citizens' Band
	3) Cluster Bomb
CBA	1) Contractors and Builders Association
	2) Cost-Benefit Analysis
CBCF	Cross Border Crime Forum
CBD	Chemical and Biological Defense
CBDCOM	Chemical and Biological Defense Command (obsolete; see SBCCOM) 
CBEK	Compendium of Basic Exercise Knowledge
CBET	Computer Based Education and Training
CBI	1) Chandler Burning Index
	2) Computer-Based Instruction
CBIA	Coastal Barrier Improvement Act
CBIAC	Chemical and Biological Information Analysis Center
CBIRF	Chemical/Biological Incident Response Force (USMC)
CBL	1) Commercial Bill of Lading 
	2) Computer-Based Learning
CBN	1) Chemical, Biological, or Nuclear
	2) Cooperative Base Network
CBO	1) Congressional Budget Office
	2) Community Based Organization(s)
CBP	Customs and Border Protection, Bureau of  (also called BCBP)
CBPMO	[US] Customs and Border Protection Modernization Office
CBQRF	Chemical-Biological Quick Response Force
CBR	Chemical, Biological, and/or Radiological
CBRA	Coastal Barrier Resources Act of 1982 (also see COBRA)
CBRD	Chemical, Biological and Radiological Defense
CBRDT	Chemical/Biological Rapid Deployment Team
CBRN	Chemical, Biological, Radiological or Nuclear
CBRNE	Chemical, Biological, Radiological, Nuclear, or High-Yield Explosive
CBRNE-CM	Chemical, Biological, Radiological, Nuclear, or High-Yield Explosive - Consequence Management
CBRRT	Chemical & Biological Rapid Response Team
CBRS	1) Coastal Barrier Resources System
	2) Concept Based Requirement System
CBRT	Chemical-Biological Response Team
CBT	1) Chemical Biological Toxin 
	2) Computer-Based Training
CBW	Chemical and Biological Warfare
C&C	Components and Cladding
cc	cubic centimeter
CC	1) Citizen Corps
	2) Congregate Care
	3) Coordination Center
	4) Courtesy Copy
	5) Crisis Counseling
CCA	Comprehensive Cooperative Agreement (obsolete; see CA)
CCB	Configuration Control Board
CCC	1) Commodity Credit Corporation
	2) Congregate Care Center
	3) Crisis Coordination Center
CCF	Coded Cities Forecast
CCFP	(National Institute of Justice) Center for Civil Force Protection
CCG	Crisis Coordination Group
CCITP	Counterterrorism Cyber-crime Investigations Training Program
CCL	Contamination Control Line
CCN	Canonical Correlation Analysis
CCND	Consultative Committee on Natural Disasters
CCO	1) Claims Coordinating Office
	2) Consultation Coordination Officer
CCP	1) Casualty Collection Point
	2) Citizen Corps Program (Department of Homeland Security grass-roots program involving citizens; based in OSLGC&P)
	3) Crisis Counseling Program
CCR	Central Contractor Registration (www.ccr.gov)
CCRA	Canada Customs and Revenue Agency
CCSL	Command and Control Simulation Lab
CCST	Chemical Casualty Site Team
CCT	Communications Coordination Team
CCTV	Closed-Circuit Television
CD	1) Civil Defense
	2) Compact Disc
CDBG	Community Development Block Grant
CDC	Centers for Disease Control and Prevention
CDCP	Center for Disease Control and Prevention
CDD	1) Capability Development and Demonstration
	2) Cross-Disaster Database
CDE	Committed Dose Equivalent
CDERA	Caribbean Disaster Emergency Response Agency
CDEX	Civil Defense Exercise
CDL	1) Commercial Driver's License
	2) Community Disaster Loan
CDMA	Code Division Multiple Access
CDO	Central Dense Overcast
CDP	Center for Domestic Preparedness
CDR	1) Christian Disaster Response
	2) Commander
	3) Critical Design Review
	4) Crude Death Rate
CDRDB	Conventional Disaster Resource Database
CDRG	Catastrophic Disaster Response Group
CDRG-PAC	Catastrophic Disaster Response Group - Primary Agency Committee
CD-ROM	Compact Disc - Read-Only Memory
CDRS	Call Detail Reporting System
CDT	Central Daylight Time  (GMT - 5)
CDX	Control and Direction Exercise
C/E	Communications/Electronics
CE	1) Categorical Exclusion
	2) Civil Engineer
CEA	Council of Economic Advisors
CEB	Contractor Evaluation Board
CEC	Chief Exercise Controller
CED	Committee for Economic Development
CEDE	Committed Effective Dose Equivalent
CEE	Consolidated Enforcement Environment
CEF	1) Cost, Insurance, and Freight
	2) Critical Emergency File
CEI	Critical Elements of Information
CEM	1) Certified Emergency Manager
	2) Comprehensive Emergency Management
CEMA	Consumer Electronics Manufacturers Association
CEMD	County Emergency Management Director
CEMIS	Crisis and Emergency Management Information System
CEMO	Canada Emergency Measures Organization
CEMP	Comprehensive Emergency Management Plan
CEMS	Continuous Emission Monitoring System
CENL	Chemical Event Notification Level
CENR	Committee on Environment and Natural Resources
CENTPAC	Central Pacific
CEO	Chief Executive Officer
CEOC	County Emergency Operations Center
CEOS	Committee on Earth-Orbiting Satellites
CEP	1) Circular Error Probable
	2) Civil Emergency Planning (NATO)
	3) Civil Emergency Preparedness
CEPA	Canadian Emergency Preparedness Association
CEPAP	Cost Estimating for the Public Assistance Program, Expert Panel on
CEPPO	Chemical Emergency Preparedness and Prevention Office
CEQ	Council on Environmental Quality
CERC	Coastal Engineering Research Center
CERCLA	Comprehensive Environmental Response, Compensation, and Liability Act (aka "Superfund")
CERES	California Environmental Resources Evaluation System
CERT	1) Community Emergency Response Team
	2) Computer Emergency Readiness Team
	3) Computer Emergency Recovery Team
	4) Computer Evidence Response Training
CERT/CC	Computer Emergency Response Team/Coordination Center
CEST	Cyber Emergency Support Team
CET	Contraband Enforcement Team
CEU	Compliance Enforcement Unit
CEXS	Cooperative Extension Service
CFA	1) Cognizant Federal Agency
	2) Computerized Fleet Analysis
CFAO	Cognizant Federal Agency Official
CFC	1) Chlorofluorocarbon
	2) Combined Federal Campaign
CFDA	Catalog of Federal Domestic Assistance
CFGDP	Crash Feed Grain Donation Program
CFIUS	Committee for Foreign Investment in the United States
CFIVSAC	Commercial Fishing Industry Vessel Safety Advisory Committee
cfm	cubic feet per minute
CFO	1) Chief Financial Officer
	2) Chief of Field Operations
CFR	Code of Federal Regulations
CFS	1) Certified Fraud Specialists, Association of
	2) Cubic Feet per Second
CFSA	Consolidated Farm Service Agency
CFSI	Congressional Fire Services Institute
CFTC	Commodity Futures Trading Commission
CG	1) Coast Guard
	2) Commanding General
CGD	Coast Guard District
CGEOC	Canadian Government Emergency Operations Center
CGFAA	Cerro Grande Fire Assistance Act
CGISS	Center for Geophysical Investigation of the Shallow Subsurface
CGM	Computer Graphics Metafile
CGS	Council of Graduate Schools
CHARM	Complex Hazardous Release Model
CHAWS	Chemical Hazard Warning System
CHCO	Chief Human Capital Officer
ChE	Cholinesterase
CHECK 21	Check Clearing for the 21st Century Act
CHEMTREC	Chemical Transportation Emergency Center
CHER-CAP	Community Hazards Emergency Response - Capability Assurance Process 
CHG	Change
CHIP	Capability and Hazard Identification Program
CHRIS	Chemical Hazard Response Information System
CI	Critical Infrastructure
CIA	Central Intelligence Agency
CIAD	Congressional and Intergovernmental Affairs Division
CIAETP	Criminal Investigation in Automated Equipment Training Program
CIAO	Critical Infrastructure Assurance Office/Officer
CIBADS	Canadian Integrated Biochemical Agent Detection System
CICAD	Center for Intelligence Collection Analysis and Dissemination  
CICG	Critical Infrastructure Coordination Group
CID	Criminal Investigation Division or Department, Community Identification
CIDA	Canadian International Development Agency
CIDCON	Civil Defense Condition
CIDER	Computer Interactive Display, Entry, and Retrieval
CIF	1) Central Information File
	2) Cost, Insurance, and Freight
CIFFC	Canadian Interagency Forest Fire Centre
CII	Critical Infrastructure Information
CIIA	Critical Infrastructure Information Act of 2002
CI/KR	Critical Infrastructure/Key Resources
CIMA	Channel Industry Mutual Aid
CIMRT	Critical Incident Management Response Team
CIMS	1) Correspondence and Issues Management System
	2) Critical Incident Management Support
CIMST	Critical Incident Management Support Team
CINC	Commander-In-Chief
CINCAMC	Commander-in-Chief, Air Mobility Command
CINCLANT	Commander-in-Chief, Atlantic Fleet
CINCNORAD	Commander-in-Chief, North American Aerospace Defense Command
CINCPAC	Commander-in-Chief, Pacific Command
CINCSOC	Commander-inChief, Special Operations Command
CINCTRANS	Commander-in-Chief, Transportation Command
CIND	Compact Integrated Narcotics Detector
CINDI	1) Center for Integration of Natural Disaster Information
	2) Compact Integrated Narcotics Detector Instrument
CIO	Chief Information Office/Officer
CIP	Critical Infrastructure Protection
CIPB	Critical Infrastructure Protection Board
CIPIC	Critical Infrastructure Protection Information Center
CIPWG	Critical Infrastructure Protection Working Group
CIRG	Critical Incident Response Group
CIRP	Catastrophic Incident Response Plan
CIS	1) Central Index System
	2) Citizenship and Immigration Services, Bureau of  (see also BCIS)
	3) Civil Infrastructure Security
	4) Community Information System
CISD	Critical Incident Stress Debriefing
CISM	Critical Incident Stress Management
CITAC	Computer Intrusion Threat Assessment Center
CITO	Central Imagery Tasking Office
CJCS	Chairman of the Joint Chiefs of Staff
CJIS	Criminal Justice Information System
CJTF	Commander, Joint Task Force
CLIVAR	Climate Variability
CLO	Congressional Liaison Officer
CLOMA	Conditional Letter of Map Amendment
CLOMR	Conditional Letter of Map Revision
CLS	Central Locator System
CM	1) Cadre Manager
	2) Chief of Mission
	3) Configuration Management
	4) Countermeasure
CMA	1) Chemical Manufacturers Association
	2)  Chemical Materials Agenc
	3)yCommunity Map Action (Form)
CMAA	Customs Mutual Assistance Agreement (affiliated with BTS/CBP)
CMAS	Circular Map Accuracy Standard
CMAT	Consequence Management Advisory Team
CMC	1) Center for Marine Conservation
	2) Crisis Management Center
	3) Crisis Management Coordinator
	4) Customs Management Centers
CMCAC	Crisis Management Center Augmentation Cadre
CME	Chief Medical Examiner
CMF	Case Management File
CMG	Consequence Management Group
CMHS	Center for Mental Health Services
CML	Commercial
CMO	Civil Military Operations
CMOC	Civil Military Operations Center
CMT	Crisis Management Team
CMTB	Countermeasures Test Bed
CMU	1) Concrete Masonry Unit
	2) Crisis Management Unit
CMV	Commercial Motor Vehicle
CMX	Crisis Management Exercise
CNC	1) Central Network Control
	2) Computer Numerical Control
CNMI	Commonwealth of the Northern Mariana Islands
CNN	Cable News Network
CNO	1) Chief of Naval Operations
	2) Counternarcotics Office/Officer
CNR	Center for National Response, The
CNS	1) Central Nervous System
	2) Corporation for National Security
	3) Corporation for National Service
CNSC	Canadian Nuclear Safety Commission
CNSIP	Classified National Security Information Program
CNSNS	Commission for Nuclear Safety and Safeguards
CNT	Counternarcoterrorism
CNU	Crisis Negotiations Unit (FBI)
CNWDI	Critical Nuclear Weapons Design Information
CO	1) Commanding Officer
	2) Communications Officer
	3) Contracting Officer
	4) Custodial Officer
COA	Course of Action
COAC	Customs Operations Advisory Committee
COAD	Community Organizations Active In Disaster
COAP	Center for Ocean Analysis and Prediction
COB	Close of Business
COBOL	Common Business-Oriented Language
COBRA	Coastal Barriers Resources Act
COBRE	Carry-On Bag Remote Examination
COC	1) Combat Operations Center
	2) Country of Citizenship
COCOM	Coordinating Committee
COD	Cash On Delivery
CODEL	Congressional Delegation
COE	[US Army] Corps of Engineers
COG	1) Continuity of Government
	2) Council of Governments
COGO	Coordinate Geometry
COI	Critical Operational Issue
COL	1) Colonel
	2) Cost of Living
COLA	Cost-of-Living Allowance
COLISEUM	Community On-Line Intelligence System for End Users and Managers
COLT	Cellular-on-Light-Truck
COMC	Communications Coordinator
COMCDTF	Commander, Civil Disturbance Task Force
COMINT	Communications Intelligence
COMM	Communications
COMPUSEC	Computer Security
COMREL	Community Relations
COMSEC	Communications Security
CONOPS	Concept of Operations
CONPLAN	1) Concept of Operations Plan
	2) Contingency Plan
	3) U.S. Government Interagency Domestic Terrorism Concept of Operations Plan (see NRP)
CONUS	Continental (or Contiguous) United States
CONUSA	Continental United States Army
COO	Chief Operating Officer
COOP	Continuity of Operations
COP	1) Common Operating Picture
	2) Chief of Party
	3) Chief of Police
COPS	Community Oriented Policing Service
COR	Contracting Officers Representative
CORE	1) Cadre of Response Employees
	2) Cadre of On-call Response Employees
	3) Citizens of Oakland Respond to Emergencies
CORS	Continuously Operating Reference Station(s)
COS	1) Cash on Shipment
	2) Chief of Staff
COSIN	Control Staff Instruction(s)
COSO	Chief of Staff Office/Operations
COTHEN	Customs Over-The-Horizon Enforcement Network
COTP	Captain of the Port
COTR	Contracting Officer's Technical Representative
COTS	Commercial Off-The-Shelf
COUSCS	Commercial Operations of the US Customs Service, Advisory Committee on
COW	Cellular-On-Wheels
CP	1) Command Post
	2) Control Point
	3) Coordination and Planning
CPA	Coalition Provisional Authority
CPAS	Cellular Priority Access System
CPAV	Community Program Assistance Visit
CPC	Climate Prediction Center
CPD	Community Planning and Development
CPE	Contingency Planning Exchange
CPG	Civil Preparedness Guide
CPHC	Central Pacific Hurricane Center
CPI	Consumer Price Index
cpm	counts per minute
CPO	1) Central Processing Office
	2) Chief Procurement Officer
CPOT	Consolidated Priority Organization Target
CPPA	Certified Professional Property Administrator
CPPM	Certified Professional Property Manager
CPPS	Certified Professional Property Specialist
CPR	Cardiopulmonary Resuscitation
CPRM	Checkpoint Resource Management
CPS	Certified Public Secretary
CPSC	Consumer Product Safety Commission
CPSP	Comprehensive Passenger Screening Profile
CPTED	Crime Prevention Through Environmental Design
CPU	Central Processing Unit
CPX	Command Post Exercise
CR	1) Claims Representative
	2) Community Relations
	3) Congressional Relations
	4) County Road
CRAF	Civil Reserve Air Fleet
CRAMP	Coral Reef Assessment and Monitoring Program
CRC	1) Contamination Reduction Corridor
	2) Crisis Response Cell
CRCL	Civil Rights and Civil Liberties
CRCPD	Conference of Radiation Control Program Directors
CRDC	Cybersecurity Research & Development Center
CREST	Contingency Real Estate Support Team
CREW	Cascadia Region Earthquake Workgroup
CRI	Cities Readiness Initiative
CRM	Crisis (or Communications) Resource Manager
CRO	1) Congressional Relations Officer
	2) Community Reuse Organization
CROP	Common Relevant Operational Picture
CRP	1) Conservation Reserve Program
	2) Critical Review Phase
CRREL	(US Army) Cold Region Research and Engineering Laboratory
CRS	1) Catholic Relief Services
	2) Community Rating System
	3) Community Relations Service
	4) Congressional Research Service
CRT	Cathode Ray Tube
CRTF	Commander, Response Task Force
CRUD	Create, Retrieve, Update, Delete
CRWG	Crisis Response Working Group
CRWRC	Christian Reformed World Relief Committee
CRYSYS	Cryospheric System
CRZ	Contamination Reduction Zone
CS	1) Chief of Staff 
	2) Chief Scientist [NOAA] 
CSA	1) Chief of Staff, Army
	2) Community Services Administration
CSAF	Chief of Staff, Air Force
CSBG	Community Services Block Grant
CSDGM	Content Standard for Digital Geospatial Metadata
CSDP	Chemical Stockpile Disposal Program
CSEM	Center for the Study of Emergency Management
CSEPP	Chemical Stockpile Emergency Preparedness Program
CSG	1) Council of State Governments
	2) Counterterrorism Security Group
CSH	Combat Support Hospital
CSHIB	Chemical Safety and Hazards Investigation Board
CSI	1) Container Security Initiative
	2) Customer Satisfaction Index
CSIL	Commercial Satellite Imagery Library
CSIRT	Computer Security Incident Response Team
CSIS	1) Canadian Security Intelligence Service
	2) Center for Strategic International Studies
	3) Credited Structures Inventory System
CSM	Chemical Surety Material
CSMIP	California Strong-Motion Instrumentation Program
CSO	1) Chief Security Officer
	2) Component Security Officer
CSPI	Critical Systems Protection Initiative
CSREES	Cooperative State Research Education and Extension Service
CST	1) Central Standard Time (GMT-6)
	2) Civil Support Team (National Guard--for WMD)
CSTARC	Cyber Security Tracking, Analysis, & Response Center
CSTE	Council of State and Territorial Epidemiologists
CSU	1) Clearing-Staging Unit
	2) Crime Scene Unit
	3) Customer Satisfaction Unit
CT	Counterterrorism  
CTA	Combined Travel Authorization
CTAC	Chemical Transportation Advisory Committee
CTBT	Comprehensive Nuclear Test Ban Treaty
CTC	1) Conference and Training Center
	2) Counter-Terrorism Center
CTD	1) Concept and Technology Development
	2) Counterterrorist Division
	3) Cumulative Trauma Disorder
CTF	Combined Task Force
CTIA	Cellular Telecommunications & Internet Association
CTJTF	Counter-Terrorism Joint Task Force
CTOC	Containerized Tactical Operations Center
CTOEM	Connecticut Office of Emergency Management
CTOTF	Counter-Terrorism Operations Training Facility
CTP	Cooperating Technical Partners (Initiative)
C-TPAT	Customs-Trade Partnership Against Terrorism
CTS	Cooperating Technical State
CTUIR	Confederated Tribes of the Umatilla Indian Reservation
Cu	Cubic
CUREE	Consortium of Universities for Research in Earthquake Engineering
CUSEC	Central United States Earthquake Consortium
CUSP	Central United States Partnership
CV	Combined Verification
CVE	Common Vulnerabilities and Exposures
CVO	Cascades Volcano Observatory
CVP	Citizenship Verification Procedures
CVS	Combined Verification Section
CW	1) Chemical Warfare/Weapons
	2) Continuous Wave
CWA	1) Chemical Warfare Agent
	2) Clean Water Act
CWC	Chemical Weapons Convention
CWIN	Cyberspace Warning Intelligence Network
CWN	Call When Needed
CWS	1) Check Writing System
	2) Church World Service
CWU	Church World United
CY	1) Calendar Year
	2) Cubic Yard
CZM	Coastal Zone Management
CZMA	Coastal Zone Management Act
D2PC	An Army computer dispersion modeling capability
D2Puff	An Army computer dispersion modeling capability that can factor in terrain and wind changes
D/A	Departments and Agencies
DA	1) Damage Assessment
	2) Declaration of Applicant
	3) Department of the Army
	4) District Attorney
DAAMS	Depot Area Air Monitoring System
DAAC	Distributed Active Archive Center
DAC	1) Disaster Application/Assistance Center
	2) Direct Air Carrier
DACS	Deportable Alien Control System (replaced by ERM)
DAD	Deputy Assistant Director
DAE	Disaster Assistance Employee(s) [aka SAE]
DAEO	Designated Agency Ethics Officer
DALIS	Disaster Assistance Logistics Information System
DALO	Disaster Area Liaison Officer
DAMAGES	Disaster Accountability Management System
DAP	Disaster Assistance Program(s)
DA PAM	Department of the Army Pamphlet
DAR	Designated Agency Representative
DARCOM	Development And Readiness Command
DARIS	Disaster Automated Reporting and Information System
DARO	Defense Airborne Reconnaissance Office
DARPA	Defense Advanced Research Project(s) Agency
DART	1) Daily Advisories/Risk and Threat
	2) Damage Assessment Reconnaissance Team
	3) Disaster Assessment and Recovery (or Response) Team
	4) Disaster Assistance Response Team
DASC	Disaster Assistance Support Center
DASH	Deputy Assistant Secretary for Health
DASHO	Designated Agency Safety and Health Official
DASP	Disaster Assistance Support Program
DAST	Disaster Assessment Survey Team
DAT	Digital Audio Tape
DAWG	Disaster Attache Working Group
DAWIA	Defense Acquisition Workforce Improvement Act
DBA	1) Database Administrator
	2) Design Basis Accident
DBMS	Database Management System
DC	1) Direct Current
	2) Dislocated Civilians
	3) District of Columbia
DCA	1) Defense Ammunition Center
	2) Defense Communications Agency
	3) Disaster Communication Agreement
DCAA	Defense Contract Audit Agency
DCAC	Demilitarization Chemical Agent Concentrator
DCAS	Document Control and Accountability System
DCC	1) Document Control Center
	2) Donation Coordination Center
DCCC	Defense Collection Coordination Center
DCD	Deseret Chemical Depot
DCE	1) Defense Coordinating Element
	2) Disaster Communications Equipment
DCEMA	District of Columbia Emergency Management Agency
DCE/MED TF	Disaster Coordinating Element/ Medical Task Force
DCI	Director, Central Intelligence
DCIS	Defense Criminal Investigation Service
DCLO	Deputy Congressional Liaison Officer
DCM	Deputy Chief of Mission
DCN	Disaster Contractors Network
DCO	Defense Coordinating Officer
DCP	Development Concept Plan
DCPS	Digital Cartographic Production System
DCS	1) Defense Communications System
	2) Deputy Chief of Staff
	3) Digital Control System
DCT	Donations Coordination Team
DCWDB	Direction, Control, and Warning Database
DCX	Direction and Control Exercise
DD	1) Damaged Dwelling
	2) Direct Dial
DDD	Direct Distance Dialing
DDE	Dynamic Data Exchange
DDOS	Distributed Denial of Service
DDP	Data-Derived Product
DDRM	Deputy Disaster Recovery Manager
DEA	1) Data Exchange Agreement
	2) Drug Enforcement Administration
DEC	1) DCI Environmental Center
	2) Director's Executive Council
	3) Disasters Emergency Committee
DECD	Department of Economic and Community Development
DECON	Decontamination
DED	Department of Education
DEFCON	Defense Condition
DELO	Deputy Environmental Liaison Officer
DEM	1) Department of Environmental Management
	2) Digital Elevation Model
	3) Division of Emergency Management
DEMOB	Demobilization or Demobilize
DEO	Detention Enforcement Officer
DEP	1) Department of Environmental Protection
	2) Domestic Emergency Preparedness
DEPER	Deployed Personnel Report
DEPS	Domestic Emergency Planning System
DEPSEC	Deputy Secretary
DEPSECDEF	Deputy Secretary of Defense
DERC	Damage Estimates, Ranges and Casualties
DERF	Defense Emergency Response Fund
DERIS	Domestic Emergency Response Information Services
DES	1) Data Encryption Standard
	2) Disaster Emergency Services
	3) Division of Emergency Services
DESCOM	Depot System Command
DEST	Domestic Emergency Support Team(s)
DEW	Distant Early Warning
DFA	Direct Federal Assistance
DFAIT	Department of Foreign Affairs and International Trade
DFAS	Defense Financial Accounting Service
DFC	Disaster Finance Center
DFCO	Deputy Federal Coordinating Officer
DFIRM	Digital Flood Insurance Rate Map
DFO	Disaster Field Office
DFOM	Disaster Field Operations Management
DFRN	Disaster Federal Register Notice
DFSG	Disaster Financial Services Group
DFSR	Disaster Financial Status Report
DFTO	Disaster Field Training Office (or Organization)
DGCO	Deputy Grant Coordinating Officer
DG/CS	Dangerous Goods/Cargo Security
DGN	Design (File)
DGPS	Differential Global Positioning System
DH	Disaster Housing
DHA	Disaster Housing Assistance
DHC	Disaster Housing Checkwriter
DHCD	Department of Housing and Community Development
DHelp	Disaster Help Web Site
DHF	Dengue Haemorrhagic Fever
DHHS	Department of Health and Human Services
DHO	Disaster Housing Officer
DHP	Disaster Housing Program
DHS	Department of Homeland Security [ESF-13]
DHUD	Department of Housing and Urban Development (also HUD)
DIA	Defense Intelligence Agency
DIAO	Deputy Individual Assistance Officer
DID	Direct Inward Dial
DIDA	Detection, Identification, and Assessment
DIFAX	Digital Facsimile
DIHS	Division of Immigration Health Services
DII	Defense Information Infrastructure
DIL	Derived Intervention Level
DIMOS	Drug Intelligence Method of Operation System
DIR	1) Director
	2) Domestic Imagery Requirement
DIRC	Disaster Information Resource Center
DIRNSA	Director, National Security Agency
DIS	Defense Investigative Service
DISA	Defense Information Systems Agency
DISC	Disaster Information Systems Clearinghouse
DISCO	Defense Industrial Security Clearance Office(r)
DISN	Defense Information System Network
DISUM	1) Daily Intelligence Summary
	2) Disaster Summary
DLA	Defense Logistics Agency
DLG	Digital Line Graph
DLG-3	Digital Line Graph Level 3
DLL	Dynamic-Link Library(ies)
DLS	Disaster Legal Services
DM	Disaster Management
DMA	1) Defense Mapping Agency
	2) Designated Market Area
	3) Disaster Mitigation Act
DMAC	Disaster Management Advisory Committee
DMAT	Disaster Medical Assistance Team
DMA2K	Disaster Mitigation Act of 2000 (also called DMA 2000 or DMA)
DMH	Disaster Mental Health
DMHT	Disaster Mental Health Team
DMI	Disaster Management Interoperability
DMIATF	Data Management Improvement Act Task Force, INS
DMI-Services	Disaster Management Interoperability Services
DMIS	Disaster Management Information System
DMORT	Disaster Mortuary Operational Response Team
DMRIS	Defense Medical Regulating Information System
DMRS	Data Management and Retrieval System
DMS	Dispatch Messaging System
DMSS	Defense Medical Surveillance System
DMV	Department of Motor Vehicles
DNA	1) Defense Nuclear Agency
	2) deoxyribonucleic acid
DNAT	Defense Nuclear Advisory Team
DNF	Did Not Finish
DNR	Department of Natural Resources
DNS	1) Department of Nuclear Safety
	2) Domain Name Server
DO	1) Digital Orthophoto
	2) Director of Operations
DOA	Dead On Arrival
DOB	1) Date of Birth
	2) Duplication of Benefits
DOC	1) Department of Commerce
	2) Department of Conservation
	3) Department of Corrections
	4) Department Operations Center
	5) Discrete Organic Chemicals
DOD or DoD	Department of Defense
DODD	Department of Defense Directive
DODESB	Department of Defense Explosive Safety Board
DODRDB	DoD Resources Data Base
DOE	Department of Energy [ESF-12]
DOEd	Department of Education
DOH	Department of Health
DOI	Department of the Interior
DOIM	Director of Information Management
DOJ	Department of Justice [ESF-13]
DOL	Department of Labor
DOLP	Disaster Operations Leadership Program
DOM	Disaster Operations Manual
DOMS	Director of Military Support
DON	Donation(s)
DONAT	Donation(s)
DOQ	Digital Orthophoto Quadrangle
DOS	1) Department of State
	2) Disk Operating System
DOT	Department of Transportation
DP	Disaster Preparedness
DPA	1) Deepwater Ports Act
	2) Defense Production Act
	3) Delegation of Procurement Authority
DPAO	1) Deputy Public Affairs Officer
	2) Deputy Public Assistance Officer
DPAS	Defense Priorities and Allocations System
DPC	Domestic Policy Council
DPIG	Disaster Preparedness Improvement Grant
DPM	Disintegrations Per Minute
DPMU	Disaster/Deployable Portable Morgue Unit
DPMT	Disaster Pediatric Medical Team
DPOD	Disaster Personnel Operations Division
DPP	1) Disaster Processing Procedures
	2) Domestic Preparedness Program
DPPC	Data Protection and Privacy Commissioners
DPRE	Displaced Persons, Refugees and Evacuees
DPS	Department of Public Safety
DPW	Department of Public Works
DR	1) Disaster Declaration Number (alphabetic designation or precursor for)
	2) Disaster Recovery
	3) Disaster Response
DRASH	Deployable Rapid-Assembly Shelter
DRAT	District Response Advisory Team
DRC	Disaster Recovery Center
DRD	1) Deputy Regional Director
	2) Direct-Reading Dosimeter
DRES	Disaster Response Evaluation System
DRF	1) Disaster Relief Fund
	2) Disaster Response Force
DRG	1) Digital Raster Graphic
	2) District Response Group
DRL	Derived Response Levels
DRM	Disaster Recovery Manager
DRO	Detention and Removal Office
DRSS	Division of Radiation Safety and Safeguards
DRT	Disaster Response Team (NIMA)
DRTF	Disaster Relief Task Force
DRU	1) Direct Reporting Unit
	2) Disaster Resistant Universities
	3) Disaster Response Unit
DSB	Defense Science Board
DSBCC	Detection Systems for Biological & Chemical Countermeasures
DSC	Digital Selective Calling
DSCA	Defense Support to Civil Authority 
DSCO	Deputy State Coordinating Officer
DSCS	Defense Satellite Communications System
DSEA	Domestic Security Enhancement Act of 2003
DSEC	Deputy Secretary
DSFO	Deputy Senior FEMA Official
DSN	Defense Switched Network
DSO	1) Director of Site Operations
	2) Disaster Safety Officer
DSP	Disaster Support Package
DSR	Damage Survey Report
DSWA	Defense Special Weapons Agency
DTAPPS	Disposable Toxicological Agent Personal Protection System
DT&E	Development Test and Evaluation
DTE	Disaster Temporary Employee(s)
DTED	Digital Terrain Elevation Data
DTG	Date-Time Group
DTIC	Defense Technical Information Center
DTM	Digital Terrain Model
DTMS	Disaster Transportation Management System
DTO	Drug Trafficking Organization
DTOS	Deployable Tactical Operations System
DTRA	Defense Threat Reduction Agency
DTRG	Defense (or DoD) Technical Response Group
DTRIM	Domestic Threat Reduction and Incident Management
DTS	Diplomatic Telecommunications Service
DTSA	Defense Technical Security Agency
DU	Dobson Unit
DUA	Disaster Unemployment Assistance
DULL SWORD	Nuclear safety deficiency
DUNS	Data Universal Numbering System
DUS	Deputy Under Secretary
DUST OFF	Medical Evacuation via Helicopter (slang)
DV	Distinguished Visitor
DVA	Department of Veterans Affairs
DW	Data Window
DWG	Drawing (file)
DWI	1) Disaster Welfare Information (or Inquiry)
	2) Driving While Intoxicated
DWR	Department of Water Resources
DWT	Dead Weight
E 911	Enhanced 9-1-1
EA	1) Eastern Area
	2) Emergency Action(s)
	3) Energy Assurance 
	4) Enterprise Architecture
	5) Environmental Assessment
	6) External Affairs
EAB	1) Enterprise Architecture Board
	2) Exclusion Area Boundary
EACC	Eastern Area Coordination Center
EACG	Eastern Area Coordinating Group
EACT	Emergency Action and Coordination Team
EAD	1) Employment Authorization Document
	2) Executive Associate Director
EADRCC	Euro-Atlantic Disaster Response Coordination Center
EAL	Emergency Action Level
EAM	Emergency Action Message
EAO	1) Emergency Action Officer
	2) Energy Assurance Office (see also EA)
EAP	1) Emergency Action Plan
	2) Emergency Action Procedures
	3) Employee Assistance Program
EAR	Emergency Alert Radio
EARN	Employer Assistance Referral Network
EART	Evening Advisory Risk Threat
EAS	Emergency Alert System (replaced EBS in 1997)
EBR	Endogenous Biological Regulators
EBS	Emergency Broadcast System (obsolete, see EAS)
EBT	Electronic Benefits Transfer
EBW	Exploding (or Electronic) Bridge Wire
EC	1) Elevation Certificate
	2) Emergency Coordinator
	3) Extraordinary Circumstances
ECA	Earth-orbit Crossing Asteroid
ECAPS	Enterprise Coordination & Approval Processing System
ECC	Emergency Communications Center
ECCS	Emergency Core Cooling System
ECCV	Emergency Command and Control Vehicle
ECD	1) Effective Cumulative Dose
	2) Emergency Contacts Directory
	3) Estimated Completion Date
ECFG	Emergency Coordination Functional Group
ECG	1) Emergency Coordination Group
	2) Exercise Control Group
ECI	Export-Controlled Information
ECL	Emergency Classification Level
ECP	Emergency Conservation Program
ECS	1) Electronic Certification System
	2) Emergency Communications Staff
	3) Emergency Coordinating Staff
ECSAP	Electronic Crimes Special Agent Program
ECT	1) Emergency Coordinating Team
	2) Exercise Control Team
ECTF	Electronic Crimes Task Force
ECWAG	Emergency Community Water Assistance Grant
ED	1) [Department of] Education
	2) Effective Dose
EDA	Economic Development Administration
EDAC	Economic Defense Advisory Committee
EDC	1) EROS Data Center
	2) Energy Disruption Committee
EDD	Explosive Detection Device
EDE	Effective Dose Equivalent
EDI	Electronic Data Interchange
EDIS	Emergency Disaster Information System
EDR	1) Economic Development Representative
	2) External Data Request
EDS	Explosive Detection System(s)
EDT	Eastern Daylight Time (GMT - 4)
EEE	1) Eastern Equine Encephalitis
	2) Essential Evaluation Elements
EEGL	Emergency Exposure Guidance Level
EEI	Essential Elements of Information
EEM	Exercise Evaluation Methodology
EENET	Emergency Education Network (at NETC)
EEO	Equal Employment Opportunity
EEOC	Equal Employment Opportunity Commission
EER	Eligible Existing Resources
EERI	Earthquake Engineering Research Institute
EET	Emergency Evacuation Team
EEX	Employee Express
EEZ	Exclusive Economic Zone
EFAP	Emergency Feed Assistance Program
EFO	Emergency Field Office
EFP	Emergency Feed Program
EFS	Emergency Food and Shelter
EFSNB	Emergency Food and Shelter National Board
EFSP	Emergency Food and Shelter Program
EFT	Electronic Funds Transfer
E-Gov	E-Gov is the use by the government of web-based Internet applications and other information technologies, combined with processes that implement these technologies.  This term is also used to refer to the E-Gov agenda item in the President's Management Agenda (PMA), Presidential Priority E-Gov initiatives, and the E-Gov focus areas referenced in the FY 2004 President's Budget.
EHM	Earthquake Hazard Mitigation
EHP	Environmental/Historic Preservation
EHS	Extremely Hazardous Substance
EIA	Electronic Industries Alliance
EICC	Emergency Information and Coordination Center
EIDA	Executive Information and Display Area
EIDL	Economic Injury Disaster Loan
EIIP	Emergency Information Infrastructure Partnership
EIMA	Emergency Information and Media Affairs
EIO	Emergency Information Officer
EIPA	Emergency Information and Public Affairs
EIPT	Exercise Integrated Process Team
EIRS	Emergency Information Retrieval System
EIS	1) Emergency Information System
	2) Environmental Impact Statement
	3) Epidemiological Intelligence Service
EIT	Electronic and Information Technology
EJ	Environmental Justice
ELC	Engineering Logistics Center
ELINT	Electronic Intelligence
ELO	Environmental Liaison Officer
ELR	Employee Labor Relations
ELT	1) Emergency Location Transmitter
	2) Evacuation Liaison Team
EM	1) Emergency Management (or Manager)
	2) Exercise Manual
EMA	Emergency Management Agency
EMAC	Emergency Management Assistance Compact
E-mail	Electronic Mail
EMAS	Emergency Management Assessment System
EMD	1) Electronic Monitoring Device
	2) Emergency Management Director
	3) Emergency Management Division
EMERCOM	Emergency Command
EMERGCON	Emergency Condition
eMerge2	electronically Managing enterprise resources for government effectiveness and efficiency
EMERS	Emergency Management Exercise Reporting System
EMI	1) Emergency Management Institute
	2) Emergency Management Institute, Board of Visitors for the
	3) Electromagnetic Interference
EMIS	Emergency Management Information System
EML	Environmental Measurements Laboratory
EMNPP	Emergency Management and National Preparedness Program
EMOC	Emergency Management Operations Center (or Course)
EMP	Electromagnetic Pulse
EMPA	Emergency Management Planning and Assistance
EMPG	Emergency Management Performance Grants
EMPO	Emergency Medical Preparedness Office
EMPS	Emergency Management Program Specialist
EMPTY QUIVER	Theft, seizure, or loss of a nuclear weapon or component
EMR	1) Electromagnetic Radiation
	2) Emergency Minimal Repair
	3) Environmental Management Review
EMRT	Emergency Medical Response Team
EMS	1) Emergency Management Specialist
	2) Emergency Medical System [or Service(s)]
EMSHG	Emergency Management Strategic Healthcare Group
EMSSA	Emergency Medical Services System Act
EMT	1) Emergency Management Team
	2) Emergency Medical Technician
EMT-P	Emergency Medical Technician - Paramedic
EMWIN	Emergency Managers Weather Information Network
ENDEX	End of Exercise
ENR	Environmental and Natural Resources
ENS	Emergency Notification Service
ENSO	El Nino / Southern Oscillation
E.O.	Executive Order of the President
EO	1) Electro-Optical
	2) Emergency Office
	3) Environmental Officer
	4) Executive Order
	5) Exterior Orientation (Parameter)
EOC	1) Emergency Operating Center/Emergency Operations Center
	2) European Olympic Committee(s)
EOD	1) Entered on Duty
	2) Explosive Ordnance Disposal
EOE	Equal Opportunity Employer
EOEA	Executive Office of Environmental Affairs
EOF	1) Emergency Operations/Operating Facility
	2) End-of-File
EO/IR	Electro Optical/Infrared
EOIR	Executive Office for Immigration Review
EOM	End of Month
EOO	Emergency Operations Organization
EOP	1) Emergency Operations/Operating Plan
	2) Executive Office of the President
	3) Extent of Play
EOS	1) Earth-Observing System
	2) Emergency Operations Software
	3) Equation Of State
EOT	Emergency Operations Team
EOV	Emergency Operations Vehicle
EOW	Envelope of Water
EP	Electric Power
EPA	[United States] Environmental Protection Agency
EPC	Emergency Preparedness Canada
EPCRA	Emergency Planning and Community Right-to-Know Act
EPD	Electronic Personnel Dosimeter
EPG	Emergency Planning Guide
EPI	Emergency Public Information
EPIC	1) Emergency Preparedness Information Coordinator
	2) Electronic Privacy Information Center ("No fly" list; epic.org)
EPLO	Emergency Preparedness Liaison Officer
EPO	Environmental Protection Officer
EPOC	1) Emergency Point(s) of Contact
	2) Emergency Preparedness Operations Center
EPP	1) Executive Potential Program
	2) Emergency Preparedness Program
EPPC	Emergency Prevention and Preparedness Council 
EPPM	Emergency Planning, Preparedness, and Mobilization
EPR or EP&R	Emergency Preparedness and Response
EPS	Encapsulated PostScript
EPZ	Emergency Planning Zone
EQPCE	Earthquake Preparedness Center of Expertise
EQUIP	Earthquake Impacts Projection (Model)
ER	1) Emergency Relief
	2) Emergency Room
	3) Equal Rights
ERA	Equal Rights Amendment
ERAMS	Environmental Radiation Ambient Monitoring System
ERB	Economic Resources Board
ERC	Emergency Response Coordinator
ERCG	Emergency Response Coordination Group
ERCP	Emergency Response Concept Plan
ERDA	Energy Research and Development Administration
ERDEC	Edgewood Research, Development and Engineering Center
ERF	Emergency Response Facility
ERG	Emergency Relocation Group
ERL	Environmental Research Laboratories 
ERLink	Emergency Response Link
ERM	1) Elevation Reference Mark
	2) Enforcement Removal Module (replaces DACS)
ERMS	Emergency Resource Management System
ERN	Emergency Response Network
EROS	Earth Resources Observing Satellite
ERP	1) Elevation Reference Point
	2) Emergency Response Plan
	3) Expedited Removal Process
ERPA	Emergency Response Planning Area
ERPG	Emergency Response Guidelines
ERPS	Effluents Radiation Protection Section
ERRO	Emergency Response/Recovery Office (USACE)
ERRS	Emergency and Rapid Response Services
ERS	1) Emergency Relocation Site
	2) Executive Reporting System
ERSAC	Emergency Response Senior Advisory Committee
ERT	1) Emergency Response Team
	2) Environmental Response Team
	3) Evidence Response Team
ERT-A	Emergency Response Team - Advance Element
ERT-N	National Emergency Response Team
ERT-N-NCR	National Emergency Response Team for the National Capital Region
ERT-S	Emergency Response Team Support Capability
ERV	Emergency Response Vehicle
ERW	Enhanced Radiation Weapon
ES	1) Emergency Support
	2) Environmental Specialist
	3) Executive Secretariat
ESA	Endangered Species Act
ESAP	Energy Security and Assurance Program
ESC	Executive Steering Committee
ESDP	Engineering Study Data Package
ESDPF	Engineering Study Data Package Facility
ESDRB	Emergency Services and Disaster Relief Branch
ESF	Emergency Support Function(s)  [see below]
ESF 01	Transportation 
ESF 02	Communications 
ESF 03	Public Works and Engineering
ESF 04	Firefighting 
ESF 05	Emergency Management
ESF 06	Mass Care, Housing and Human Services
ESF 07	Resource Support
ESF 08	Public Health and Medical Services 
ESF 09	Urban Search and Rescue 
ESF 10	Oil and Hazardous Materials Response
ESF 11	Agriculture and Natural Resources
ESF 12	Energy 
ESF 13	Public Safety and Security
ESF 14	Long-term Community Recovery and Mitigation
ESF 15	External Affairs
ESFLG	Emergency Support Function Leaders Group
ESGR	Employer Support of the Guard and Reserve
ESIC	Earth Science Information Center
ESN	Electronic Serial Number
ESP	1) Early Site Permit
	2) Electric Service Priority
ESSV	Emergency Support Service Vehicle
EST	1) Eastern Standard Time (GMT - 5)
	2) Emergency Support Team
ESTED	Estimated Safe Time before Evacuation Decisions
ET	1) End-of-Transect (Line)
	2) Electronic Technician
ETA	1) Estimated Time of Arrival
	2) Employment and Training Administration
ETC	1) et cetera
	2) Emergency Transportation Center
ETD	1) Estimated Time of Departure
	2) Explosives Trace Detector
ETE	1) Estimated Time Enroute
	2) Evacuation Time Estimate
ETIC	Estimated Time in Commission
ETIS	Emergency Traffic Information System
ETJ	Extraterritorial Jurisdiction (Limits)
ETO	Exercise and Training Officer
ETOC	Emergency Tactical Operations Center
ETRMS	Emergency Transportation Resource Management System
ETS	Evacuation Time Study
ETT	Eligible Travel Trailer
EU	European Union
EW	Emergency Worker
EWAC	Emergency Worker and Assistance Center
EWC	Emergency Worker Center
EWI	Entry Without Inspection
EWMDS	Emergency Worker Monitoring and Decontamination Station
EWO	Emergency War Order
EWP	Emergency Watershed Protection
EWRI	Environmental and Water Resources Institute
EXB	Export-Import Bank
EXORD	Execution Order
EXPLAN	Exercise Plan
FAA	1) Federal Aviation Administration
	2) Foreign Assistance Act
FAAS	FEMA Automated Acquisition System
FAAT	1) FEMA Acronyms, Abbreviations, & Terms
	2) Fully Analytical Aerial Triangulation
FAB	FEMA Advisory Board
FAC	1) Family Assistance Center
	2) Financial Attack Center
	3) Foreign Air Carrier
FACA	Federal Advisory Committee Act
FACNET	Federal Acquisition Network
FADED GIANT	Nuclear reactor radiological incident/ accident
FAE	Fuel Air Explosives
FAEST	Forward Area Emergency Support Trailers
FAIH	Federal Assistance to Individuals and Households
FAIR	1) Fair Access to Insurance Requirements
	2) [Refers to the] FAIR Act
FAM	Federal Air Marshal
FAMA	Fire Apparatus Manufacturer's Association
FAMAS	Facility Accreditation Management and Administration System
FAMS	Federal Air Marshal Service
FANMAP	FEMA Automated Network Management Program
FAO	1) Federal Approving Officer (or Official)
	2) Food & Agricultural Organization (UN)
FAOC	FEMA Alternate Operations Center
FAPRS	Federal Access Program Retrieval System
FAQ(S)	Frequently Asked Question(s)
FAR	1) Federal Acquisition Regulation
	2) Federal Aviation Regulations
FARS	Financial Accounting and Reporting System
FAS	1) Foreign Agricultural Service
	2) Freely Associated States
FASSE	Federal Agency Support Service Element
FasT	Field Assessment Team
FAX	Facsimile
FBFM	Flood Boundary and Floodway Map
FBI	Federal Bureau of Investigation [ESF-13]
FBIIC	Financial and Banking Information Infrastructure Committee
FBN	Federal Base Network
FBO	Fixed Base Operator
FBR	Fast Breeder Reactor
F-codes	Charge codes for FEMA incidents
FC	1) Fire Control
	2) Fire Corps (Citizen Corps Program Partner administered by USFA)
FCA	Farm Credit Administration
FCC	1) Federal Communications Commission
	2) Federal Coordinating Center
FCD	Financial Crimes Division
FCE	Functional Capability Element
FCIC	Federal Crop Insurance Corporation
FCIP	Federal Crime Insurance Program
FCIS	Federal Crime Insurance System
FCM	Federal Communications Manager
FCO	Federal Coordinating Officer
FCP	1) Field/Forward Command Post
	2) Federal Center Plaza
FCS	1) Food and Consumer Service
	2) Farm Credit Service
FCSA	Fee-Charge System Administrator
FCT	Forward Coordinating Team
FD	1) Fire Department
	2) Foundation Data
FDA	Food and Drug Administration
FDIC	Federal Deposit Insurance Corporation
FDL	Forensic Documents Laboratory
FDMS	Federal Docketing Management System
FDO	Flight Deck Officer
FDSS	Federal Drug Seizure System
FE	Functional Exercise
FEB	1) Federal Executive Board
	2) Federal Executive Branch
FEC	Facility Emergency Coordinator
FECA	Federal Employees Compensation Act
FECC	Federal Emergency Communications Coordinator
FedCIRC	Federal Computer Incident Response Center
FEDD	Flood Elevation Determination Docket
FED-STD	Federal Standard
FED - TRT	Federal Tactical Response Team
FEEA	Federal Employee Education & Assistance
FEFFLA	Federal Employees Family Friendly Leave Act
FEGLI	Federal Employees Group Life Insurance
FEHB	Federal Employees Health Benefits
FEI	Federal Executive Institute
FEIS	Final Environmental Impact Statement
FEMA	Federal Emergency Management Agency [ESF-5]
FEMAAR	Federal Emergency Management Agency Acquisition Regulation
FEMIS	Federal Emergency Management Information System
FERC	1) Federal Energy Regulatory Commission
	2) FEMA Emergency Response Capability
FESC	Federal Emergency Support Coordinator
FESHE	Fire and Emergency Services Higher Education 
FEST	Foreign Emergency Support Team
FF	Firefighter
FFCD	Full, Final, and Complete Disclosure
FFDO	Federal Flight Deck Officer
FFE	Federal Field Exercise
FFI	Financial Fraud Institute
FFRDC	Federally Funded Research & Development Center
FGCC	Federal Geodetic Coordinating Committee
FGDC	Federal Geographic Data Committee
FHA	1) Federal Housing Administration
	2) Flood Hazard Area(s)
FHAR	Flood Hazard Analyses Report
FHBM	Flood Hazard Boundary Map
FHM	Flood Hazard Mapping
FHML	Federal Hazardous Material Law
FHWA	Federal Highway Administration
FIAB	Foreign Intelligence Advisory Board
FICC	Federal Interagency Coordination Council
FICEMS	Federal Interagency Committee on Emergency Medical Services
FICO	Flood Insurance Claims Office(r)
FIDLER	Field Instrument for the Detection of Low Energy Radiation
FIMO	Federal Incident Management Official
FinCen	Financial Center
FIOC	Federal Interagency Operations Center
FIP	Federal Information Processing
FIPNC	Flood Insurance Producers National Committee
FIPS	1) Federal Information Processing Standards (Code)
	2) FOIA Information Processing System
FIR	1) Federal Inspection Report
	2) Final Inspection Report
	3) Flood Insurance Report
FIRESAT	Fire-Detection Satellite System (previously known as the Integrated Hazard Information System)
FIRM	Flood Insurance Rate Map
FIRM-DLG	Flood Insurance Rate Map-Digital Line Graph
FIRMR	Federal Information Resources Management Regulation
FIRST	1) Federal Incident Response Support Team 
	2) Federal Initial Response Support Team
FIS	Flood Insurance Study
FISA	Foreign Intelligence Surveillance Act
FISH	Forensic Information System for Handwriting
FIT	1) Failed Income Test
	2) Financial Information Tool
FLAG	FEMA Logistics Advisory Group
FLAR	Forward Looking Airborne Radar
FLETC	Federal Law Enforcement Training Center
FLEX	Federal or FEMA Leadership Exercise
FLIR	Forward-Looking Infrared
FLRA	Federal Labor Relations Authority
FLS	Flood Statement
FM	1) Financial Management
	2) Force Module
	3) Frequency Modulation
FMA	Floodplain Management Association
FMAGP	Fire Management Assistance Grants (or Grant Program)
FMANA	Fire Marshals Association of North America
FMAP	1) Fire Management Assistance Program
	2) Flood Mitigation Assistance Program
FMC	1) Federal Management Circular
	2) Federal Maritime Commission
	3) Federal Mobilization Center 
	4) Fully Mission Capable
FMCIMS	Flood Map Center Inventory Management System
FMCS	Federal Mediation and Conciliation Service
FMCSA	Federal Motor Carrier Safety Administration
FMDC	Flood Map Distribution Center
FME	Federally Managed Exercise
FMH	Federal Meteorological Handbook
FmHA	Farmers Home Administration
FMHCSS	Federal Manufactured Home Construction and Safety Standards
FMLA	Family and Medical Leave Act
FMO	Fire Management Officer
FMR	Fair Market Rental
FMS	Financial Management System
FMSIS	Flood Map Status Information Service
FMT	Field Monitoring Team
FMV	Fair Market Value
FNARS	FEMA National Radio System
FNF	Fixed Nuclear Facility(ies)
FNS	Food and Nutrition Services
FOB	Federal Office Building
FOC	1) FEMA Operations Center
	2) Forward Operations Center
	3) Free Of Charge
	4) Full Operating Capability
FOD	Foreign Object Damage
FOF	Field Operating Facility
FOG	Field Operating (or Operations) Guide
FOIA	Freedom of Information Act
FONSI	Finding Of No Significant Impact
FORSCOM	Forces Command
FOS	1) Family of Services
	2) Federal Operations Support
FOSC	Federal On-Scene Coordinator
FOUO	For Official Use Only
FOV	Field Of View
FPA	Federal Preparedness Agency (obsolete)
FPC	1) Federal Power Commission
	2) Federal Preparedness Circular
FPDL	Fire Protection Demonstration Lab
FPEIS	Federal Programmatic Environmental Impact Statement
FPF	Federal Policy Fee
FPG	Federal Preparedness Guide
FPI	Floodplain Information Report
FPL	Florida Power & Light
FPMR	Federal Property Management Regulation
FPO	1) Federal Preservation Officer
	2) Flood Potential Outlook
FPS	Federal Protective Service
FR	1) Federal Register
	2) Field Reference
FRA	Federal Railroad Administration
FRB	Federal Reserve Board
FRC	1) Federal Records Center
	2) Federal Regional Center
	3) Federal Resource Coordinator 
	4) Federal Response Center
FRCA	Findings Requiring Corrective Action
FRCM	FEMA Regional Communications Manager
FRD	Formerly Restricted Data
FRERP	Federal Radiological Emergency Response Plan
FRID	Flood Risk Directory
FRMAC	Federal Radiological Monitoring and Assessment Center
FRMAP	Federal Radiological Monitoring and Assessment Plan
FRMT	Field Radiological Monitoring Team
FRN	1) Federal Register Notice
	2) Federal Reserve Note
	3) FEMA Radio Network
FRO	Flood Response Office
FRP	Federal Response Plan (now NRP)
FRPCC	Federal Radiological Preparedness Coordinating Committee
FRPG	Federal Response Planning Guidance
FRS	1) Federal Reserve System
	2) Federal Response Subcommittee
FRSA	Federal Railroad Safety Act
FRSSB	Facilities Radiological Safety and Safeguards Branch
FRTIB	Federal Retirement Thrift Investment Board
FRZ	Flight Restricted Zone
FS	1) Feasibility Study
	2) [United States] Forest Service [ESF-4]
FSA	1) Farm Service Agency
	2) Fire Suppression Assistance
	3) Forward Staging Areas
FSAR	Final Safety Analysis Report
FSB	Forward Support Base
FSC	1) Federal Support Center
	2) FEMA Storage Center
FSD	1) Federal Security Director
	2) Forensic Services Division
FSDO	Flight Service District Office
FSE	Full-Scale Exercise
FSG	Financial Services Group
FSH	Forest Service Handbook
FSIS	Food Safety and Inspection Service
FSIU	Field Support Intelligence Unit
FSL	Federal, State, Local
FSLIC	Federal Savings and Loan Insurance Corporation
FSM	Federated States of Micronesia
FSN	1) Federal Stock Number
	2) FEMA Switched Network
FSO	Free Space Optics
FSR	Financial Status Report
FSS	1) Family Support Services
	2) Federal Supply Service
FSSA	Flight School Security Awareness
F&STD	Fire and Safety Test Detachment
FSTS	Federal Secure Telephone System
FSVS	FEMA Secure Video System
ft	foot/feet
FT	Full-Time
FTA	Federal Transit Administration
FTAA	Free Trade Area of the Americas
FTC	1) Federal Trade Commission
	2) Federal Training Coordinator
	3) Field Team Coordinator
FTD	Federal Travel Directory
FTE	Full-Time Equivalent
ft/min	feet per minute
ft3/min	cubic feet per minute
FTO	Foreign Terrorist Organizations
FTP	File Transfer Protocol
FTS	1) Federal Telecommunications (or Telephone) System (or Service)
	2) Forms Tracking System
FTSS	Federal Training Support Staff
FTTTF	Foreign Terrorist Tracking Task Force
FTX	Field Training Exercise
FW	Fire Weather
FWAN	FEMA Wide Area Network
FWCA	Fish and Wildlife Coordination Act
FWD	Forward
FWP	Federal Women's Program
FWPCA	Federal Water Pollution Control Act
FWS	(U.S.) Fish and Wildlife Service
FY	Fiscal Year
FYHSP	Future Years Homeland Security Program
FYI	For Your Information
FZ	Flood Zone
FZDC	Flood Zone Determination Company
GA	General Adjuster
GAAP	Generally Accepted Accounting Principles
GAAS	Generally Accepted Auditing Standards
GAAWG	General Aviation Airports Working Group
GACC	Geographic Area Coordination Center
GA/FBO	General Aviation/Fixed-Base Operations
gal	gallon
GAMA	General  Aviation Manufacturers Association
GANTSEC	Greater Antilles Section
GAO	General Accounting Office
GAR	Governor's Authorized Representative
GB	Gigabyte
GBL	Government/General Bill of Lading
GBPS	Gigabytes Per Second
GC	General Counsel (see also OGC)
GCCS	Global Command and Communications System
GCE	Government Cost Estimate
GCF	Ground Concentration Factor
GCO	Grant Coordinating Officer
GCOS	Global Climate Observing System
GCS	Ground Control Station
GDIN	Global Disaster Information Network
GDNP	Gross Domestic National Product
GDS	Geographic Display System
GDSS	Global Decision Support System
GDT	Ground Data Terminal
Ge (Li)	Lithium Drifted Germanium
GE	General Emergency
GEMA	Georgia Emergency Management Agency
GEMINI	Global Emergency Management Information Network Initiative
GEMS	Global Emergency Management System
GETS	Government Emergency Telecommunications System/Service
GeoTIFF	Georeferenced Tagged Image File Format
GFE	Government-Furnished Equipment
GFI	Government-Furnished Information
GFIP	Group Flood Insurance Policy
GFIRST	Government Forum of Incident Response and Security Team
GFM	1) Generic Financial Module (NEMIS)
	2) Government-Furnished Material
GGI&S	Global Geospatial Information and Services
GHAD	Geologic Hazard Abatement District
GI	1) Geographic Information
	2) Ground Infantry
GIL	Grant-In-Lieu
GILS	Government Information Locator Service,
GIS	Geographic Information System(s)
GIWW	Gulf Intracoastal Waterway
GLPAC	Great Lakes Pilotage Advisory Committee
GLWRM	Great Lakes Wave Runup Model
G-M	Geiger-Mueller (radiation detector)
GM	Guidance Memorandum
GMDSS	Global Maritime Distress and Safety System
GMF	Government Master File
GMO	genetically modified organism
GMR	Graduated Mobilization Response
GMT	Greenwich Mean Time (aka ZULU Time)
GNIS	Geographic Names Information System
GOALS	Government On-Line Accounting Link System
GOES	Geostationary Operational Environmental Satellite
GOGO	Government-Owned, Government-Operated
GOSC	Global Operations Security Center
GOTS	Government Off-The-Shelf
GOV	Government Owned Vehicle
GPL	1) General Population Level
	2) General Population Limit
GPLD	Government Property Lost or Damaged
GPM	gallons per minute
GPMRC	Global Patient Movement Requirements Center
GPO	Government Printing Office
GPRA	Government Performance and Results Act
GPS	Global Positioning System
GRASS	Geographic Resources Analysis and Support System
GRP	Grant Reporting Portal 
GRS	Geodetic Reference System
GS	1) General Schedule
	2) Geological Survey
	3) Geo-Stationary
GSA	General Services Administration
GSAAR	General Services Administration Acquisition Regulation
GSACR	GSA Communications Representative
GSE	Government-Sponsored Enterprise
GST	Ground Support Team
GTA	1) Government Travel Account
	2) Government Travel Authorization
GTM	Government Technical Monitor
GTR	1) Government Technical Representative
	2) Government Transportation Request
GTS	Global Telecommunications System
GUI	Geographical User Interface
GVO	Green Vinyl Overboot
GWA	Government Wide Accounting
h (also hr)	hour
HA	Housing Assistance
HADT	Hawaiian Daylight Time  (GMT - 9)
HAG	Highest Adjacent Ground [grade]
HAI	Human Affairs International
HALE	High Altitude Long Endurance (see also MALE)
HAN	Health Alert Network
HARN	High Accuracy Reference Network
HARTline	Hillsborough Area Regional Transit Authority (Florida)
HAST	1) Hawaiian Standard Time  (GMT - 10)
	2) Humanitarian Assistance Survey Team
HAWAS	Hawaiian Warning System
HAZMAT	Hazardous Material(s)
HAZMIN	Hazard Minimization
HAZMIT	Hazard Mitigation
HAZUS	Hazards - United States
HAZUS-MH	Hazards - United States (Multi-Hazard)
HAZWOPER	Hazardous Waste Operation and Emergency Response
HBX	High-Blast Explosive
HC	Health Canada
HCF	Height Correction Factor
HCFA	Health Care Financing Administration
HCO	Human Capital Office
HCTS	Hazardous Cargo Transportation Security
HD	Hurricane Day
Hdbks	Handbooks
HDD	Heating Degree Days
HDP	Hurricane Destruction Potential
HE	High Explosive
HEAR	Hospital Emergency Administrative Radio
HEC	Hydrologic Engineering Center
HEICS	Hospital Emergency Incident Command System
HELP	Health Emergencies in Large Populations
HEMP	High Altitude Electromagnetic Pulse
HEPA	High Efficiency Particulate Air (as in filters)
HERN	Hospital Emergency Radio Network
HERT	Hospital Emergency Response Team
HES	Hurricane Evacuation Study
HET	Headquarters Emergency Transportation
HEU	Highly Enriched Uranium
HEW	Health, Education, and Welfare
HF	1) High Frequency
	2) hydrogen fluoride
HF/SSB	High Frequency / Single Side Band
H&H	1) Hydraulics and Hydrology
	2) Hydrologic and Hydraulic (Analyses)
HHA	High Hazard Area
HHC	Headquarters and Headquarters Company
HHD	Headquarters and Headquarters Detachment
HHMD	Hand-Held Metal Detector
HHS	Health and Human Services, Department of [ESF-8]
HHSEOC	Health and Human Services Emergency Operations Center
HIC	Hydrologist-in-Charge
HIDTA	High Intensity Drug Trafficking Area
HIP	Housing Improvement Program
HIPAA	Health Insurance Portability and Accountability Act
HIRA	Hazard Identification and Risk Assessment
HITRON	Helicopter Interdiction Tactical Squadron
HL	1) Hotline
	2) Help Line
HLS	1) Hurricane Local Statement
	2) Homeland Security
HLT	Hurricane Liaison Team
HLW	High-Level Waste
HM	1) Hazard Mitigation
	2) Hazardous Materials
HMAC	Hazardous Materials Advisory Council
HMC	Hazard Mitigation Coordinator
HME	Health, Medical, and Environmental
HMEP	Hazardous Materials Emergency Preparedness
HMGP	Hazard Mitigation Grants Program
HMIX	Hazardous Materials Information Exchange
HMMWV	Highly Mobile Multipurpose Wheeled Vehicle
HMRU	Hazardous Materials Response Unit (FBI)
HMST	Hazard Mitigation Survey Team
HMTA	Hazardous Materials Transportation Act
HMTAP	Hazard Mitigation Technical Assistance Program (or Plan)
HMTUSA	Hazardous Materials Transportation Uniform Safety Act
HNAT	Human Needs Assessment Team
HOB	Height of Burst
HOH	Head Of Household
HOO	[NRC] Headquarters Operations Officer
HOPWA	Housing Opportunities for Persons With AIDS
HOTMAC	High Order Turbulence Model for Atmospheric Circulation
HP	1) Hewlett-Packard
	2) Historic Preservation
	3) Hurricane Program
HPAC	Hazard Prediction and Assessment Capability
HPC	Hydrometeorological Prediction Center
HPRP	Home Protection Roofing Program
HPSI	High Pressure Safety Injection
HPT	Health Physics Technician
HQ	Headquarters
HQDA	Headquarters, Department of the Army
HQUSACE	Headquarters, US Army Corps of Engineers
HR	1) Home Repair
	2) House of Representatives
	3) Human Resources
HRCQ	Highway Route Controlled Quantity
HRD	Human Resources Division
HRDI	High Resolution Doppler Imager
HRMS	Human Resources Management System
HRPT	High Resolution Picture Transmission
HRT	Hostage Rescue Team
HRV	Human Rights Violator/Violation
HS	1) Homeland Security
	2) Human Services
HSAC	Homeland Security Advisory Council
HSARPA	Homeland Security Advanced Research Projects Agency
HSAS	Homeland Security Advisory System
HSC	1) Health Service Command
	2) Homeland Security Center
	3) Homeland Security Council (formerly OHS)
HSDN	High Seas Drift Nets
HSEEP	Homeland Security Exercise Evaluation Program
HSIA	Homeland Security Industry Alliance
HSIN	Homeland Security Information Network (see JRIES)
HSIPP	Homeland Security Integrated Planning Process
HSLD	Historic Shoreline Location Database
HSO	Human Services Officer
HSOC	Homeland Security Operations Center
HSPCD	Historic Shoreline Positional Change Database
HSPD	Homeland Security Presidential Directive
HSS	1) Health Service Support
	2) Hyperspectral Sensor System
HSTF	Homeland Security Task Force
HSTTIG	Homeland Security Terrorist Threat Intelligence Group
HSUS	The Humane Society of the United States
HTGR	High-Temperature Gas-Cooled Reactor
HTML	HyperText Markup Language
HUB	Historically Underutilized Business
HUD	Housing and Urban Development, Department of
HUG	HAZUS User Group
HUMINT	Human Intelligence
HURCON	Hurricane Condition
HUREVAC	Hurricane Evacuation
HVA	Hazard Vulnerability Analysis
HVAC	Heating, Ventilating, and Air Conditioning
HVT	High Value Target
HWC	Health and Welfare Canada
HWL	High Water Line
HWM	High Water Mark
HWR	Heavy Water Reactor
Hz	Hertz (cycle per second)
I	1) Individual/Family
	2) Iodine Exposure Intensity
IA	1) In and Around
	2) Individual Assistance  
	3) Information Analysis
	4) Information Assurance
	5) Inter-agency   
	6) Internal Affairs
	7) International Affairs (see OIA)
IAA	Interagency Agreement
IAB	Interagency Board
IAC	(DoD) Information Analysis Center
IACG	Interagency Airspace Coordination Guide
IACNDR	Inter-American Committee for Natural Disaster Reduction
IACP	International Association of Chiefs of Police
IAE	Integrated Acquisition Environment (eGovernment Initiative)
IAEA	International Atomic Energy Agency
IAEM	International Association of Emergency Managers
IAFC	International Association of Fire Chiefs
IAFF	International Association of Fire Fighters
IAFIS	Integrated Automated Fingerprint Identification System
IAG	Interagency Advisory Group
IAI	International Association for Identifications
IAIP	Information Analysis and Infrastructure Protection [DHS Directorate]
IAM	Incident Activity Manager
IAO	Individual Assistance Officer
IAP	Incident Action Plan
IARLJ	International Association of Refugee Law Judges
IARR	Interagency Resource Representative
IASIR	International Association of Security and Investigative Regulators
IAT	Incident Assessment Team
IATA	International Air Transport Association
IATBOG	Interagency Airtankers Base Operations Guide
IAW	In accordance with
IBA	Incident Business Advisor
IBAD	Interim Biological Agent Detector
IBC	International Broadcast Center
IBD	Improvised Biological Device
IBDS	Integrated Biological Detection System
IBET	Integrated Border Enforcement Team
IBHS	Institute for Business and Home Safety
IBIS	Interagency Border Inspection System
IBS	Integrated Baseline System
IBT	International Brotherhood of Teamsters
IBWA	International Bottled Water Association
IC	1) Incident Command/Commander
	2) Information Collection
	3) Intelligence Community 
ICAF	Industrial College of the Armed Forces
ICAO	International Civil Aviation Organization
ICAP	Incident Communications Action Plan
ICBM	Intercontinental Ballistic Missile
ICC	1) Incident Command Center
	2) Increased Cost of Compliance
	3) Intelligence Control Center
	4) International Code Council
ICCB	Intergovernmental Consultation and Coordination Board(s)
ICCOH	Interagency Coordinating Committee On Hurricanes
ICD	1) Improvised Chemical Device
	2) Infrastructure Coordination Division
	3) Institute of Chemical Defense
ICE	1) Immigration and Customs Enforcement, Bureau of (also called BICE)
	2) Interoperable Communications Equipment
ICER	Incident Communications Emergency Reference
ICF	1) Incident Command Facility
	2) Insulating Concrete Forms
ICGP	Interoperable Communications Grant Program
ICIMPP	Integrated Civilian Industrial Mobilization Planning Process
ICISF	International Critical Incident Stress Foundation
ICITAP	International Criminal Investigative Training Assistance Program
ICMA	International City/County Management Association
ICMOP	Integrated CONUS Medical Operations Plan
ICODS	Interagency Committee on Dam Safety
ICP	1) Incident Command Post
	2) Information Collection Plan
	3) Integrated Cargo Processing
ICPACC	Incident Communications Public Affairs Coordination Committee
ICPAE	Interagency Committee on Public Affairs in Emergencies
ICPO	(see INTERPOL)
ICPS	Integrated Card Production System
ICRC	International Committee of the Red Cross
ICRP	International Commission on Radiological Protection
ICS	1) Incident Command System
	2) Initial Contingency Staff
ICSSC	Interagency Committee on Seismic Safety in Construction
ICU	1) Information Coordination Unit
	2) Incident Crisis Unit
	3) Intensive Care Unit
ICWW	Intracoastal Waterway
ID	1) Identification credentials
	2) Infectious Disease
IDE	Intrusion Detection Equipment [see IDS]
IDEM	Iowa Department of Emergency Management
IDENT	Automated Biometric Fingerprint Identification System
IDEX	Image Data Exploitation (System)
IDIQ	Indefinite Delivery, Indefinite Quantity
IDLH	Immediate Danger to Life and/or Health
IDP	Imagery-Derived Product
IDPP	Infectious Disease Prevention Program
IDR	Institute for Disaster Research
IDS	1) Information Display System
	2) Integrated Deepwater System
	3) Intrusion Detection System
IE	Initial Elevation (Line)
IEA	1) Immigration Enforcement Agent
	2) International Energy Agency
IEC	1) InterExchange Carrier
	2) Integrated Exploitation Capability
IED	1) Improvised Explosive Device
	2) Incendiary Explosive Device
IEMA	Illinois Emergency Management Agency
IEMC	Integrated Emergency Management Course
IEMG	International Emergency Management Group
IEMIS	Integrated Emergency Management Information System
IEMS	Integrated Emergency Management System
IEP	Ingestion Exposure Pathway
IEVS	Income Eligibility Verification System
IF	Inland Fetch (Line)
IFALPA	International Federation of Airline Pilots Association
IFB	Invitation for Bid
IFG	Individual and Family Grant
IFGP	Individual and Family Grant Program
IFLOWS	Integrated Flood Observing and Warning System
IFMIS	Integrated Financial Management Information System
IFPA	Institute for Foreign Policy Analysis, Inc.
IFR	1) Instrument Flight Rules
	2) Interim Final Rule
IFSAR	Interferometric Synthetic Aperture Radar
IFTP	Internet Forensic Training Program
IG	1) Inspector General (see also OIG)
	2) Instructor Guide
IGE	Independent Government Estimate
IGPT	Interagency Geospatial Preparedness Team
IH	1) Inhalation 
	2) Intense Hurricane
IHC	1) Interagency Hotshot Crew
	2) International Hurricane Center
IHD	Intense Hurricane Day
IHE	Insensitive High Explosive
IHMT	Interagency Hazard Mitigation Team
IHOG	Interagency Helicopter Operation Guide
IHP	Individuals and Households Program
IHS	Indian Health Service
IIC	1) Interagency Intelligence Cell
	2) Investigator in Charge
IICT	Interagency Intelligence Committee on Terrorism
IIFC	Information/Intelligence Fusion Center
III	Interstate Identification Index
IIMG	Interagency Incident Management Group
IIOM	Install, Integrate, Operate, and Maintain
IIPLR	Insurance Institute for Property Loss Reduction
IIPO	Information Integration Program Office
IIS	[Microsoft] Internet Information Server
IIT	Incident Investigation Team
IITP	Internet Investigations Training Program
ILE	Installations, Logistics & Environment
ILEA	International Law Enforcement Academy
ILS	Integrated Logistics Support
IMA	Individual Mobilization Augmentee
IMAAC	Interagency Modeling and Atmospheric Assessment Center
IMAC	Infrastructure Monitoring, Analysis, and Coordination
IMC	1) Instrument Meteorological Conditions
	2) Interim Message Change
	3) International Mechanical Code
	4) International Medical Corps
IMCS	Incident Management Communications Systems
IMG	Information Management Group
IMINT	Imagery Intelligence
IMO	International Maritime Organization
IMPAC	International Merchant Purchase Authorization Card
IMRD	Information Management and Requirements Division
IMS	1) Incident Management System
	2) Information Management System
	3) Intelligence Management System
IMSR	Incident Management Situation Report
IMSuRT	International Medical Surgical Response Team
IMT	1) Incident Management Team
	2) Integrated Management Team
IMU	Inertial Measurement Unit
INA	Immigration and Nationality Act
IND	Improvised Nuclear Device
INEEL	Idaho National Engineering and Environmental Laboratory
INER	Interagency National Executive Reserve
INES	International Nuclear Event Scale
INF	1) Infrastructure
	2) Immediate Needs Funding
INFO	Information
INFOSEC	Information Security
INMARSAT	International Maritime Satellite
INPO	Institute for Nuclear Power Operations
INPHO	Information Network for Public Health Officials
INRP	Initial National Response Plan
INS	1) Immigration and Naturalization Service
	2) Inertial Navigation System
	3) Insurance
INSARAG	International Search and Rescue Advisory Group
Insp	Inspection
INTERCOM	Internal Communications
INTERPOL	International Criminal Police Organization
IOC	1) Initial Operational Capability
	2) International Olympic Committee
IOF	1) Initial Operating Facility 
	2) Interim Operating Facility
IOR	Initial Operating Report
IOS	International Organization for Standardization
I&P or I/P	Information and Planning
IP	1) Implementing Procedure
	2) Information and Planning
	3) Infrastructure Protection
IPC	1) Interagency Planning Committee
	2) International Paralympic Committee
IPE	1) Integrated Performance Evaluation
	2) Integrated Process Evaluation
IPFO	Interim Principle Federal Official
IPIA	Improper Payments Information Act
IPP	Imminent Peril to the Public
IPR	1) In-Process (or In-Progress) Review
	2) Initial Projections Report
	3) Intellectual Property Rights
IPS	1) Information and Planning Section
	2) Information Processing System
	3) International Port Security
IPSCOM	Imagery Policy and Security Committee
IPT	1) Integrated Process Team
	2) Integrated Product Teams
	3) Integrated Project Team
IPZ	Ingestion Pathway Zone
IR	Infrared
IRAC	Interagency Radiological Assistance Committee
IRB	1) Information Resources Board
	2) Investment Review Board
IRBM	Intermediate Range Ballistic Missile
IRC	1) International Residential Code
	2) Information Resources Center
IRF	Initial Response Force
IRFC	Initial Response Force Commander
IRI	Industrial Research Institute
IRIS	Incorporated Research Institutions for Seismology
IRM	Information Resources Management
IRMS	Information Resources Management Service
IRP	1) Institutional Removal Program
	2) Interior Repatriation Program
	3) Investment Review Process
IRPMR	Information Resources Procurement and Management Review
IRR	Initial Response Resource(s)
IRS	Internal Revenue Service
IRT	1) Independent Review Team
	2) Initial Response Team
IRZ	Immediate Response Zone
IS	1) Information Security
	2) Information System(s)
	3) Infrastructure Support
	4) Inspection Services
ISA	Incident Staging Area
ISAAG	Information Systems Architectural Advisory Group
ISABP	International South Atlantic Buoy Program
ISAC	1) Information Sharing and Analysis Center
	2) Infrastructure Sector Advisory Committee 
ISACA	Information Systems Audit and Control Association
ISAO	Information Sharing and Analysis Organization
ISAR	Inspection Services Activity Report
ISC	1) Inspection Services Coordinator 
	2) Interstate Commerce
ISCS	International Satellite Communications Systems
ISD	Infrastructure Services Division
ISDN	Integrated Services Digital Network
ISDR	International Strategy for Disaster Reduction
ISEMA	Indiana State Emergency Management Agency
ISI	Immigration Security Initiative
ISIP	Initial Strategy Implementation Plan
ISIS	Integrated Surveillance Intelligence System
ISMA	International Security Management Association
ISO	1) Incident Support Organization
	2) Insurance Services Office
	3) International Standards Organization
ISOC	1) Information Security Oversight Committee 
	2) Interagency SEAT Operations Guide
ISOO	Information Security Oversight Office
ISP	1) Immediate Services Program
	2) Information Security Program
	3) Information Systems Plan
	4) Intensive Supervision Program
	5) Interagency Security Plan
	6) Internet Service Provider
ISPAG	Information Systems Policy Advisory Group
ISR	Intelligence, Surveillance and Reconnaissance
ISSA	Information Systems Security Association
ISSP	Information Systems Security Program
IST	Incident Support Team
IST-A	Incident Support Team - Advance Element
I-STAFF	DHS Headquarters Operational Integration Staff
ISTEA	Intermodal Surface Transportation Efficiency Act
ISTL	Incident Support Team Leader
ISTS	Institute for Security Technology Studies
ISVB	Imagery Science Validation Board
IT	Information Technology
ITA	1) Information Technology Architecture
	2) Integrated Transport Analysis
ITAA	Information Technology Association of America
ITAAC	Inspections, Tests, Analyses, and Acceptance Criteria
ITAR	International Traffic in Arms Regulations
ITC	1) Information Technology Committee
	2) Information Technology Coordinator
	3) International Trade Commission
ITD	International Training Division
ITDS	International Trade Data System
I-Team	1) Incident Team
	2) Intelligence Team
ITED	IFSAR Terrain Elevation Data
ITF	Intelligence Task Force
ITI	International to International
ITIC	International Tsunami Information Center
ITM	Inspection Transfer Manager
ITMRA	Information Technology Management Reform Act of 1996
I-TRAP	Interagency Terrorism Response Awareness Program
ITS	1) Information Technology Services
	2) Intelligent Transportation System(s)
ITSD	Information Technology Services Directorate
ITSH	Internal Transport, Storage, and Handling
ITV	In-Transit Visibility
ITWG	International Technical Working Group
IVD	Interactive Video Disk
IVHHN	International Volcanic Health Hazard Network
IVR	Interactive Voice Response
I&W	Indications and Warning
IWIN	Interactive Weather Information Network
IWP	Integrated Warning Program
JAARS	Joint After-Action Reporting System
JAC	Joint Advisory Committee
JACADS	Johnston Atoll Chemical Agent Disposal System
JACE	Joint Assessment of Catastrophic Events
JAD	Joint Application Development
JAG	1) Joint Action Group
	2) Judge Advocate General (DoD)
JANAP	Joint Army-Navy-Air Force Publication
JATS	Joint Air Transportation System
JAWAS	Joint Automated Weather Observing System
JBPDS	Joint Biological Point Detection Systems
JCAH	Joint Commission on Accreditation of Hospitals
JCAHO	Joint Commission on Accreditation of Healthcare Organizations
JCC	Joint Coordination Center
JCS	Joint Chiefs of Staff
JDCC	Joint Data Coordination Center
JDISS	Joint Deployable Intelligence Support System
JDOMS	Joint Director of Military Support
JECG	Joint Exercise Control Group
JEEP	Joint Emergency Evacuation Plan
JEMP	Joint Exercise Management Program
JEOC	Joint Emergency Operations Center
JFACC	Joint Force Air Component Commander
JFC	Joint Force Commander
JFCOM	Joint Forces Command
JFHQ-HLS	Joint Forces Headquarters - Homeland Security
JFLCC	Joint Force Land Component Commander
JFO	Joint Field Office
JHAT	Joint Hazardous Assessment Team
JHEC	Joint Hazard Evaluation Center
JI	Johnston Island
JIACG	Joint Interagency Coordination Group
JIALO	Joint Interagency Liaison Officer
JIATF	Joint Interagency Task Force
JIB	Joint Information Bureau
JIC	1) Joint Information Center
	2) Joint ICE Center
	3) Joint Intelligence Center
JICPAC	Joint Intelligence Center, Pacific
JIISE	Joint Interagency Intelligence Support Element
JIMPP	Joint Industrial Mobilization Planning Process
JIOC	Joint Investigative Operations Center
JIS	Joint Information System
JIT	1) Job Instruction Training
	2) Just In Time
JMC	Joint Movement Center
JMFU	Joint METOC Forecast Unit
JMIP	Joint Military Intelligence Program
JMMO	Joint Medical Mobilization Office
JMRO	Joint Medical Regulating Office
JMT	Joint Management Team (combination of IST and MST - US&R and DMAT or NDMS)
JNACC	Joint Nuclear Accident Coordinating Center
JOA	Joint Operational Area
JOC	Joint Operations Center
JOPES	Joint Operations Planning and Execution System
JPAC	Joint Planning Augmentation Cell (for CBIRF)
JPATS	Justice Prisoner and Alien Transportation System
JPEG	Joint Photographic Experts Group
JPIC	Joint Public Information Center
JPMRC	Joint Patient Movement Requirements Center
JPMT	Joint Patient Movement Team
JPO	Joint Program Office
JRERP	Joint Radiological Emergency Response Plan
JRIES	Joint Regional Information Exchange System (see HSIN)
JRMP	Joint Regional Medical Planner
JRMPO	Joint Regional Medical Planning Office
JRS	Joint Reporting System
JRT	Joint Response Team
JSCP	Joint Strategic Capabilities Plan
JSOTF	Joint Special Operations Task Force
JSTARS	Joint Surveillance Target Attack Radar System
JTA	Jacksonville Transportation Authority
JTF	Joint Task Force
JTF-CM	Joint Task Force - Consequence Management
JTF-CS	Joint Task Force - Civil Support
JTF-FF	Joint Task Force - Firefighter  
NTF-NCR	Joint Task Force - National Capital Region
JTOT	1) Joint Tactical Operations Team
	2) Joint Technical Operations Team
JTPA	Job Training Partnership Act
JTR	Joint Travel Regulations
JTRB	Joint Telecommunications Resources Board
JTTF	Joint Terrorism Task Force
JTWC	Joint Typhoon Warning Center
JWICS	Joint Worldwide Intelligence Communications System
JWID	Joint Warrior Interoperability Demonstration 
k	kilo
KAPP	Key Asset Protection Program (obsolete; see CAAP)
kB	Kilobyte
Kb	Kilobit
kBPS	Kilobits Per Seconds
KBRM	Knowledge-Based Risk Management
KCCO	Kansas City Commodity Office
KD	Knocked Down
KDEM	1) Kansas Department of Emergency Management
	2) Kentucky Department of Emergency Management
KDP	Key Decision Point
kg	kilogram
kHz	kiloHertz
km	kilometer
kN	kilo-Newton
KSA	Knowledge, Skills, and Abilities
KT	Kiloton
kV	kilovolt
KVERT	Kamchatkan Volcanic Eruptions Response Team
kW	Kilowatt(s)
kWh	kilowatt hour
L	Locality
LA	Legislative Affairs (see OLA)
LAC	Local Assistance Center(s)
LAG	Lowest Adjacent Ground [grade]
LAN	Local Area Network
LANDSAT	Land Satellite
LANL	Los Alamos National Laboratory
LAN/WAN	Local Area Network/Wide Area Network
LAO	Lead Agency Official
LAW	Light Antitank Weapon
lb	pound
LBAD	Lexington Blue Grass Army Depot
lbf	pound force
L-CAR	Local Capability Assessment for Readiness
LCAT	Logistics Closeout Assistance Team
LCCE	Life Cycle Cost Estimate
LCM	Life Cycle Management
LCO	Limiting Condition for Operation
LCT	Liaison Coordination Team
LD	Lethal Dose
LDR	Lutheran Disaster Response
LDS	Lightning Detection System
LDW	Last Day Worked
LE	Law Enforcement
LEA	1) Law Enforcement Agency
	2) Light Enforcement Aircraft
LEADERS	Lightweight Epidemiology Advanced Detection and Emergency Response System
LEC	Local Exchange Carrier
LeeTran	Lee County Transit Authority (Florida)
LEGAT	Legal Attache
LEH	Light Enforcement Helicopter
LEL	1) Lower Explosive Limit
	2) Lowest Effect Level
LEM	Local Emergency Management
LEMA	Local Emergency Management Authority
LEOC	Local Emergency Operations Center
LEP	1) Leadership Excellence Program
	2) Limited English Proficiency
LEPC	Local Emergency Planning Committee
LEPPC	Local Emergency Prevention and Preparedness Council
LERN	Law Enforcement Radio Net
LERT	Logistics Emergency Response Team
LESC	Law Enforcement Support Center
LESO	Law Enforcement Security Officer
LETPP	Law Enforcement Terrorism Prevention Program 
LETS	Law Enforcement Telecommunications System
LEU	Low-Enriched Uranium
LEVEL 1 EST	Full EST activation level (NRCC) 
LEVEL 2 EST	Intermediate EST activation level (NRCC)
LEVEL 3 EST	Minimal EST activation level (NRCC)
LEWG	Law Enforcement Working Group
LF	1) Linear Foot
	2) Low Frequency
LFA	Lead Federal Agency
LFD	Letter of Final Determination
LFE	Lowest Floor Elevation
LFEOC	Local Federal Emergency Operations Center
LFFE	Lowest Finished Flood Elevation
LFO	Lead Federal Official
LFP	Livestock Feed Programs
LH	Local Hire
LHA/LHD	Landing Helicopter - Assault/ Landing Helicopter - Deck
LHD	Local Health Department
LHMC	Local Hazard Mitigation Coordinator
LHR	Limited Home Repair
LHW	Last Hour Worked
LIBSYS	Library System
LID	Low-Impact Development
LIDAR	Light Detection and Ranging (system)
LIDEF	Levee Inventory Data Entry Form
LIFE	Legal Immigration Family Equity
LIHEAP	Low Income Household Energy Assistance Program
LIMFAC	Limiting Factor
LIMS	1) Laboratory Information Management System
	2) Logistics Information Management System
LISS	Linear Imaging and Self-Scanning
LLEA	Local Law Enforcement Agency
LLNL	Lawrence Livermore National Laboratory
LLP	Limited Liability Partnership
LLW	Low-Level Waste
LLWS	Low-Level Wind Shear
LM	Logistics Management
LMDC	Lower Manhattan Development Corporation
LMF	Logistics Management Facility
LMFBR	Liquid Metal Fast Breeder Reactor
LMR	Living Marine Resource
LNG	Liquefied Natural Gas
LNO	Liaison Officer
LOA	Letter of Agreement
LOAEL	Lowest Observed Adverse Effect Level
LOC	1) Letter of Credit
	2) Library of Congress
	3) Line of Communication 
LOCA	Loss-Of-Coolant Accident
LOC-TFCS	Letter of Credit - Treasury Financial Communications System
LODR	Letter of Determination Review
LOEP	Louisiana Office of Emergency Preparedness
LOG	Logistics
LOI	1) Letter of Intent
	2) Letter of Instruction
LOMA	Letter of Map Amendment
LOMC	Letter of Map Change
LOMC-VALID	Letter of Map Change Revalidation
LOMR	Letter of Map Revision
LOMR-F	Letter of Map Revision Based on Fill
LOS	Line-of-Sight
LOSA	Logistical Operations Staging Area
LOSSEST	Loss Estimation
LOU	Limited Official Use
LPDP	Livestock Preservation Donation Program
LPG	Liquefied Petroleum Gas
LPN	Licensed Practical Nurse
LPOC	Last Port of Call
LPPC	Local Preparedness and Prevention Council
LPR	Lawful Permanent Resident
LPZ	Low Population Zone
LR	Limited Response
LR-BSDS	Long Range Biological Standoff Detection System
LRC	1) Learning Resource Center
	2) Logistics Readiness Center
LRFD	Load and Resistance Factor Design
LRIP	Low Rate Initial Production
LRMP	Long Range Management Plan
LRN	Laboratory Response Network
LRU	Lowest Replaceable Unit
LS	1) Logistics Support
	2) Lump Sum
LSC	1) Legal Services Corporation
	2) Life Support Center
LSCAD	Lightweight Standoff Chemical Agent Detector
LSG	Large Scale Game(s)
LSS	1) Laboratory Scientific Services
	2) Life Support System
LSV	Logistical Staging Vehicle
LT or Lt or Lieut	Lieutenant
LTATP	Land Transportation Anti-terrorism Training Program
LTD	Limited
LTL	Less-than Truckload
LTR	Long Term Recovery
LULC	Land Use and Land Cover
LWF	Lutheran World Federation
LWOP	Leave Without Pay
LWR	Light-Water Reactor
LYNX	Central Florida Regional Transportation Authority
LZ	Landing Zone
MA	1) Marshalling Area
	2) Mission Assignment
MAA	Mutual Aid Agreement
MAAD	Mobile Asset Activities Document
MAC	1) Mapping & Analysis Center
	2) Mission Assignment Coordinator
	3) Monitoring and Analysis Coordinator
	4) Multi-Agency Command
	5) Multiple award contract
MACA	Military Assistance to Civil Authorities
MACC	1) Multi-Agency Coordination Center
	2) Multi Agency Crime Center
MACDIS	Military Assistance for Civil Disturbances
MACGp	Multi-Agency Coordination Group
MACOM	Major Command
MACS	Multi-Agency Coordination System
MAEC	Mid-America Earthquake Center
MAELU	Mutual Atomic Energy Liability Underwriters
MAF	Master Appropriation File
MAFFS	Modular Airborne Fire Fighting System
MAGIC	Mid-America GIS Council
MALE	Medium Altitude Long Endurance (see also HALE)
MANPADS	Man-Portable Air Defense Systems
MAR	Monthly Accomplishments Report
MARAC	Mutual Aid Regional Advisory Committee
MARAD	Maritime Administration
MARC	Maryland Rail Commuter
MAREP	Marine Report
MARR	Mission Assignment Reimbursement Request
MARS	1) Military Affiliated Radio System
	2) Mobile Analytical Response System
	3) Multifunction Acquisition and Reporting System
MARSA	Military Assumes Responsibility for Separation of Aircraft
MARSEC	Maritime Security
MarshMALLOW	Marsh Management Activities for Learning the Lifestyles of Wildlife
MART	Morning Advisory Risk Threat  (see also DART and EART)
MAS	Mapping Activity Statement
MASF	Mobile Aeromedical Staging Facility
MASH	Mobile Army Surgical Hospital
MASINT	Measurement and Signature Intelligence
MAST	Military Assistance to Safety and Traffic
MAT	Mobilization Assistance Team
MATES	Mobilization and Training Equipment Site
MATRIX	Multistate Anti-Terrorism Information Exchange
MATTS	Mobile Air Transportable Telecommunications System
mb	Millibar
MB	Megabyte
MBA	1) Master of Business Administration
	2) Mortgage Bankers Association
MBO	Management by Objectives
MBPS	Megabytes Per Second
MBTA	Migratory Bird Treaty Act
MC	1) Marine Corps
	2) Master of Ceremonies
	3) Member of Congress
	4) Mobilization Center
MCA	Multichannel Analyzer
MCC	1) Major Cities [police] Chiefs
	2) Master Control Cell
	3) Mobility Control Center
	4) Movement Coordination Center
	5) Mission Control Center
MCD	Medical Crew Director
MCE	Maximum Credible Event
MCEER	Multidisciplinary Center for Earthquake Engineering Research
MCF	1) Mass Care and Feeding
	2) Movement Coordination Function
MCI	Mass Casualty Incident
MCMC	Mid-Continent Mapping Center
MCMT	Mobilization Center Management Team
MCO	MERS Coordination Office
MCOC	Marine Corps Operations Center
MCR	Military Communications Representative
MCS	Movement Coordination System
MCSAP	Motor Carrier Safety and Assistance Program
MCU	Movement Coordination Unit
MCV	Mobile Coordinating Vehicle
MD	1) Management Directive
	2) Medical Doctor
MDA	Maritime Domain Awareness
MDD	Metal Detection Device
MDF	Medical, Dental, and Funeral
MDRO	Mission Disaster Relief Officer
MDS	Mennonite Disaster Service
MDST	Mountain Daylight Savings Time (see MDT)
MDT	Mountain Daylight Time (GMT - 6)
ME	Medical Examiner
MEA	1) Major Emergency Action
	2) Multi-Role Enforcement Aircraft
MEAG	Major Emergency Action Guide
MEAP	Mobile Environmental Analytical Platform
MEDEVAC	Medical Evacuation
MEL	Mobile-Erector Launcher
MEMA	1) Maine Emergency Management Agency
	2) Maryland Emergency Management Agency
	3) Massachusetts Emergency Management Agency
	4) Mississippi Emergency Management Agency
	5) Missouri Emergency Management Agency
	6) Motor & Equipment Manufacturers Association
MEOW	Maximum Envelope of Water (or Winds)
MEP	Management Engineering Plan
MEPI	Middle East Partnership Initiative
MERRT	Medical Emergency Radiological Response Team
MERS	Mobile Emergency Response Support/System
MERSA	Mobile Emergency Response Support Assets
MET	Meteorologist (or Meteorological)
METAR	Meteorological Aviation Report
METL	Mission-Essential Task List
METOC	Meteorological and Oceanographic
METSAT	Meteorological Satellite
meV	Millielectronvolt
MeV	Megaelectronvolt
MFAS	Marriage Fraud Amendment System
mg	milligram
MG	Marsh Vegetation (Line)
MG/M3	Milligrams per Cubic Meter.
MG-MIN/M3	Milligram Minutes per Cubic Meter.
MGMT	Management
MH	1) Manufactured Housing
	2) Mental Health
	3) Mobile Home
MHC	Mobile Health Clinic
MHE	Materiel Handling Equipment
MHS	Message Handling System
MHTGR	Modular High Temperature Gas Reactor
MHW	Mean High Water
MHWL	Mean High Water Line
MHz	Megahertz
MIACC	Major Industrial Accidents Council of Canada
MIC	1) Media Information Center
	2) Meteorologist in Charge
MICS	Monitoring Information on Contracted Studies (System)
MIDAS	Microfluidic Integrated DNA Analysis System
M&IE	Miscellaneous and Incidental Expenses
MIEP	Mass Immigration Emergency Plan
MIFC	Maritime Intelligence Fusion Center
MIN	Mobile Identification Number
MINICAM	Miniature Chemical Agent Monitor
MIPR	Military Interdepartmental Purchase Request
MIPT	Memorial Institute for the Prevention of Terrorism
MIRV	Multiple Independent Re-Entry Vehicle
MIS	Management Information System
MIT	Mitigation
MKT	Mobile Kitchen Trailer
MLAT	Mutual Legal Assistance Treaty
MLD	Median Lethal Dose
MLH	Medium Lift Helicopter
MLOS	Microwave Line-of-Sight
MLW	Mean Low Water
MMC	Main Media Center
MMCE	Medical Management of Chemical Exposure
MMI	Modified Mercalli Intensity
MMIS	Municipal Management Information System
MMPA	Marine Mammal Protection Act
MMPAC	Merchant Marine Personnel Advisory Committee
MMRS	Metropolitan Medical Response System
MMS	Minerals Management Service
MMST	Metropolitan Medical Strike Team
MMWR	Morbidity and Mortality Weekly Report
MNAP	Mapping Needs Assessment Process
MNUSS	Map Needs Update Support System
MO	1) Medical Officer
	2) Method of operation
MOA	Memorandum of Agreement
MOB	1) Mobilization (or Mobilize)
	2) Main Operating Base
MOB Center	Mobilization Center
MOC	Mobile Operations Center
MODEM	Modulator/Demodulator
MOM	1) Maximum of Maximums
	2) Middle of Month
MOOTW	Military Operations Other Than War
MOPP	Mission-Oriented Protective Posture
MOU	Memorandum of Understanding
MOX	Mixed-Oxide Fuels
MP	1) Management Profiler
	2) Military Police
MPA	Maritime Patrol Aircraft
MPC	1) Main Press Center
	2) Maximum Permissible Concentration 
	3) Midterm Planning Committee
MPD	Maximum Potential Destruction
MPE	Maximum Permissible Exposure
MPEG	Motion Picture Expert Group
MPH	Miles Per Hour
MPPP	Mortgage Portfolio Protection Program
MPS	Mission Planning System
MPU	1) Microprocessor Unit
	2) Mobile Power Unit
mR	milliroentgen/millirem
MR	1) Medical Records
	2) Medical Response
MRA	Mortgage and Rental Assistance
MRC	1) Management Review Council
	2) Medical Reserve Corps 
MRE	Meal, Ready-to-Eat
mRem	millirem
MRF	Medium Range Forecast
mR/h	milliRoentgen per hour
MRI	Mean Recurrence Interval
MRIC	Mobile Reconstruction Information Center
MRMC	Medical Research and Materiel Command
MRP	1) Machine readable passport
	2) Minimal Repair Program
MRR	Measurement Residual Ratio
MRRS	MERS Response Reporting System
MRT	Medical Response Team
MRV	1) Mobile Response Van (or Vehicle)
	2) Multi-Radio Van (or Vehicle)
M/S	Meters per second
MS	MicroSoft
MS-1	Medical Service - 1 (Hospital)
MSA	1) Mutual Support Agreement
	2) Metropolitan Statistical Area
MSC	1) Marine Safety Center
	2) Map Service Center
	3) Major Subordinate Command
	4) Mobile Switching Center
MSCA	Military Support to Civil Authorities (see DSCA)
MSCLEA	Military Support to Civilian Law Enforcement Agencies
MSDS	Material Safety Data Sheet
MSE	MERS Support Element
MSEL	Master Scenario Events List
MSF	Mobile Screening Force
MSFCMA	Magnuson-Stevens Fisheries Conservation and Management Act
MSHA	Mine Safety and Health Administration
MSIC	Missile & Space Intelligence Center
MSIS	Marine Safety Information System
MSL	Mean Sea Level
MSLO	Military Support Liaison Officer
MSO	Military Support Officer
MSPB	Merit Systems Protection Board
MSR	Main Supply Route
MSRC	Marine Spill Response Corporation
MSST	Maritime Safety and Security Team
MST	1) Management Support Team
	2) METRO Strike Team
	3) Mountain Standard Time (GMT - 7)
MSU	1) Management Support Unit
	2) Medical Support Unit
MT	1) Megaton
	2) metric ton
MTA	Material Transfer Area
MTF	Medical Treatment Facility
MTMC	Military Traffic Management Command
MTOE	Modified Table of Organization and Equipment
MTR	Military Training Route
MTSA	Maritime Transportation Security Act
MTSP	Mass Transit Security Program
MUDAC	Meteorological and Unified Dose Assessment Center
MUF	Materials Unaccounted For
M/V	Merchant Vessel
MVGP	Mission, Vision, and Guiding Principles
MW	1) megawatt
	2) Microwave
	3) Mt Weather
MWA	Metropolitan Washington Area
MWCOG	Metropolitan Washington Council of Governments
MWEAC	Mt Weather Emergency Assistance Center
MWEOC	Mt Weather Emergency Operations Center
MWFRS	Main Wind Force Resisting System
MWH	megawatt hour
MWS	Marine Weather Statement
M-ZONE	High Mudflow Hazard Area
N/A	1) Not Affected
	2) Not (or Non) Applicable
NA	1) North American
	2) Northeastern Area
NAAE	National Association of Agricultural Employees
NAAK	Nerve Agent Antidote Kit
NAAP	Newport Army Ammunition Plant (obsolete)
NAAQS	National Ambient Air Quality Standards
NAAT	North American Aviation Trilateral
NAC	1) National Advisory Committee
	2) National Agency Check
	3) Nebraska Avenue Center/Complex
NACA	National Air Carrier Association
NAC/AEGL	National Advisory Committee on Acute Exposure Guidelines Levels (for Chemical Substances)
NACCHO	National Association of County and City Health Officials
NACD	National Association of Corporate Directors
NACE	National Association of County Engineers
NACI	National Agency Check with Inquiries
NACo	National Association of Counties
NACS	NEMIS Access Control System
NAD27	North American Datum of 1927
NAD83	North American Datum of 1983
NADO	National Association of Development Organizations
NAERG	North American Emergency Response Guidebook
NAFAX	National Facsimile Network
NAFSMA	National Association of Flood & Stormwater Management Agencies
NAFTA	North America Free Trade Agreement
NAHB	National Association of Home Builders
NAI	North American Initiative
NaI(Tl)	Sodium Iodide Doped with Thallium (scintillator)
NAII	National Association of Independent Insurers
NAIIA	National Association of Independent Insurance Adjusters
NAILS	National Automated Immigration Lookout System
NAMRI	Naval Medical Research Institute
NAOC	National Airborne Operations Center
NAOS	North American Atmospheric Observing System
NAP	Nuclear Assessment Program
NAPA	National Academy of Public Administration
NAPI	National Arson Prevention Initiative
NARA	National Archives and Records Administration
NARAC	National Atmospheric Release Advisory Center)
NARCL	Nuclear Accident Response Capabilities Listing
NARP	Nuclear Accident Response Plan (or Procedures)
NARS	National Archives and Records Service
NARSAP	National Advanced Remote Sensing Applications Program
NARTC	National Advanced Resource Technology Center
NAS	National Academy of Sciences
NASA	National Aeronautics and Space Administration
NASAR	National Association for Search and Rescue
NASCDD	National Association of State Civil Defense Directors
NASEMSD	National Association of State Emergency Medical Services Directors
NASFM	National Association of State Fire Marshals
NASNA	National Association of 9-1-1 Administrators
NASTTPO	National Association of State Title Three Program Officials
NASULGC	National Association of State Universities and Land-Grant Colleges
NATCA	National Air Traffic Controllers Association
NATO	North Atlantic Treaty Organization
NAVAID	Navigational Aid
NAVD88	North American Vertical Datum of 1988
NAWAS	1) National Alert and Warning System
	2) National Warning System
NAWAS/BCC	National Warning System Bridge and Conference Controller
NAWE	National Association for Waterfront Employees
NBACC	National Biosecurity Analysis and Countermeasures Center
NBC	Nuclear, Biological, and Chemical
NBFAC	National Bioforensic Analysis Center
NBSAC	National Boating Safety Advisory Council
NBTA	National Business Travel Association
NBWDA	National BioWeapons Defense Analysis Center
NCA	National Command Authority
NCAI	National Congress of American Indians
NCAR	National Center for Atmospheric Research
NCAS	National Cyber Alert System
NC&B	Nuclear, Chemical and Biological
NCBFAA	National Customs Brokers and Forwarders Association of America
NCC	National Coordinating Center (for Telecommunications)
NCCC	National Council of the Churches of Christ
NCCG	National Civilian Community Group
NCDDM	National Center for Disaster Decision Making
NCEH	National Center for Environmental Health
NCEP	National Centers for Environmental Prediction
NCGIA	National Center for Geographic Information and Analysis
NCIC	National Crime Information Center
NCID	National Center for Infectious Diseases
NCIT	National Council on International Trade
NCLIS	National Commission on Libraries and Information Science
NCMEC	National Center for Missing and Exploited Children
NCO	Non-Commissioned Officer
NCP	National Oil and Hazardous Substances Pollution Contingency Plan (aka National Contingency Plan)
NCPC	1) National Capitol Planning Commission
	2) National Crime Prevention Council
NCPI	National Committee on Property Insurance
NCR	National Capital Region
NCRC	National Capitol Region Coordination
NCRPM	National Council on Radiation Protection and Measurements
NCS	1) National Communications System [ESF-2]
	2) Net Control System
NCSA	National Center for Supercomputing Applications
NCSD	National Cyber Security Division
NCSL	National Council of State Legislators
NCSLLET	National Center for State & Local Law Enforcement Training, Advisory Committee to the
NCSP	National Communications Support Plan
NCSRM	National Communications Systems Regional Manager
NCSSA	National Cartographic Standards for Spatial Accuracy
NCTC	National Counterterrorism Center
NCUA	National Credit Union Administration
NCVIP	National Child Victim Identification Program
NDA	1) National Defense Area
	2) Non-Disclosure Agreement
NDAA	Natural Disaster Assistance Act
NDAC	Network Design and Analysis Center
NDC	National Data Center
NDEA	National Defense Emergency Authorization
NDEC	National Disaster Education Coalition
NDEP	National Digital Elevation Program
NDER	National Defense Executive Reserve
NDIA	National Defense Industry Association
NDIC	National Drug Intelligence Center
NDMC	National Drought Mitigation Center
NDMOC	National Disaster Medical Operations Center
NDMS	National Disaster Medical System
NDMSOSC	National Disaster Medical System Operations Support Center
NDPO	National Domestic Preparedness Office
NDRSMP	National Distress and Response System Modernization Project (also known as "Rescue 21")
NDS	1) National Defense Stockpile
	2) Nuclear Detection System
NDW	Naval District of Washington
NE	1) Northeast
	2) New England
NEC	National Earthquake Center
NECA	Newport Chemical Activity
NECC	National Emergency Coordination Center (obsolete; see NRCC)
NECD	Newport Chemical Depot
NECN	National Emergency Communications Network
NEDSS	National Electronic Disease Surveillance System
NEEP	National Earthquake Education Program
NEET	National Exercise Evaluation Team
NEFSMA	New England Floodplain and Stormwater Managers Association
NEG	National Emergency Grant
NEHA	National Environmental Health Association
NEHRP	National Earthquake Hazards Reduction Program
NEI	Nuclear Energy Institute
NEIC	National Earthquake Information Center
NEIS	National Earthquake Information Service
NEMA	1) National Emergency Management Association
	2) Nebraska Emergency Management Agency
NEMB-CAP	National Emergency Management Baseline -Capability Assessment Program
NEMIS	National Emergency Management Information System
NEMT	National Emergency Management Team
NENA	National Emergency Number Association
NEO	1) Near-Earth Orbit
	2) Noncombatant Evacuation Operation
NEOB	New Executive Office Building
NEOC	National Emergency Operations Center
NEPA	National Environmental Protection Act
NEPPC	National Emergency Prevention and Preparedness Council
NERC	North American Electric Reliability Council
NERT	National Emergency Response Team
NESEC	Northeast States Emergency Consortium
NESN	Necessary Expenses and Serious Needs
NESP	National Environmental Studies Project
NEST	Nuclear Emergency Search/Support Team
NET	No Earlier Than
NETAC	National Environmental Technology Application Center
NETAP	National Earthquake Technical Assistance Program
NETC	National Emergency Training Center
NEXRAD	Next Generation Weather Radar
NEXS	National Exercise Schedule
NEXUS	Next Generation Upper Weather System
NFA	National Fire Academy
NFAR	No Further Action Required
NFCD	National Finance Center Database
NFDA	1) National Flood Determination Association
	2) National Funeral Directors Association
NFDC	National Fire Data Center
NFES	National Fire Equipment System
NFFE	National Federation of Federal Employees
NFFF	National Fallen Firefighters Foundation
NFFS	Northeast Forest Fire Supervisors
NFI	National Flood Insurance
NFIB	National Foreign Intelligence Board
NFIC	National Fire Information Council
NFIF	National Flood Insurance Fund
NFIP	1) National Flood Insurance Program
	2) National Foreign Intelligence Program
NFIRA	National Flood Insurance Reform Act of 1994
NFIRS	National Fire Incident Reporting System
NFMA	National Forest Management Act
NFP	Not-For-Profit
NFPA	National Fire Protection Association
NFPCA	National Fire Prevention and Control Administration
NFPE	National Fire Protection Equipment
NFR	Notice of Finding and Recommendation 
NFS	National Forest System
NFSC	Narcotics Financing Strategy Center
NFSCC	National Fire Science Curriculum Committee 
NFSLO	National Fire Suppression Liaison Officer
NG	National Guard
NGA	1) National Geospatial-Intelligence Agency
	2) National Governor's Association
NGB	1) National Governing Body
	2) National Guard Bureau
NGDC	National Geophysical Data Center
NGLO	National Guard Liaison Officer
NGM	Nested Grid Model
NGO	Non-Governmental Organization
NGRS	National Geodetic Reference System
NGS	National Geodetic Survey
NGVD	National Geodetic Vertical Datum
NGVD29	National Geodetic Vertical Datum of 1929
NHC	National Hurricane Center
NHPA	National Historic Preservation Act
NHTSA	National Highway Transportation Safety Administration
NHV	Natural Hazard Vulnerability
NI	No Insurance
NIAC	1) NASA Institute for Advanced Concepts
	2) National Infrastructure Advisory Council
	3) National Iranian American Council
NIBERS	National Incident Based Reporting System
NIBS	National Institute of Building Sciences
NIC	1) National Instrumentation Center
	2) NIMS Integration Center
NICC	National Interagency Coordination Center
NICCP	National Interdiction Command & Control Plan
NICI	National Interagency Counterdrug Institute
NID	1) National Intelligence Director
	2) National Inventory of Dams
NIDF	National Insurance Development Fund
NIEHS	National Institute of Environmental Health Services
NIEOC	National Interagency Emergency Operations Center
NIER	National Industrial Equipment Reserve
NIF	1) National Ignition Facility
	2) Non-Industrial Facility
NIFC	National Interagency Fire Center
NIFCC	National Interagency Fire Coordination Center
NIH	National Institutes of Health
NII	1) National Information Infrastructure
	2) Non-Intrusive Inspection
NIIMS	National Interagency Incident Management System
NIIS	Non-Immigrant Information System
NIJ	National Institute of Justice
NIMA	National Imagery and Mapping Agency (see NGA)
NIMBY	Not In My Backyard
NIMCAST	National Incident Management Compliance Assurance Tool
NIMG	National Interagency Mobilization Guide
NIMH	National Institutes of Mental Health
NIMS	National Incident Management System
NIMS/NET	National Incident Management System Network
NIMTO	Not In My Term of Office
NIOSH	National Institute for Occupational Safety and Health
NIP	National Immunization Program
NIPC	National Infrastructure Protection Center
NIPF	National Intelligence Priority Framework
NIPP	National Infrastructure Protection Plan
NIRSC	National Interagency Radio Support Cache
NIRT	Nuclear Incident Response Team
NISAC	National Infrastructure Simulation and Analysis Center
NISE	National Intelligence Support Element
NIST	National Institute of Standards and Technology 
NIUSR	National Institute for Urban Search and Rescue
NJTTF	National Joint Terrorism Task Force
NLC	1) National League of Cities
	2) National Location Code
NLD	Nunn-Lugar-Domenici
NLECC	National Law Enforcement Coordination Center
NLETS	National Law Enforcement Telecommunications System
NLRA	National Labor Relations Authority
NLRB	National Labor Relations Board
NLS	National Language Standards
NLT	No Later Than
NM	Nautical Mile
NMAB	National Materials Advisory Board
NMAS	National Map Accuracy Standard
NMB	National Mediation Board
NMC	1) National Meteorological Center
	2) Non-Mission Capable
NMCC	National Military Command Center
NMFS	National Marine Fisheries Service
NMI	No Middle Initial
NMIC	National Maritime Intelligence Center
NMJIC	National Military Joint Intelligence Center
NMRI	Naval Medical Research Institute
NMRS	National Medical Response System
NMRT	National Medical Response Team
NMSAC	National Maritime Security Advisory Committee
NMSP	National Maritime Security Plan
NMSS	Nuclear Materials Safeguards and Security
NNEC	National Network Emergency Center
NNOB	National Network Operations Branch
NNOC	National Network Operations Center
NNSA	National Nuclear Security Administration
NO	National Office
NOAA	National Oceanic and Atmospheric Administration
NOAEL	No Observed Adverse Effects Level
NOBLE	National Organization of Black Law Enforcement Executives
NOC	1) National Olympic Committee
	2) National Operations Center
	3) Navy Operations Center
	4) Negotiations Operations Center
	5) Network Operations Center
NOEL	No Observed Effects Level
NOFA	Notice of Funds Availability
NOGA	Notice of Grant Award
NOI	1) Notice of Intent
	2) Notice of Interest
NOK	Next-of-Kin
NOPR	Notice of Proposed Rulemaking
NORAD	North American Aerospace Defense Command
NORTHCOM	(United States) Northern Command
NOS	1) National Ocean Survey
	2) Not Otherwise Specified
NOSAC	National Offshore Safety Advisory Committee
NOTAM	Notice To Airmen
NOUE	Notice of Unusual Event
N/P	Not Provided
NP	1) National Preparedness
	2) Navigation Processor
NPC	1) National Paralympic Committee
	2) National Petroleum Council
NPDES	National Pollutant Discharge Elimination System
NPDP	National Performance of Dams Program
NPFC	National Pollution Funds Center
NPL	National Priorities List
NPLA	National Preparedness Leadership Academy
NPMA	National Property Management Association
NPMOC	Naval Pacific Meteorology and Oceanography Center
NPOC	Next Port of Call
NPOESS	National Polar-Orbiting Operational Environmental Satellite System
NPP	Nuclear Power Plant
NPPC	National Preparedness and Prevention Council
NPR	National Partnership for Reinventing Government (formerly National Performance Review)
NPRM	Notice of Proposed Rulemaking
NPS	National Park Service
NPSC	National Processing Service Centers
NPSP	National Pharmaceutical Stockpile Program
NPSTC	National Public Safety Telecommunications Council
NRAT	1) National Radiological Advisory Team
	2) Nuclear Radiological Advisory Team
NRC	1) National Records Center
	2) National Research Council
	3) National Response Center
	4) [United States] Nuclear Regulatory Commission
NRCC	1) National Response Coordination Center
	2) Northern Regional Coordination Center
NRCOC	Nuclear Regulatory Commission Operations Center
NRCS	Natural Resources Conservation Service
NRCSDC	Natural Resources Conservation Service District Conservationist
NRCSSC	Natural Resources Conservation Service State Conservationist
NRIMC	National Resources Information and Mapping Center
NRIS	National Resource Information System
NRO	National Reconnaissance Office
NRP	National Response Plan
NRPC	National Railway Passenger Commission
NRS	National Response System
NRT	1) National Response Team
	2) Near Real-Time
NSA	1) National Security Agency
	2) National Security Area
	3) National Sheriff's Association
	4) Network Security Agreement
NSAC	Navigation Safety Advisory Council
NSC	1) National Safety Council
	2) National Security Council
	3) National Security Cutter
	4) NFIRS Support Center
NSD	1) Named Storm Day
	2) National Security Directive
NSDD	National Security Decision Directive
NSDI	National Spatial Data Infrastructure
NSEC	National Security Emergency Coordination
NSEERS	National Security Entry Exit Registration System
NS/EP	National Security and Emergency Preparedness
NS/EPC	National Security and Emergency Preparedness Communications, Committee for
NSF	1) National Science Foundation
	2) National Strike Force
NSFCC	National Strike Force Coordination Center
NSGIC	National States Geographic Information Council
NSHS	National Strategy for Homeland Security
NSI	1) National Security Information
	2) Nuclear Surety Inspection
NSLRSDA	National Satellite Land Remote Sensing Data Archive
NSMP	National Strong-Motion Program
NSN	National Stock Number
NSPD	National Security Presidential Directive
NSPE	National Society of Professional Engineers
NSRS	National Spatial Reference System
NSS	National Security Strategy
NSSA	National Safe Skies Alliance
NSSDA	National Standard for Spatial Data Accuracy
NSSE	National Special Security Event
NSSFC	National Severe Storms Forecast Center
NSSL	National Severe Storms Laboratory
NSTAC	National Security Telecommunications Advisory Committee
NSTC	National Science & Technology Council
NSTR	Nothing Significant to Report
NTA	1) National Technology Alliance (research partnership between government, academia and industry)
	2) Notice to Appear
NTAC	National Threat Assessment Center
NTC	1) National Targeting Center
	2) National Teleregistration Center
NTC-MW	National Teleregistration Center at Mount Weather
NTE	Not To Exceed
NTEU	National Treasury Employees Union
NTIA	National Telecommunications and Information Administration
NTIS	National Technical Information Service
NTM	National Technical Means
NTMR	National Technical Means of Reconnaissance
NTMS	National Telecommunications Management Structure
NTR	Nothing To Report
N-TRAP	National Terrorism Response Awareness Program
NTRO	National Terrorism Response Objective
NTS	1) National Traffic System
	2) Nevada Test Site
NTSB	National Transportation Safety Board
NTSC	National Telecommunications Standards Committee
NTSP	National Telecommunications Support Plan; a.k.a. National Plan for Telecommunications Support in Non-Wartime Emergencies
NU	Name Unknown
NUCFLASH	Accidental, unauthorized, or unexplained nuclear detonation
NUDET	Nuclear Detonation
NUL	National Urban League
NUMARC	Nuclear Management and Resources Council
NUREG	Nuclear Regulation
NUSRS	National Urban Search and Rescue System, Advisory Committee of the
NVDC	National Vessel Documentation Center
NVFC	National Volunteer Fire Council
NVLAP	National Voluntary Laboratory Accreditation Program
NVMC	National Vessel Movement Center
NVOAD	National Voluntary Organization Active in Disasters
NVTSA	Night Vision Technology Safety Act
NW	Neighborhood Watch 
NWC	National Warning Center
NWCG	National Wildfire Coordinating Group
NWP	Neighborhood Watch Program (see NW)
NWR	National Weather Radio
NWS	National Weather Service
NWSFO	National Weather Service Forecast Office
NWWS	National Weather Wire Service
NYCOEM	New York City Office of Emergency Management
OA	1) Office Automation
	2) Over and Above
OAA	Older Americans Act
OADR	Originating Agency Determination Required
OAFME	Office of the Armed Forces Medical Examiner
OAO	Office of Aviation Operations
OAR	1) Office of Air and Radiation
	2) Office of Oceanic and Atmospheric Research
OAS	1) Office of Administrative Support
	2) Office of Aircraft Services
	3) Organization of American States
OASH/OEP	Office of the Assistant Secretary for Health / Office of Emergency Preparedness
OAWG	Organizational Attack Working Group
OB	Official Business
OBE	Overcome by Events
OBS	Observation(s)
OC	Operations Center
OCA	1) Office of Congressional Affairs
	2) Original Classification Authority
OCC	Office of the Comptroller of the Currency
OCD	Office of Community Development
OCDETF	Organized Crime Drug Enforcement Task Force
OCGFC	Office of Cerro Grande Fire Claims
OCHAMPUS	Office of Civilian Health and Medical Program of the Uniformed Services
OCIO	Office of the Chief Information Officer
OCIPEP	Office of Critical Infrastructure Protection and Emergency Preparedness
OCLUS	Outside the Continental Limits of the United States
OCN	Optimal Climate Normals
OCOG	Organizing Committee for the Olympic Games
OCONUS	Outside the Continental United States
OCPM	Office of Crisis Planning and Management
OCR	1) Office of Collateral Responsibility
	2) Optical Character Reader
OCRWM	Office of Civilian Radioactive Waste Management
OCS	1) Officer Candidate School
	2) Outer Continental Shelf
OCTEL	Operations Center Telephone
OCZM	Office of Coastal Zone Management
ODAM	Offsite Dose Assessment Manual
ODBC	Open Database Connectivity
ODC	Other Direct Cost
ODCEM	Oklahoma Department of Civil Emergency Management
ODEM	Oklahoma Department of Emergency Management
ODP	Office for Domestic Preparedness
ODRO	Office of Detention and Removal Operations
ODS	Operation Desert Safeguard
OE	1) Operational Environment
	2) Operating Expenses
	3) Organizational Elements
OECD	Organization for Economic Cooperation & Development
OEM	Office of Emergency Management
OEMA	Ohio Emergency Management Agency
OEMP	Office of Emergency Medical Preparedness
OEP	1) Occupant Emergency Plan
	2) Office of Emergency Preparedness
OER	Office of Emergency Response
OES	Office of Emergency Services
OET	Office of Emergency Transportation (DOT)
OF	1) Office of Finance
	2) Over-water Fetch (Line)
OFA	1) Office of Family Assistance
	2) Other Federal Agency(ies)
OFAC	Office of Foreign Assets Control
OFDA	Office of Foreign Disaster Assistance
OFF	Offshore Forecast
OFM	Office of Financial Management
OFMA	Oklahoma Floodplain Management Association
OFO	Office of Field Operations
OFSEP	Office of Food Security and Emergency Preparedness
OGAT	Official Government Acceptance Test
OGC	Office of General Counsel
OGE	Office of Government Ethics
OHRM	Office of Human Resources Management
OHS	Office of Homeland Security (now HSC)
OI	Office of Investigations
OIA	Office of International Affairs
OIC	1) Office of Interoperability & Compatibility
	2) Officer in Charge
OIE	Office of International Enforcement
OIG	Office of the Inspector General
OIM	Office of Incident Management
OIWG	Operational Intelligence Working Group
OJCS	Office of the Joint Chiefs of Staff
OJP	Office of Justice Programs
OJT	On-the-Job Training
OLA	Office of Legislative Affairs
OLE	Object Linking and Embedding
O&M	Operations and Maintenance
OMB	Office of Management and Budget
OMNCS	Office of the Manager, National Communications System
OMS	Operations Management Systems
OMTPE	Office of Mission to Planet Earth
ONA	Other Needs Assistance
ONDCP	Office of National Drug Control Policy
ONP	Office of National Preparedness
ONRA	Office of National Risk Assessment
OPA	1) Office of Public Affairs
	2) Oil Pollution Act
	3) Otherwise Protected Area
OPAC	On-Line Payments and Collection
OPC	Organizational Program Coordinators
OPCOM	Operational Command
OPCON	Operational Control
OPDAT	Overseas Prosecutorial Development, Assistance and Training
OPERIOD	Operational Period
OPHS	Office of Public Health and Science
OPLAN	Operations Plan
OPM	Office of Personnel Management
OPPRED	Operation Predator
OPR	Office of Primary Responsibility
OPREP	Operational Report
OPS	1) Office of Pipeline Safety
	2) Office of Private Sector Liaison (formerly PSL)
	3) Operational Planning System
	4) Operations
OPSEC	Operations/Operational Security
OPT	Operations and Planning Team
OPUS	Olympic Properties of the United States
OPW	Operational Planning Worksheet
ORCA	Operational Readiness Capability Assessment
ORD	1) Office of the Regional Director
	2) Operational Requirements Document
OREMS	Oak Ridge Evacuation Modeling System
ORIA	Office of Radiation and Indoor Air
ORISE	Oak Ridge Institute for Science and Education
ORM	Other Regulated Materials
ORNL	Oak Ridge National Laboratory
ORO	Offsite Response Organization
OR&R	Office of Regulations and Rulings
OS	1) Operating System
	2) Operations Support
OSC	1) On-Scene Coordinator (or Commander)
	2) Operation Safe Commerce
	3) Operations or Operational Support Center
OSCE	Organization for Security and Cooperation in Europe
OSD	1) Office of the Secretary of Defense
	2) Operations Support Division
	3) Operational Systems Document
OSDBU	Office of Small and Disadvantaged Business Utilization
OSHA	Occupational Safety and Health Administration
OSINT	Open-Source Intelligence
OSLGC&P	Office of State and Local Government Coordination and Preparedness
OSLTF	Oil Spill Liability Trust Fund
OSOCC	On-Site Operations Coordination Center
OST	1) Office of the Secretary for Transportation
	2) Operation Support Team
OSTC	On-Scene Tactical Commander
OSTP	Office of Science and Technology Policy
OTAN	Organisation du Trait de l'Atlantlique Nord (NATO)
OTAR	Over-The-Air Rekeying
OTBE	Overtaken by events
OTD	Office of Training & Development
OTE or OT&E	Operational Test and Evaluation
OTR	Office of Trade Relations
OTRS	Official Time Reporting System
OTS	Office of Thrift Supervision
OTSP	Office of Transportation Security Policy
OUC	Orlando Utilities Company
OVC	Office for Victims of Crime
OVI	Office of Volunteerism Initiatives
OVP	Office of the Vice President
OWMD	Office of Weapons of Mass Destruction
P&A	1) Price and Availability
	2) Planning and Assessment
PA	1) Principal Advisor
	2) Programmatic Agreement
	3) Public Address
	4) Public Affairs
	5) Public Assistance
PABX	Private Automatic Branch Exchange
PAC	1) Political Action Committee
	2) Primary Agency Committee
	3) Public Assistance Coordinator
PACAREA	Pacific Area
PACC	Patient Airlift Control Center
PACOM	U.S. Pacific Command
PAD	Protective Action Decision
PADC	Patch Authentication and Dissemination Capability.
PADRE	Protective Action Dosage Reduction Estimator
PA&E	Program Analysis and Evaluation
PAECE	Protective Action Evaluator for Chemical Emergencies
PAG	Protective Action Guide
PAH	Polynuclear Aromatic Hydrocarbons
PAHO	Pan American Health Organization 
PAM	Pamphlet
PA-NST	Public Affairs - National Support Team
PANYNJ	Port Authority of New York and New Jersey
PAO	1) Pacific Area Office
	2) Public Affairs Officer
	3) Public Assistance Officer
PA-PRT	Public Affairs - Planning Response Team
PAPR	Powered Air Purifying Respirator
PAR	1) Performance & Accountability Report
	2) Population at Risk
	3) Protective Action Recommendation
	4) Public Administration Review
PARADE	Prevention, Advocacy, Resources and Data Exchange
PARDOS	Partial Dosage
PART	Program Assessment Rating Tool (OMB)
PAs	Protective Actions
PASS	Partners Assuring Safer Schools
PAT	Process Action Team
PATRIOT	(see USA PATRIOT [Act])
PAX	Passengers
PAZ	Protective Action Zone
PBA	Pine Bluff Arsenal
PBCA	Pine Bluff Chemical Activity
PBD	Program Budget Decision 
PBDS	Prototype Biological Detection System
PBRB	Program Budget Review Board 
PBS	1) Public Building Service
	2) Public Broadcasting System
PBSIS	Public Building Service Information System
PBX	Phone (or Private) Bank Exchange
PC	Personal Computer
PCC	Policy Coordinating Committee
PCCIP	President's Commission on Critical Infrastructure Protection
PCE	Programmatic Categorical Exclusion
PCERT	Preliminary Computer Evidence Recovery Training
PCF	Patient Care Form
PCII	Protected Critical Infrastructure Information
PCIIMS	PCII Management System
PCIS	Partnership for Critical Infrastructure Security
PCPT	Pasco County Public Transportation (Florida)
PCR	polymerase chain reaction
PCS	1) Permanent Change of Station
	2) Personal Communications Service
PCT	1) Polk County Transit (Florida)
	2) Program Control Team
PCTARE	Personal Computer Time and Attendance Remote Entry
P&D	Production and Development
PD	1) Paid
	2) Per Diem
	3) Police Department
	4) Policy Directive
	5) Position Description
	6) Presidential Declaration
PDA	1) Personal Data Assistant
	2) Preliminary Damage Assessment
	3) Pueblo Depot Activity
PDASH	Principal Deputy Assistant Secretary for Health
PDC	1) Pacific Disaster Center
	2) Personnel Data Card
PDD	Presidential Decision Directive
PDF	1) Probability Density Function
	2) Portable Document Format
PDM	Pre-Disaster Mitigation (including Grant Program)
PDOP	Position Dilution of Precision
PDS	Personnel Decontamination Station
PDSI	Palmer Drought Severity Index
PDT	Pacific Daylight Time  (GMT - 7)
PE	Professional Engineer
PEA	Programmatic Environmental Assessment
PEAD	Presidential Emergency Action Document
PEDS	Portable Emergency Data System
PEF	Progress Energy Florida
PEG	1) Performance Evaluation Group
	2) Performance Evaluation Guide
PEL	Permissible Exposure Limit
PEMA	Pennsylvania Emergency Management Agency
PEO	Public Education and Outreach
PEOC	President's Emergency Operations Center
PEP	1) Prepositioned Equipment Program
	2) Primary Entry Point
	3) Professional Excellence Program
PEPAC	Primary Entry Point Advisory Committee
PERI	Public Entity Risk Institute
PERT	Program Evaluation and Review Technique
PFA	1) Primary Federal Agency
	2) Procurement Funding Authority
PFO	Principal Federal Official
PFOR	Principal Federal Official's Representative
PFT	Permanent Full-Time
PG	Planning Group
PH	Public Health
PHILIS	Portable High-Throughput Integrated Laboratory Identification System
PHRBAE	Public Health Readiness for Biological Agent Event
PHS	Public Health Service
P&I	Protection and Indemnity
PI	Project Inspector
PIA	Privacy Impact Assessment
PIADC	Plum Island Animal Disease Center
PIAT	Public Information Assist Team
PIC	1) Pilot In Charge
	2) Pressurized Ion Chamber
PIF	Policies In Force
PIN	Personal Identification Number
PINS	Personnel In Need of Supervision
PIO	Public Information Officer
PIPS	Pre-Incident Planning System
PIR	1) Post Implementation Review
	2) Priority Intelligence Requirement
Pkg	Package
PKI	Public Key Infrastructure
PL	1) Preparedness Level
	2) Public Law (also abbreviated as P.L.)
PL 93-288	Robert T. Stafford Disaster Relief and Emergency Assistance Act (as amended)
PLA	Principal Legal Advisor
PLC	Pacific Logistics Center
PLSS	[United States]Public Land Survey System
PLUMIS	(See PIADC [Plum Island])
PM	1) Postmaster
	2) Post Meridiem
	3) Program Manager
	4) Project Monitor
PMA	President's Management Agenda
PMCS	Preventive Maintenance Checks and Services
PMG	Program Monitoring Group
PMO	Property Management Officer
PMP	Performance Monitoring Plan
PMR	1) Patient Movement Request
	2) Physical Map Revision
PMS	1) Payments Management System
	2) Program Management System
PN	1) Part Number
	2) Project Number
PNE	Peaceful Nuclear Explosion
PNOV	Preliminary Notice of Violation
PNP	Private Non-Profit
PNR	Passenger Name Record
PNV	Present Net Value
PO	1) Personnel Office
	2) Privacy Office
	3) Post Office
	4) Project Officer
	5) Purchase Officer
	6) Purchase Order
POA	Point of Arrival
POC	Point of Contact
POD	1) Point of Departure
	2) Point of Distribution
POE	1) Point of Entry
	2) Port-of-Entry
POES	Polar-Orbiting Environmental Satellite
POI	1) Plan of Instruction
	2) Program of Instruction
POL	Petroleum, Oil, and Lubricants
POLF	Points of Light Foundation
POLREP	Pollution Report
POR	Point(s) of Review
POTS	Plain Old Telephone Service
POTUS	President of the United States
POV	Personal/Privately Owned Vehicle
PP	1) Pay Period
	2) Personal Property
	3) Personal Protection
PPA	Performance Partnership Agreement
PPB	Plans, Programs and Budget
PPBES	Planning, Programming and Budgeting Execution System
PPBM	Positive Passenger Baggage Match
PPBS	Planning, Programming, and Budgeting System
PPC	Prevention and Preparedness Council
PPCBP	Prickly Pear Cactus Burning Program
PPDS	Pre-Positioned Disaster Supplies
PPE	1) Pay Period Ending
	2) Personal Protective Equipment
PPFRP	Prepared and Perishable Food Rescue Program
PPG	Program Planning Guidance 
PPI	Preliminary (or Pre-) Placement Interview
PPM	1) Parts Per Million
	2) Printer/Plotter Module
	3) Program Performance Monitoring
PPN	Passport Number
PPR	Prior Permission Required
PR	Public Relations
PRA	1) Paperwork Reduction Act
	2) Patient Reporting Activity
PRB	Procurement Review Board
PRC	1) Peoples Republic of China
	2) Postal Rate Commission
	3) Presidential Reserve Call-up
PRER	Peacetime Radiological Emergency Response
PRIME POWER	USACE Engineer Battalion
PRISM	Performance and Registration Information Systems Management
PROFLOW	Procedural Flow
PROTECT	Program for Response Options and Technology Enhancements for Chemical/Biological Terrorism
PRP	1) Personnel Reliability Program
	2) Preferred Risk Policy
PRS	Primary Receiving Site
PRT	Planning and Response Team
PS	Program Support
PSA	1) Patient Staging Area
	2) Port Security Assessment
	3) Public Service Announcement
PSAMS	Personnel Security Activity Management System
PSAPs	Public Safety Answering Points
PSAT	Protective Security Assistance Teams
PSB	Planning Support Branch
PSD	1) Plastic Sphere Dispenser
	2) Protective Security Division
PSEPC	Public Safety and Emergency Preparedness Canada
PSGP	Port Security Grant Program
PSI	1) Pounds (of pressure) per Square Inch
	2) Proliferation Security Initiative
PSIA	Pounds per Square Inch Absolute
PSIG	Pounds per Square Inch Gauge
PSL	Private Sector Liaison 
PSMA	Pre-Scripted Mission Assignment
PSN	Public Switched Network
PSO	Private Sector (Liaison) Office
PSR	1) Personal Service Radio
	2) Power Soft Report
PSRC	Presidential Selected Reserve Call-up
PSS	Physical Security Specialist
PST	Pacific Standard Time  (GMT - 8)
PSTA	Pinellas Suncoast Transit Authority (Florida)
PSU	Port Security Unit(s)
PSWAC	Public Safety Wireless Advisory Committee
PSWN	Public Safety Wireless Network
PT	Part-Time
PT&E	Preparedness, Training, and Exercises [Directorate] (obsolete)
PTI	1) Positive Threat Identification
	2) Public Technology, Inc.
PTR	Property Transfer Report
PTSD	Post-Traumatic Stress Disorder
PTWC	Pacific Tsunami Warning Center
PUCA	Pueblo Chemical Activity
PUCD	Pueblo Chemical Depot
PUD	Planned Unit Development
PUDA	Pueblo Depot Activity
PUP	Principal User Processor
PUREX	Plutonium Uranium Extraction
PVA	Port Vulnerability Assessment
PVCS	Polyton Version Configuration System
PVO	Private Voluntary (or Volunteer) Organization
PW	Project Worksheet
PWD	Persons with Disabilities
PWR	1) Power
	2) Pressurized Water Reactor
PZ	Precautionary Zone
Q3	Quality Level 3; refers to a digital version of a Flood Insurance Rate Map (note: Q3 Data refers to the flood zone information represented on the map)
QA	Quality Assurance
Q&A	Question(s) and Answer(s)
QA/QC	Quality Assurance/Quality Control
QAPP	Quality Assurance Project Plan
QBE	Query By Example
QBO	Quasi-Biennial Oscillation
QC	Quality Control
QD	Quantity/Distance
QFR	Questions for the Record (affiliated with OLA)
QRC	Quick Reaction Checklist
QRS	Quick Response System
QRT	Quick Response Team
QSI	Quality Step Increase
QT	Total Activity Released
QTF	Quantitative Temperature Forecast
QTY	Quantity
QUF6	Uranium Hexafluoride Inventory
R	Roentgen
RA	1) Risk Assessment
	2) Regional Administrator
RAA	1) Radiological Accident Assessment 
	2) Regional Airline Association 
	3) Request for Allocation Advice
RAAW	Request for Allocation Advice Worksheet
RAC	1) Reception and Care
	2) Regional Assistance Committee
	3) Remedial Action Coordinator
RAC AC	Regional Assistance Committee Advisory Council
RACES	Radio Amateur Civil Emergency Services
RAD	1) Radiation-Absorbed Dose 
	2) Radiological
	3) Resource Allocation Decision
RADCON	Radiological Control (Team)
RADEF	Radiological Defense
RADIAC	Radioactivity Detection, Indication, and Computation
RADID	Radar Information Display
RADLAB	Radiological Laboratory
Rad/Nuc	Radiological/Nuclear
RADNUC	Radiological/ Nuclear Enforcement
RAIC	Resident Agent in Charge
RAID	1) Rapid Assessment and Initial Detection 
	2) Redundant Array of Independent Disks
RAM	1) Radiological/Radioactive Material
	2) Random-Access Memory
	3) Remedial Action Manager
RAMAC	Random Access Method Accounting Control
RAMCAP	Risk Analysis and Management for Critical Asset Protection 
RAM-D	Risk Assessment Methodology for Dams
RAMOS	Remote Automated Meteorological Observing System
RAMP	Remedial Action Management Program
RAMPID	Remedial Action Management Program Issue Database
RAMPREP	Remedial Action Management Program Report
RAMT	Radiological Assessment Medical Team
RAMTAR	Radiological Material Transportation Accident Response
RAP	1) Radiological Assistance Program
	2) Remedial Action Project
	3) Resource Allocation Plan 
RAPID	Recovery Assistance Programs Information and Delivery
RAPS	Refugees, Asylum and Parole System (DHS program, affiliated with CIS)
RAPTAD	Random Particle Transport And Diffusion
RAR	Regional Analysis and Recommendation
RARE	Roadless Area Review and Evaluation
RART	Regional Assessment and Response Team
RASCAL	Radiological Assessment System for Consequence Analysis
RASS	Radio Acoustic Sounding System
RAT	Radiological Assistance Team
RAWG	Rapid Assessment Work Group
RAWN	Radar Wind Sounding
RAWS	1) Remote Automated Weather Station
	2) Remote Automated Weather System
RBAC	Role-Based Access Control
RBCDS	Rural Business and Cooperative Development Program
RBCS	Rural Business Cooperative Service
RC	1) Reception Center
	2) Recovery Center
	3) Red Cross (also ARC)
	4) Reserve Component
RCA	1) Radiological Control Area
	2) Riparian Conservation Area
	3) Rural Community Assistance
RCAC	Red Cross Assistance Center
RCBAP	Residential Condominium Building Association Policy
RCC	1) Reception and Congregate Care
	2) Regional Climate Center
	3) Rescue Coordination Center 
RC&D	Resource Conservation and Development
RCDCB	Regional Civil Defense Coordinating Board
RCF	Release Conversion Factor
RCM	Radar-Coded Message
RCP	1) Regional Contingency Plan
	2) Regional Oil and Hazardous Substances Pollution Contingency Plan
RCRA	Resource Conservation and Recovery Act
RCS	1) Reports Control System
	2) Reactor Coolant System
RCT	Response Coordination Team
RCV	Replacement Cost Value
R&D	Research and Development
RD	1) Regional Director
	2) Restricted Data
RDB	Resource Database
RDBMS	Relational Database Management System
RDC	Regional Disaster Coordinator
RDD	Radiological Dispersion/Dispersal Device 
RDO	1) Radiological Defense Officer
	2) Regional Director's Office
	3) Regional Disaster Office
	4) Regional Duty Officer
	5) Regular Day Off  
RDOS	Real-Time Disk Operating System
RDS	Remote Delivery Site
RDT	Rapid Deployment Team
RDTE	Research, Development, Test, and Evaluation
RE	Real Estate
REA	1) Radioactive Emergency Area
	2) Rural Electrification Administration
REAC	Radiation or Radiological Emergency Assistance Center 
REACT	Radio Emergency Assistance (or associated) Communications Team
REAC/TS	Radiological (or Radiation) Emergency Assistance Center - Training Site
READI	Response to Emergencies and Disasters Institute 
REC	Regional Emergency Coordinator
RECA	Residual Capability Assessment
RECAT	Residential Capability Assessment Team
RECC	Regional Emergency Communications Coordinator
RECD	Rural Economic and Community Development
RECON	1) Reconnaissance
	2) Reconsideration
RECP	Regional Emergency Communications Plan/Planner
RECS	Radiological Emergency Communications System 
REDI	Regional Emergency Disaster Inventory
REDAM	Radiological Emergency Dose Assessment Model
REDCAP	Readiness and Capability Exercise 
REL	Recommended Exposure Limit
REM	Roentgen equivalent man/mammal
REMS	Remote Environmental Monitoring System
REMT	Regional Emergency Management Team
RENC	Regional Emergency Notification Center
REO	Regional Environmental Officer
REP	1) Radiological Emergency Preparedness
	2) Regional Evacuation Plan (or Point)
REPLO	Regional Emergency Preparedness Liaison Officer
RER	Record of Environmental Review
RERO	Radiological Emergency Response Operations
RERP	Radiological Emergency Response Plan
RERT	Radiological Emergency Response Team
RESTAT	Resources Status 
RET	Regional Emergency Transportation
RETCO	Regional Emergency Transportation Coordinator
RETREP	Regional Emergency Transportation Representative
REX	Readiness Exercise
RF	Radio Frequency
RFA	Request for Federal Assistance
RFC	River Forecast Center
RFI	1) Radio Frequency Interference 
	2) Request For Information 
RFID	Radio Frequency Identification 
RFIS	Flood Insurance Restudy
RFO	1) Ready For Occupancy
	2) Regional Field Office
RFP	Request for Proposal
RFS	Request for Service
RG	Review Guide
R/h	Roentgens per hour
RHA	1) Reduced Hazard Ammunition
	2) Regional Health Administrator
	3) Rural Housing Agency 
RHS	Rural Housing Service
RI	1) Registration Intake
	2) Remedial Investigation
RIA	Requiring Immediate Action
RIAT	Rapid Impact Assessment Team
RIC	Recovery Information Center
RICCS	Regional Incident Communication and Coordination System
RICT	Regional Incident Coordination Team
RIID	Radiation Isotope Identifier Device 
RIF	Reduction-in-Force
RISC	Regional Interagency Steering Committee
RISS or RISSNET	Regional Information Sharing System 
RLE	Run Length Encoding
RLP	Repetitive Loss Property
RLTG	Repetitive Loss Target Group
RLS	Registered Land Surveyor
RM	1) Risk Management
	2) Records Management
	3) Radiological Monitor
RMA	Risk Management Agency
RMEC	Regional Military Emergency Coordinator
RMG	Resource Management Group
RMI	Republic of the Marshall Islands
RMM	River Mile Marker
RMNCS	Regional Manager National Communications System
RMRIWFCG	Rocky Mountain Regional Interagency Wildland Fire Communications Group
RMS	Root Mean Square
RMSE	Root Mean Square Error
RMSI	Regional Maritime Security Initiative (DHS program, affiliated with USCG)
RMT	Radiological Monitoring Team
RMTN	Regional Meteorological Telecommunications Network
RMTO	Resources Management Transformation Office
RN	Registered Nurse
RNA	Rapid Needs Assessment
RNAT	Rapid Needs Assessment Team
RNCSAA	Radiological & Nuclear Countermeasure System Architectures Analysis
RNMCB	Reserve Naval Mobile Construction Battalion
RO	1) Radiological Officer
	2) Read Only
	3) Receive-Only
	4) Regional Office
	5) Reports Officer
	6) Responsible Officer
ROB	Regional Office Building
ROC	Regional Operations Center (replaced by RRCC; affiliated with EPR)
ROD	Record of Decision
ROI	Report of Investigation (affiliated with BTS/ICE)
ROM	Read-Only Memory
RON	Remain Overnight
RORO	Roll On/Roll-Off
ROS	Response Operating System
ROSS	Resource Ordering and Status System
ROST	1) Regional Office Support Team
	2) Regional Operations Support Team
ROTHR	Relocateable Over the Horizon Radar 
ROWPU	Reverse Osmosis Water Purification Unit
RP	Real Property
RPA	1) Regional Planning Agent
	2) Request for Public Assistance
	3) Resources Planning Act
RPC	Regional Preparedness Committee (obsolete)
RPG	Response Planning Guide
RPM	1) Remedial Project Manager
	2) Revolutions Per Minute 
RPO	Regional Project Officer
RPOC	Regional Point of Contact
RPPO	Radiological Pilot Program Office (DHS program, affiliated with BTS)
RPS	Radiological Protection System
RPT	Radiation Protection Technician
RPV	Remotely Piloted Vehicle (affiliated with BTS/CBP, BTS/ICE, EPR)
RQ	Reportable Quantity
R&R	Response & Recovery
RR	1) Railroad
	2) Response & Recovery (also R&R)
	3) Rest and Relaxation
	4) Rural Route
RRAC	Regional Radiological Assistance Committee
RRCC	Regional Response Coordination Center (replacing ROC)
RRF	Regional Response Force
RRIS	Rapid Response Information System
RRP	Regional Response Plan
RRRV	Regional Rapid Response Vehicle
RRT	1) Radiological Response Team
	2) Regional Response Team
RRWG	Reward and Recognition Working Group
RS	1) Regional Summary
	2) Remote Sensing
	3) Response Support
RSC	Remote Sensing Coordinator
RSD	Remote Sensing Data
RSI	Repetitive Stress Injury
RSP	Regular Services Program
RSPA	Research and Special Programs Administration
RSS	Remote Storage Site
RSSC	Remote Sensing Support Coordinator
RST	1) Regional Support Team
	2) Reference Standard Time
	3) Remote Sensing Team
RSTA	Reconnaissance, Surveillance, and Target Acquisitions
RSU	Response Support Unit
RSVP	Retired Senior Volunteer Program
RT	Resource Tracking (or Tracker)
RTAP	Real-Time Analytical Platform
RTF	1) Response Task Force
	2) Rich Text Format
RTF-E	Response Task Force - East
RTF-W	Response Task Force - West
RTI	Regional Technology Integration 
RTK	Real Time Kinematic
RTM	Regional Training Manager
RTS	Regional Transit System
RUS	Rural Utilities Service(s)
RVT	Remote Video Terminal
RWA	Reimbursable Work Authorization
RWP	Regional Work Plan
RWS	Revised Work Schedule
RX	1) Prescribed (fire)
	2) Prescription (medical)
	3) Reactor
S	1) Staging Area
	2) State agency
S-60	DOT Office of Intelligence Security
SA	1) Salvation Army
	2) Special Agent
	3) Support Agency
SAA	State Administrative Agency 
SAAM	Special Airlift Assignment Mission
SAAR	Secretary's After Action Report
SABA	Supplied Air Breathing Apparatus 
SABT	Special Agent Bomb Technician
SAC	1) Special Agency in Charge
	2) Special Agent-in-Charge (FBI)
SAD	Southern Area District 
SAE	1) Site Area Emergency
	2) Stafford Act Employee (also DAE)
SAFECOM	1) Safe Community (DHS program)
	2) Safety Communique
SAFE TEA	Safer, Accountable, Flexible Transportation Efficiency Act (affiliated with USCG)
SAFETY ACT	Support Anti-Terrorism by Fostering Effective Technologies Act of 2002 
SAFTI	Secure and Facilitated International Travel Initiative 
SAIC	1) Science Applications International Corporation 
	2) Special Agent in Charge (USSS)
SALEMDUG	State and Local Emergency Managers Data Users Group
SAM	Surface to Air Missile (affiliated with BTS/TSA)
SAME	Specific Area Message Encoding
SAMHSA	Substance Abuse and Mental Health Services Administration
SAMP	Special Area Management Plan
SANS	SysAdmin, Audit, Network, Security (SANS Institute)
SAO	1) Security Advisory Opinions (DHS program, affiliated with BTS)
	2) State Approving Official/Officer (affiliated with EPR)
SAP	1) Special Access Program
	2) State Administrative Plan
SAR	1) Safety Analysis Report
	2) Search and Rescue 
	3) Special Access Required 
	4) Synthetic Aperture Radar
SARA	Superfund Amendments and Reauthorization Act
SARDA	State Airborne Reconnaissance for Damage Assessment
SAREX	Search and Rescue Exercise 
SARS	1) Security Activities Reporting System
	2) Severe Acute Respiratory Syndrome 
SARSAT	Search and Rescue Satellite-Aided Tracking
SART	State Animal Response Team
SAS	Secondary Antenna System
SAST	Scientific Assessment and Strategy Team
SAT	1) Satellite
	2) Simplified Acquisition Threshold
SATCOM	Satellite Communications
SATERN	Salvation Army Team Emergency Radio Network
SATO	Scheduled Airline Ticket Office
SAV	1) Site Assist Visit (affiliated with IAIP)
	2) Staff Assistance Visit
SBA	1) Shared Border Accord 
	2) Small Business Administration 
SBC	Southern Baptist Convention
SBCCI	Southern Building Code Congress International
SBCCOM	Soldier and Biological Chemical Command (U.S. Army)
SBD	Smart Border Declaration
SBI	Special Background Investigation
SBIR	Small Business Innovation Research 
SBL	Straight Bill-of-Lading (also SBOL)
SBOL	Straight Bill-Of-Lading
S-BOSS	Scenario-Based Orientation for Senior Staff
SBU	Sensitive But Unclassified 
SC	1) Section Chief
	2) Study Contractor
SCADA	Supervisory Control and Data Acquisition System 
SCAT	1) Security Control of Air Traffic
	2) Space Coast Area Transit (Florida)
SCATANA	Security Control of Air Traffic and Air Navigation Aids
SCBA	Self-Contained Breathing Apparatus
SCC	Secretary's Command Center
SCD	Service Computation Date
SCEC	Southern California Earthquake Center
SCEPC	Senior Civil Emergency Planning Committee (NATO)
SCG	Security Classification Guide
SCI	Sensitive Compartmented Information
SCIC	Software Control Integration Center
SCIF	Sensitive Compartmented Information Facility
SCM	Survivable Crisis Management
SCO	State Coordinating Officer
SCOTUS	Supreme Court of the United States
SCP	Security Control Point 
SCR	Software (or System) Change Request
SCRAG	Senior Civilian Representative of the Attorney General
SCRR	Special Conversion Recommendation Report
SCS	Soil and Conservation Service
SCSEP	Senior Citizen Service Employment Program
SCSN	Southern California Seismic Network
SD	Security Directive
SDA	Seventh Day Adventist
SDD	Software Development Division
SDF	Special Direct Facility
SDLO	Senior Disaster Logistics Official/Officer
SDO	1) Staff Duty Officer
	2) Standards Development Organizations
SDP	1) Secretarial Development Program
	2) Service Delivery Point
SDTS	1) Spatial Data Transfer Standard(s)
	2) Spatial Data Transfer System
SDWIS	Safe Drinking Water Information System
S&E	Salaries and Expenses
SEAT	Single Engine Airtankers
SEB	Staphylococcus Enterotoxin type B
SEC	Securities and Exchange Commission 
SECARMY	Secretary of the Army
SECC	State Emergency Coordination Center
SECDEF	Secretary, Department of Defense
SECDHS	Secretary, Department of Homeland Security
SECHHS	Secretary, Department of Health and Human Services
SECLAN	Secure Local Area Network
SECURE	Strategic Communications Resources Effort 
SED	Shippers Export Declaration 
SEI	Software Engineering Institute
SEL	Standardized Equipment List
SELS	Severe Local Storms
SEMA	State Emergency Management Agency
SEMO	State Emergency Management Office
SEMS	Standardized Emergency Management System
SENTINEL	Securing the Nation through Infrastructure Enhancements Locally
SENTRI	Secure Electronic Network for Traveler's Rapid Inspection (Fast inspection lanes at border; Program which allows low-risk travelers to enter through a dedicated lane at the U.S./Mexico border with minimal or no delay)
SEOC	State Emergency Operations Center 
SEPLO	State Emergency Preparedness Liaison Officer
SERC	State Emergency Response Commission
SERF	Standard Exercise Report Form/Format
SERL	Special Events Readiness Level (see below)
SERL I	Unique event requiring full support of US Government
SERL II	Primary event requiring local resource augmentation and limited predeployment of US Government assets
SERL III	Secondary event requiring limited local resource augmentation and limited predeployment of US Government assets 
SERL IV	Minor event generally requiring no US Government asset support
SERT	1) Secretary's Emergency Response Team (DHHS)
	2) State Emergency Response Team (DHS program, affiliated with EPR)
SES	Senior Executive Service
SET	Source Evaluation Team
SEUS	Snow Estimation and Updating System
SEVIS	Student and Exchange Visitor Information System
SEVP	Student and Exchange Visitor Program
SF	1) Special Facility
	2) Standard Form
SFAR	Special Federal Aviation Regulation
SFHA	Special Flood Hazard Area
SFIP	Standard Flood Insurance Policy
SFO	1) Senior Federal Official
	2) Senior FEMA Official
	3) State Field Office(r)
SFP	Supplementary Feeding Program
SFSO	Senior Financial Services Officer
SG	Surgeon General
SGTR	Steam Generator Tube Rupture
SGTS	Standard Gas Treatment System
SHARES	Shared Resources (NCS high frequency radio network)
SHMO	State Hazard Mitigation Officer
SHMP	State Hazard Mitigation Program
SHO	State Health Officer
SHPO	State Historic Preservation Office
SHSAS	State Homeland Security Assessment and Strategy
SHSGP	State Homeland Security Grant Program 
SHSI	Sensitive Homeland Security Information 
SICG	Senior Interagency Coordination Group
SID	Station Identifier
SIDA	Security Identification Display Area 
SIED	Special Improvised Explosive Device
SIES	Strategic Industries and Economic Security, Office of 
SIF	Standard Interchange Format
SIGINT	Signals Intelligence
SIGMET	Significant Meteorological Information
SIMBAD	Sensor Integration and Modeling for Biological Agent Detection
SIMCELL	Simulation Cell
SIOC	Strategic Information (or Intelligence) and Operations Center 
SIOP	Single Integrated Operational Plan
SIP	1) Shelter-In-Place
	2) Streamlined Inspection Program
SIT	Situation Reporting System
SITREP	Situation Report
SITROOM	Situation Room
SITSTAT	Situation Status
S&L	1) Savings and Loan
	2) State and Local
SLA	State and Local Assistance
SLAR	Side-Looking Airborne Radar
SLBM	Submarine-Launched Ballistic Missile
SLC	1) Salt Lake City
	2) Subscriber Line Carrier
SLE	State and Local Exercise
Sleeping Dragon	Term used to identify a barrier of protesters who have linked themselves to one another
SLEP	State and Local Exercise Program
SLG	State and Local Guide
SLGCP	State and Local Government Coordination & Preparedness, Office of
SLO	State Liaison Officer
SLOSH	Sea, Lake and Overland Surges from Hurricanes
SLPA	Sea Level Pressure Anomaly
SLSAC	State and Local Officials Senior Advisory Committee
SLUDGEM	Salivation, Lacrimation, Urination, Defecation, Gastric Distress, Emesis and Miosis
SM	1) Shelter Management
	2) Student Manual
SMAC	State Mapping Advisory Committee
SMC	Specialty/Specialized Management Center
SMCC	System Management Control Center
SME	Subject-Matter Expert
SMG	Specialty Management Group
SMHA	State Mental Health Agency
SMI	1) Safety Management Institute
	2) Smithsonian Institute 
SMMA	Standard Mitigation Measures Agreement
SMO	Security Management Office (DHS subdivision, affiliated with MGMT)
SMS	Short Message Service
SMSA	Standard Metropolitan Statistical Area
SMSD	State-Managed Small Disaster
SMU	Special Mission Unit (affiliated with EPR)
SN	Serial Number
SNA	Survivable Network Analysis
SNL	Sandia National Laboratory
SNM	Special Nuclear Material
SNS	Strategic National Stockpile
SO	1) Safety Officer 
	2) Sheriff's Office
SOB	Souls On Board
SOC	1) Statement of Concern
	2) State or Security Operations Center 
SOE	1) Senior Officials Exercise(s)
	2) Summary of Expenses
SOF	Special Operations Forces
SOFA	Status of Forces Agreement
SOG	Seat of Government
SOI	Southern Oscillation Index
SOLAS	Safety of Life at Sea
SOLIC	Special Operations-Low Intensity Conflict
SOLRAD	Solar Radiation
SOMA	Summary of Map Actions
SON	Statement of Need
SONET	Synchronous Optical Network
SONS	Spill of National Significance
SOP	Standard Operating Procedure(s)
SOPEP	Shipboard Oil Pollution Emergency Plan
SOR	Statement of Requirement
SOS	Status of Studies
SOSC	State On-Scene Coordinator
SOW	Statement of Work
SPC	Storm Prediction Center
SPCA	Society for the Prevention of Cruelty to Animals
SPDC	Small Business Development Center
SPE	1) Skill Performance Evaluation
	2) Strategic Planning and Evaluation
SPEGL	Short-term Public Emergency Guidance Level
SPG	1) Senior Policy Group 
	2) Strategic Planning Guide 
SPIRIT	Security, Planning, and Integrated Resources for Information Technology 
SPLASH	Special Program to List the Amplitude of Surge from Hurricanes
SPOD	Seaport of Debarkation
SPOE	Seaport of Embarkation
SPOT	1) Satellite Positioning and Tracking
	2) Systeme Probatoire d'Observation de la Terre (French satellite system)
SPP	1) Screener Partnership Program 
	2) Secure Passage Program 
SPR	Special Problem Report
SPRB	Senior Performance Review Board
SQL	Structured Query Language
SRA	1) Safe Refuge Area
	2) Society for Risk Analysis
SRD	Self-Reading Dosimeter
SRF	Service Response Force
SRFC	Service Response Force Commander
SRFX	Service Response Force Exercise
SRSC	Strategic Review Steering Committee
SRV	Safety Relief Value
SSA	1) Self Storage Association 
	2) Social Security Administration
	3) Survivable Systems Analysis 
SSAN	Social Security Account Number
SSB	Single Side Band
SSBI	Single-Scope Background Investigation
SSC	1) Scientific Support Coordinator
	2) Strategic Storage Center
SSE	Safe Shutdown Earthquake
SSFSD	Secret Service Forensic Sciences Division 
SSG	Strategic Sourcing Group
SSHS	Saffir-Simpson Hurricane Scale
SSI	Supplemental Security Income
SSL	Secure Socket Layer(s)
SSN	Social Security Number
SSP	Species Survival Plan
SSS	1) Selective Service System
	2) Small Structure Survey 
SSSE	State Support Service Element
SST	1) Safe Secure Transport
	2) Sea-Surface Temperature
	3) Shelter Survey Technician
	4) Supersonic Transport
S&T	Science and Technology 
STA	Special Temporary Authority
STAFFORD ACT - OUTLINE
TITLES and SECTION NUMBERS
(42 U.S.C. counterpart number in parenthesis)
TITLE I	Findings, Declarations, and Definitions
101 ( 5121)	Findings and Declarations
102 ( 5122)	Definitions
TITLE II	Disaster Preparedness and Mitigation Assistance
201 ( 5131)	Federal and State Disaster Preparedness Programs
202 ( 5132)	Disaster Warnings
203 ( 5133)	Predisaster Hazard Mitigation
204 ( 5134)	Interagency Task Force
TITLE III	Major Disaster and Emergency Assistance Administration
301 ( 5141)	Waiver of Administrative Conditions
302 ( 5143)	Coordinating Officers
303 ( 5144)	Emergency Support Teams
304 ( 5147)	Reimbursement
305 ( 5148)	Non-liability of Federal Government
306 ( 5149)	Performance of Services
307 ( 5150)	Use of Local Firms and Individuals
308 ( 5151)	Nondiscrimination in Disaster Assistance
309 ( 5152)	Use and Coordination of Relief Organizations
310 ( 5153)	Priority for Public Housing
311 ( 5154)	Insurance
312 ( 5155)	Duplication of Benefits
313 ( 5156)	Standards and Reviews
314 ( 5157)	Penalties
315 ( 5158)	Availability of Materials
316 ( 5159)	Protection of Environment
317 ( 5160)	Recovery of Assistance
318 ( 5161)	Audits and Investigations
319 ( 5162)	Advance of Non-Federal Share
320 ( 5163)	Limitation on Use of Sliding Scales
321 ( 5164)	Rules and Regulations
322 ( 5165)	Mitigation Planning
323 ( 5165a)	Minimum Standards for Public and Private Structures
324 ( 5165b)	Management Costs
325 ( 5165c)	Public Notice, Comment, and Consultation Requirements
TITLE IV	Major Disaster Assistance Programs
401 ( 5170)	Procedure for Declaration
402 ( 5170a)	General Federal Assistance
403 ( 5170b)	Essential Assistance
404 ( 5170c)	Hazard Mitigation
405 ( 5171)	Federal Facilities
406 ( 5172)	Repair, Restoration, and Replacement of Damaged Facilities
407 ( 5173)	1) Debris Removal
408 ( 5174)	Federal Assistance to Individuals and Households
410 ( 5177)	Unemployment Benefit Assistance
412 ( 5179)	Food Coupons and Distribution
413 ( 5180)	Food Commodities
414 ( 5181)	Relocation Assistance
415 ( 5182)	Legal Services
416 ( 5183)	Crisis Counseling Assistance and Training
417 ( 5184)	Community Disaster Loans
418 ( 5185)	Emergency Communications
419 ( 5186)	Emergency Public Transportation
420 ( 5187)	Fire Management Assistance
421 ( 5188)	Timber Sale Contracts
422 ( 5189)	Simplified Procedure
423 ( 5189a)	Appeals of Assistance Decisions
424 ( 5189b)	Date of Eligibility; Expenses Incurred Before Date of Disaster
TITLE V	Emergency Assistance Programs
501 ( 5191)	Procedure for Declaration
502 ( 5192)	Federal Emergency Assistance
503 ( 5193)	Amount of Assistance
TITLE VI	Emergency Preparedness
601 ( 5195)	Declaration of Policy
602 ( 5195a)	Definitions
603 ( 5195b)	Administration of Title
611 ( 5196)	Detailed Functions of Administration
612 ( 5196a)	Mutual Aid Pacts Between States and Neighboring Countries
613 ( 5196b)	Contributions for Personnel and Administrative Expenses
614 ( 5196c)	Requirement for State Matching Funds for Construction of Emergency Operating Centers
615 ( 5196d)	Use of Funds to Prepare for and Respond to Hazards
621 ( 5197)	Administrative Authority
622 ( 5197a)	Security Regulations
623 ( 5197b)	Use of Existing Facilities
624 ( 5197c)	Annual Report to Congress
625 ( 5197d)	Applicability of Title
626 ( 5197e)	Authorization of Appropriations and Transfers of Funds
627 ( 5197f)	Relation to Atomic Energy Act of 1954
628 ( 5197g)	Federal Bureau of Investigation
TITLE VII	Authority to Prescribe Rules and Accept Gifts
701 ( 5201)	Authority to Prescribe Rules and Accept Gifts
705 ( 5205)	Disaster Grant Closeout Procedures
STAR	1) Science-based Threat Analysis and Response Programs
	2) Studies, Training, Analysis, and Research 
STARC	State Area Command
START	1) Scientific and Technical Advisory and Response Team 
	2) Scientific and Technical Analysis and Response Team
	3) Security Through Advanced Research & Technology (NY State Program)
	4) Superfund Technical Assessment and Response Team
STARTEAM	Specialized Target Area Registration Team
STARTEX	Start of Exercise
STATEX	Statutory Exclusion
STATREP	Status Report
STB	Surface Transportation Board
STC	1) Satellite Teleregistration Center
	2) State Coordinator
STCC	Standard Transportation Commodity Code
STDO	Security Technology Deployment Office
ST-DOSE	Source Term to Dose
STEP	State Tribal Education Program
ST ISAC	Surface Transportation Information Sharing and Analysis Center
STO	Special Technical Operations
STOC	Sniper Tactical Operations Center
STOLS	System To Locate Survivors
STR	Suspicious Transaction Report
STSC	Student and Schools System 
STU	1) Satellite Transmission Unit
	2) Secure Telephone Unit 
STU-III	Secure Telephone Unit - Third Generation
STU-IV	Secure Telephone Unit - Fourth Generation
SUA	1) Specified Unlawful Activities
	2) Special Use Airspace
SUI	Sensitive Unclassified Information
SUM	Software User's Manual
SUMA	Supply Management
SUPREPS	Supplemental Reports Created by OIC
SUPSALV	Supervisor of Salvage
Svc	Service
SVIS	Secure Video System
SVOS	Secure Voice System
SVTC	Secure Video Teleconference
SVTS	Secure Video Teleconferencing System
SW	Soil and Water
SWAT	Special Weapons and Tactics
SWC	Severe Weather Center
SWEL	Stillwater Flood Elevation
SWFL	Stillwater Flood Level
SWG	Security Working Group 
SWGDE	Scientific Working Group on Digital Evidence 
SWIS	Satellite Weather Information System
SWP	1) State Warning Point
	2) State Weekends Program
SWS	Severe Weather Statement
T2	Top Officials Exercise/TOPOFF 2
T&A	Time and Attendance
TA	1) Table of Allowances
	2) Technical Assistance
	3) Time and Attendance
	4) Travel Authorization
TAC	1) Technical Advisory Committee
	2) Technical Assistance Contractor
TACACS	Terminal Access Controller Access Control System
TAC-DESK	Tactical Desk
TACLET	Tactical Law Enforcement Team 
TAC-SMC	Tactical Specialized Management Center
TADS	1) Threat Assessment Database System
	2) Training Aids for Dam Safety
TAES	Tactical Aeromedical Evacuation System
TAFA	Terrorism and Foreign Assassination 
TAFT	Test, Analyze, Fix and Test
TAG	1) Technology & Architecture Group
	2) The Adjutant General
	3) Threat Advisory Group
TAOS	The Arbiter of Storms
TAPS	Trans-Alaska Pipeline System
TAR	Tone-Alert Radio
TARS	Tethered Aerostat Radar System
TAVISS	Targeted Violence Information Sharing System 
TBA	1) To Be Announced
	2) Thyroid Blocking Agent (see KI)
TBD	To Be Determined
TBM	Temporary Bench Mark
TBP	To be published 
TBR	Travel Business Roundtable 
T&C	Time and Cost
TC	Technical Committee
T-CAR	Tribal Capability Assessment for Readiness
TCC	1) Telecommunications Center
	2) Transportable Communications Center 
	3) Telephone Contact Center 
TCD	Tropical Cyclone Discussion
TCO	Territorial Coordinating Officer
TCP	1) Traffic Control Point
	2) Telecommunications Priorities
TCS	1) (Standard Flood Hazard) Tracking and Correspondence System
	2) Tactical Control System(s)
TCU	1) Threat Containment Unit
	2) Transportation Coordination Unit 
TDD	Telecommunications or Teletype Device for the Deaf
TDFM	Traffic Demand Forecast Model
TDO	Typhoon Duty Officer
TDS	Time, Distance, and Shielding
TDY	Temporary Duty
T&E	Threatened and Endangered
TEAM-CPR	Thermal, Etiological, Asphyxiation, Mechanical, Chemical, Psychological, and Radioactive
TECS	Treasury Enforcement Communications System
TED	Total Effective Dose
TEDE	Total Effective Dose Equivalent
TEEX	Texas Engineering Extension Service
TEL	Transporter-Erector-Launcher
TELNET	Teleconference Network
TEMA	Tennessee Emergency Management Agency
TEMP	1) Temporary Employee
	2) Test and Evaluation Master Plan
TEOAF	Treasury Executive Office of Asset Forfeiture 
TEOC	Transportation Emergency Operations Center
TEU	Technical Escort Unit 
TEW	Terrorist Early Warning (Group)
TF	Task Force
TFCC	Task Force Control Center
TFL	Task Force Leader
TFR	Temporary Flight Restriction 
TFT	Temporary Full Time
TH	1) Temporary Housing
	2) Technological Hazards
THA	Temporary Housing Assistance
THAMIC	Toxic Hazard Analysis Model for Industrial Chemicals
THO	Temporary Housing Officer
THP	Temporary Housing Program
THREATCON	Threat Condition
TIA	1) Telecommunications Industry Association
	2) Terrorism Information Awareness
TIARA	Tactical Intelligence and Related Activities 
TIAS	Training Information Access System
TIER	Treasury Information Executive Repository
TIFF	Tagged Image File Format
TIGER	Topologically Integrated Geographic Encoding and Reference (System)
TIMACS	Telecommunications Inventory Management and Control System
TIN	1) Taxpayer Identification Number
	2) Triangular Irregular Network
TIOC	Transportation Information Operations Center
TIP	Threat Image Protection 
TIPS	Terrorist Information and Prevention System
TIROS	Television and Infrared Observation Satellite
TISP	The Infrastructure Security Partnership 
TL	1) Team Leader
	2) Truckload
TLC	Territory Logistics Centers
TLC-C	Territory Logistics Center- Central
TLC-E	Territory Logistics Center- East
TLC-W	Territory Logistics Center-West
TLD	Thermoluminescent Dosimeter 
TLV	Threshold Limit Value
TM	Trademark
TMARS	Team Management and Rostering System
TMC	1) Transportation Management Center
	2) Travel Management Center
TMI	Three Mile Island (Nuclear Power Plant)
TMS	1) Training Management System
	2) Traffic Management Specialist
TMT	1) Traffic Management Team
	2) Training Management Team
TNC	Terminal Node Controller
TNT	Trinitrotoluene
TOA	1) Time of Arrival
	2) Transportation Operating Agency(ies)
TOC	1) Table of Contents
	2) Tactical Operations Center
	3) Traffic Operations Center
TOCDF	Tooele Chemical Disposal Facility
TOPOFF	Top Officials (exercise series)
TOSC	Tactical On-Scene Commander
TOT	Time on Target
TPC	Tropical Prediction Center
TPED	Tasking, Processing, Exploitation and Dissemination
TPFDD	Time-Phased Force Deployment Data
TPFDL	Time-Phased Force Deployment List
TPO	1) Technical Program(s) Officer
	2) Transition Planning Office 
TPS	Temporary Protected Status 
TR	Transportation Request
TRACEM	Thermal, Radioactive, Asphyxiation, Chemical, Etiological, and Mechanical
TRAC2ES	TRANSCOM's Regulating and Command and Control Evacuation System
TRADE	Training Resources And Data Exchange 
TransCAER	Transportation Community Awareness Emergency Response
TRC	1) Telephone Response Center
	2) Technology Review Committee
Treas	Department of the Treasury
TRES	Department of Treasury (Federal Government, affiliated with EPR)
TRIA	Terrorism Risk Insurance Act (affiliated with PSO)
TRICS	Telephone-to-Radio Interface Communications System
TRIP	Transit (and) Rail Inspection Pilot (DHS program, affiliated with BTS/TSA)
TRIPS	Travel Reporting and Information Processing System
TRO	Transient Accommodations Only
TROPAN	Tropical Analysis Facsimile Network
TROR	Treasury Report on Receivables
TRP	Tactical Response Plan
TRT	Tactical Response Team
TS	1) Thunderstorm
	2) Top Secret
	3) Tropical Storm
TSA	1) The Salvation Army
	2) Transportation Security Administration 
TSAC	Towing Safety Advisory Committee 
TSAR	Transportation Security Administration Representative
TSARM	TSA Self-Assessment Risk Module
TSB	1) Technical Services Branch
	2) Training Support Brigade 
TSC	1) Technical Support Center
	2) Terrorist Screening Center (affiliated with DHS/BTS, DOS, FBI, CIA, DOJ)
TSCA	Toxic Substance Control Act
TSCC	Transportation Security Command Center (affiliated with BTS)
TSCM	1) Technical Security Countermeasure 
	2) Technical Surveillance Countermeasures 
TSCO	Top Secret Control Officer
TSD	Technical Services Division
TSDN	Technical Support Data Notebook
TSDR	Toxic Substance and Disease Registry
TSIS	Transportation Security Intelligence Service 
TSN	Trade Support Network
TSP	1) Telecommunications Service Priority
	2) Thrift Savings Plan
	3) Total Suspended Particulates
	4) Transit Security Program 
TSPSOC	Telecommunications Service Priority/System Oversight Committee 
TSR	1) Telecommunications Service Request
	2) Teleregistration Service Representative
TSWG	Technical Support Working Group
TT	Travel Trailer
TTC	Technical Training Center
TT&E	Training, Testing and Exercising
TTIC	Terrorism/Terrorist Threat Integration Center 
TTPP	Transportation Threat Protection Program
TTT	Train-the-Trainer
TTWS	Terrorist Threat Warning System (DHS program, affiliated with HSOC)
TTX	Tabletop Exercise 
TTY	Teletypewriter
TUAV	Tactical Unmanned Aerial Vehicle
TUTT	Tropical Upper Tropospheric Trough
TV	1) Television
	2) Thomasville, Georgia
TVA	Tennessee Valley Authority
TVTA	Threat and Vulnerability, Testing and Assessment 
TWA	Time Weighted Average
TWD	Tropical Weather Discussion
TWIC	Transportation Workers Identification Credential 
TWOV	Transit Without Visa Program 
TWVP	(see TWOV)
UA	1) Unauthorized Absence
	2) Upper Air
UAC	Unified Area Command
UASI	Urban Area Security Initiative 
UAV	Unmanned Aerial Vehicle 
UC	1) Unemployment Compensation
	2) Unified Command
UC/IC	Unified Command / Incident Command
UCGIS	University Consortium for Geographic Information Science
UCP	1) Unified Command Plan
	2) Unified Command Post
UCT	1) Universal Coordinated Time 
	2) Unified Command Team
UD	Unified Defense
UDA	Undocumented Aliens
UEL	Upper Explosive Limit
UF6	Uranium Hexafluroide
UGC	Universal Generic Code
UHF	Ultra High Frequency
UI	Unemployment Insurance
ULF	Ultra Low Frequency
ULN	Unit Line Number(s)
ULO	Unliquidated Obligation
ULP	Unfair Labor Practice
UMCA	Umatilla Chemical Activity
UMCD	Umatilla Chemical Depot
UMCOR	United Methodist Committee On Relief
UMDA	UMatilla Depot Activity
UMOC	Unified Medical Operations Center
UMP	Upward Mobility Program
UN	United Nations (foreign, affiliated with EPR, OIA)
UNCLAS	Unclassified
UNDRO	United Nations Disaster Relief Organization
UNHCR	United Nations High Commissioner for Refugees
UNP	Unmet Needs Program
UNSCOM	United Nations Special Commission
UOC	USACE Operations Center
UO2F2	Uranyl Fluoride
UBC	Uniform Building Code
UPC	Universal Product Code
UPS	1) Uninterruptable Power Supply
	2) United Postal Service
URA	Uniform Relocation Act
URISA	Urban and Regional Information Systems Association
URL	Uniform Resource Locator 
US	1) Under Secretary (also U/S)
	2) United States
USA	1) United States of America
	2) United States Army 
USACBDC	United States Army Chemical and Biological Defense Command
USACDA	US Arms Control and Disarmament Agency
USACDRA	United States Army Chemical Demilitarization and Remediation Activity
USACE	United States Army Corps of Engineers    (ESF 3)
USACHPPM	United States Army Center for Health Promotion and Preventive Medicine
USACMDA	United States Army Chemical Material Destruction Agency
USACOM	United States Atlantic Command (obsolete; se USJFCOM)
USADACS	United States Army Defense Artillery Center and School
USAF	United States Air Force 
USAFA	United States Air Force Academy 
USAID	United States Agency for International Development 
USA-ITA	U.S. Association for Importers of Textiles and Apparel (private sector association, affiliated with BTS/CBP)
USAMRAA	US Army Medical Research Acquisition Activity
USAMRICD	United States Army Medical Research Institute of Chemical Defense (DOD program, affiliated with EPR, S&T)
USAMRIID	United States Army Medical Research Institute for Infectious Disease 
USANCA	United States Army Nuclear and Chemical Agency
USA PATRIOT [Act]	Uniting & Strengthening America by Providing Appropriate Tools Required to Intercept & Obstruct Terrorism
US&R	Urban Search and Rescue 
USAR	United States Army Reserve
USBP	United States. Border Patrol
USBR	United States Bureau of Reclamation
USC	1) United States Citizen 
	2) United States Code 
USCERT	United States Computer Emergency Response Team 
USCG	United States Coast Guard 
USCGR	United States Coast Guard Reserve
USCIS	United States Citizenship and Immigration Services (aka CIS) 
USCOLD	United States Committee On Large Dams 
USCS	United States Customs Service 
USCSCFAC	U.S. Customs Service COBRA Fees Advisory Committee 
USDA	United States Department of Agriculture 
USDA/CSREES	United States Department of Agriculture/Cooperative State Research, Education and Extension Service (aka the Extension Service)
USDOI	United States Department of the Interior
USDOL	United States Department of Labor
USDOT	United States Department of Transportation [ESF-1]
USFA	United States Fire Administration 
USFS	United States Forest Service (DOI division) [ESF-4]
USFWS	United States Fish and Wildlife Service
USG	United States Government 
USGS	United States Geological Survey
USGS-DLG	United States Geological Survey Digital Line Graph (Format)
USIA	United States Information Agency 
USIC	United States Interdiction Coordinator 
USJFCOM	United States Joint Forces Command 
USMC	United States Marine Corps 
USMCR	United States Marine Corps Reserve
USML	United States Munitions List
USMRICD	United States Army Medical Research Institute of Chemical Defense
USMS	United States Marshals Service 
USMTF	United States Message Text Format
USN	United States Navy 
USNR	United States Naval Reserve
USNORTHCOM	United States Northern Command 
USOC	United States Olympic Committee
USPACOM	United States Pacific Command
USPHS	United States Public Health Service 
USPIS	United States Postal Inspection Service 
USPP	United States Park Police 
USPS	United States Postal Service 
USS	1) United States Senate
	2) United States Ship
USSOCOM	United States Special Operations Command
USSOUTHCOM	United States Southern Command
USSPACECOM	United States Space Command
USSS	United States Secret Service 
USSTRATCOM	United States Strategic Command
UST	Underground Storage Tank
USTA	United States Telecom Association
USTR	United States Trade Representative Office 
USTRANSCOM	United States Transportation Command
USVI	United States Virgin Islands
US-VISIT	United States Visitor and Immigrant Status Indicator Technology 
UTC	1) Unit Type Code
	2) Universale Temps Coordinaire (i.e., Coordinated Universal Time)
UTCP	Unified Tactical Communications Program 
UTM	Universal Transverse Mercator
UV	Ultraviolet
UVI	Ultraviolet Index
v	volt
VA	1) Vulnerability Assessment
	2) Department of Veteran's Affairs 
VACIS	Vehicle and Cargo Inspection System 
VAERS	Vaccine Adverse Event Reporting System
VAL	Voluntary Agency Liaison
VAMC	Veteran's Administration Medical Center
VAX	Virtual Address Extension
VBIED	Vehicle-Borne Improvised Explosive Device
VCC	Venue Control Cell (affiliated with EPR)
VCR	Video Cassette Recorder
VCU	VOLAG Coordination Unit
VDEM	Virginia Department of Emergency Management
VDU	1) Visual Display Unit
	2) Visual Docking Unit
VEE	Venezuelan Equine Encephalitis
VEI	Volcanic Explosivity Index
VERA	Voluntary Early Retirement Authority
VFD	Volunteer Fire Department
VFR	Visual Flight Rules
VGA	Video Graphics Adapter
VHA	Veterans Health Administration 
VHF	Very High Frequency
VI	Virgin Islands
VIA	By way of
VIG	Vaccinia Immuno Globulin
VIK	Value-In-Kind
VIP	1) Very Important Person
	2) Volunteer Incentive Program 
VIPS	Volunteers In Police Service 
VISC	Visual Information Support Center
VISIT	Visitor & Immigrant Status Indicator Technology (affiliated with BTS/CIS)
VISN	Veterans Integrated Services Network
VISTA	Volunteers In Service To America
VITA	Volunteers In Technical Assistance
VITEMA	Virgin Islands Territorial Emergency Management Agency
VLF	Very Low Frequency
VMAS	Vertical Map Accuracy Standard
VMAT	Veterinary Medical Assistance Team
VMS	Virtual Memory System
VNPSC	Virginia National Processing Service Center
VOA	Volunteers of America
VOAD	Voluntary Organizations Active in Disaster
VoID	Voice over Internet Protocol
VOLAG	Voluntary Agency
VOR	Visual Omni Ranger
VORTEX	Verification of the Origin of Rotation in Tornadoes Experiment
VOSS	Vessel of Opportunity Skimming System 
VPS	Vector Product Format
VRC	Volunteer Reception Center
VRP	Vessel Response Plan
VS	Victim Support
VSAB	Vehicle Storage Administration Building
VSP	Visa Security Program
VST	Victim Support Task
VSU	Visa Security Unit 
VTC	Video Tele-Conference
VWPPA	Visa Waiver Permanent Program Act of 2000 
V-Zone	Coastal High Hazard Area
W	watt
WAE	When Actually Employed
WAN	Wide Area Network
WAR	Weekly Activity Report
WARNO	Warning Order
WATS	Wide Area Telecommunications Service
WAWAS or WAWS	Washington Area Warning System 
WAWTAP	Wind And Water Technical Assistance Program
WB	1) Whole Body
	2) Wideband
WCATWC	West Coast & Alaska Tsunami Warning Center
WCO	World Customs Organization
WCRP	World Climate Research Program
WEE	Western Equine Encephalitis
WELP	Women's Executive Leadership Program
WEM	Workshop in Emergency Management
WER	Weapons-Effect Reporting
WESTPAC	Western Pacific
WFSA	Wildland Fire Situation Analysis
WFU	Wildland Fire Use 
WGI	Within-Grade Increase
WH	1) Warehouse
	2) White House
WHCA	White House Communications Agency
WHLO	White House Liaison Office
WHMO	White House Military Office
WHO	World Health Organization 
WHS	Washington Headquarters Services
WHSR	White House Situation Room 
WIFLE	Women in Federal Law Enforcement
WIMS	Weather Information Management System
WIN	WWMCCS Intercomputer Network (obsolete)
WITS	Washington Interagency Telecommunications System
WMA	Washington Metropolitan Area 
WMATA	Washington Metropolitan Area Transport Authority 
WMD	1) Water Management District
	2) Weapon(s) of Mass Destruction 
WMD-DAC	WMD Decision Analysis Center 
WMDO-IM	Weapons of Mass Destruction Office & Incident Management 
WMO	World Meteorological Organization 
WO	1) Warrant Officer
	2) Work Order
WORM	Write Once - Read Many (CD-ROM Drive)
WP	1) Warning Point
	2) White Phosphorus
	3) Word Processing
WPS	1) Water Purification System 
	2) Wireless Priority Service/System 
	3) Word Processing System
WPT	Workforce Performance Training 
WRDA	Water Resources Development Act
WRIST	Weather Radar Identification of Severe Thunderstorms
WRM	War Reserve Material
WSEL	Water-Surface Elevation
WSR	Weather Surveillance Radar
WSSPC	Western States Seismic Policy Council
Wt	Weight
WG	1) Wage Grade
	2) Working Group
WTC	World Trade Center (obsolete)
WTO	World Trade Organization 
WVOES	West Virginia Office of Emergency Services
WWL	Wind/Water Line
WWMCCS	World Wide Military Command and Control System (obsolete; replaced by GCCS)
WWU	Watch and Warning Unit
WWW	World Wide Web
WYO	Write Your Own (Insurance, e.g., NFIP)
WYSIWYG	What You See Is What You Get
XDA	Existing Data Study
XEDO	Xedar Heat Detection Unit
XPA	Extent of Play Agreement
YCC	Youth Conservation Corps
yd	yard
YLD	1) Yield
	2) Young Lawyers Division
yr	year
Z	Zulu (UTC)
ZBB	Zero-Based Budgeting
ZECP	Zone Emergency Communications Planner
ZFP	Zone Forecast Product
ZONE A	Special Flood Hazard Area inundated by the 100-year flood; base flood elevations are not determined
ZONE A1 to A30	Special Flood Hazard Area inundated by the 100-year flood; base flood elevations are determined
ZONE AE	Special Flood Hazard Area inundated by the 100-year flood; base flood elevations are determined
ZONE AH	Special Flood Hazard Area inundated by the 100-year flood; flood depths of 1 to 3 feet (usually areas of ponding); base flood elevations are determined
ZONE AO	Special Flood Hazard Area inundated by the 100-year flood; with flood depths of 1 to 3 feet (usually sheet flow on the sloping terrain); average depths are determined.  For areas of alluvial fan flooding, velocities are also determined
ZONE AR	Special Flood Hazard Area that results from the decertification of a previously accredited flood protection system that is in the process of being restored to provide a 100-year or greater level of flood protection
ZONE A99	Special Flood Hazard Area inundated by the 100-year flood to be protected from the 100-year flood by a Federal flood protection system under construction;  base flood elevations are not determined
ZONE B	Area of 500-year flood; area subject to the 100-year flood with average depths of less than 1 foot or with contributing drainage area less than one square mile; and areas protected by levees from the base flood
ZONE C	Area determined to be outside the 500-year floodplain
ZONE D	Area in which flood hazards are undetermined
ZONE V	Special Flood Hazard Area inundated by the 100-year flood; coastal floods with velocity hazards (wave action); base flood elevations are not determined
ZONE VE	Special Flood Hazard Area inundated by the 100-year flood; coastal floods with velocity hazards (wave action); base flood elevations are determined
ZONE V1 to V30	Special Flood Hazard Area inundated by the 100-year flood; coastal floods with velocity hazards (wave action); base flood elevations are determined
ZONE X	If unshaded:  Area determined to be outside the 500-year floodplain
	If shaded: Area of 500-year flood; area subject to the 100-year flood with average depths of less than 1 foot or with contributing drainage area less than one square mile; and areas protected by levees from the base flood
ZULU	Indicates use of Universal Coordinated Time (Greenwich Mean Time) [affiliated with EPR, IAIP]
ZWA	Zonal Wind Anomaly