Schematic Abbreviations

==CODE COMPONENT==
*BT : Button
*C : Capacitor
*CN : Connector
*D : Diode
*F : Fuse
*L : Inductor
*PC : Power Capacitor
*PD : Power Diode
*PL : Power Inductor
*PQ : Power Transistor
*PR : Power Resistor
*PU : Power Integrated Circuit
*Q : Transistor
*R : Resistor
*T : Transformers
*U : Integrated Circuit/Bga Chip/Embedded Controller/Bios Ic,Etc
*X : Terminal Strips, Terminations, Joins Oscillator
*Y : Crystal
==Abbreviations==
*AC : Alternating current
*ACDRV : AC adapter to system-switch driver output
*ACDET/ACIN : AC Adapter Voltage Detector
*ACGOOD : Valid adapter detect logic
*ACN : AC Adapter current sense amplifier inverting input
*ACP : AC Adapter current sense amplifier non-inverting input
*ACOP : Input Over-Power Protection
*ACOV : Input Overvoltage Protection
*ADP+ : Adapter Positive Supply
*ADP_ID : Adapter Identity
*AGND : Analog Ground
*ALWP : Always On Power
*B+ : AC or Battery Power Rail For Power Circuit
*BATT : Battery
*BAT+ : Battery Power Rail For Power Circuit
*BAT_DRV : Battery FET Gate Driver
*BAT_V : Battery Voltage
*BOM : Bill Of Material Management
*BT_EN : Bluetooth Enable
*BYP : Bypass
*CHGEN : Charge Enable Active-Low Logic Input
*CIN : Input Capacitor
*CLK_EN : Clock Enable
*CRT : Cathode Ray Tube
*CSIN : Input Current Sense Amplifier Inverting Input
*CSIP : Input Current Sense Amplifier Non-Inverting Input
*DC : Direct Current
*DM :  DIMM Socket Memory Ddr
*DOCK : Docking Socket
*EC : Embedded Controller
*EC_ON : Embedded Controller Enable
*EMI : Electromagnetic Interference
*EN : Enable
*ENTRIP : Enable Terminal
*FSEL : Frequency Select Input
*GATE : Trigger Gate
*GND : Ground
*GP : Ground Pin
*GPI : General Power Input
*GPIO : General Purpose Input Output
*HDMI : High-Definition Multimedia Interface
*ID : Continuous Drain Current
*IDM : Pulsed Drain Current
*IIN : Operating Supply Current
*IIN(SHDN) : Shutdown Supply Current
*IIN(STBY) : Standby Supply Current
*IS : Continuous Source Current (Diode Conduction)
*IVIN : Battery Supply Current at VIN pin
*JP : Jumper Point
*KBC : Keyboard Controller
*LCDV : LCD Power
*LDO : Low-DropOut Regulator
*LGATE : Lower-side MOSFET Gate Signal
*LPC : Low Pin Count
*LVDS : Low-voltage Differential Signaling
*MBAT : Main Battery
*NB : North Bridge
*NC : Not Connected
*ODD : Optical Disc Drive
*PCI : Peripheral Component Interconnect
*PGOOD : Power Good Open-Drain Output
*PIR : Product Improved Record
*PSI# : Current Indicator Input
*PVCC : IC Power Positive Supply
*RSMRST# : Resume Reset
*RTC : Real Time Clock
*SB : South Bridge
*SHDN : Shutdown
*SYS_SDN : System Shutdown
*SPI : Serial Peripheral Interface
*TD : Death Time
*THRM : Thermal Sensor
*TMDS : Transition Minimized Differential Signaling
*TP : Test Point
*TPAD : Thermal Pad
*UVLO : Input Undervoltage Lock Out
*V : Power Rail
*V+ : Positive Voltage
*VADJ : Output Regulation Voltage
*VALW : Always On Power
*VALWP : VALW Pad
*VBAT : Battery Power
*VCCP : Chip Power
*VCORE : Processor Power Rail
*VDD : Control Power Supply
*VDDR : Power DDR (VDRAM/VRAM/VMEM)
*VDS : Voltage Drain Source
*VFB : Feedback Inputs Power
*VGS : Voltage Gate Sources
*VIN : Input Voltage Range
*VIN : Adapter Power Supply
*VL : Power Lock
*VL : Voltage Across The Load
*VL : Power Rail From Linear Regulator
*VOT : Volt Out
*VRAM : Power Memory
*VREF : Power References
*VS : Switch Power
*VS+ : Support Voltage Positive
*VSB : Standby Power Rail
*VSS : Signal Ground
*VSW : Power Switch
*VTT : Memory Termination Voltage
*VTERM : Memory Termination Voltage
*VUSB : Power USB
*VGFX/VGPU : Power Graphic Chip
Original source Badcaps