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Well, since some of you guys might be a little lost with the acronyms (abbreviations) we use to describe some things regarding our vehicles, I figured I'd start a post with some common ones. Feel free to add on if you have some that I missed...

+ -postive
- -negative
40/20/40- a bench seat divided 40% on the driver's side, 20% in the center, and 40% on the passenger's side
60/40- a bench seat that is divided with 40% on the driver's side and 60% on the passenger's side
A- amperes (or amps for short)
ABS- Anti-Lock Brakes
AC- alternating current
A/C - Air Conditioning
ACCS - A/C Cycling Switch
ACC - A/C Clutch Compressor
ACD - Air Conditioning Demand
A/C on - Air Conditioning ON circuit
ACP - Air Conditioning Pressure
ACT - Air Charge Temperature sensor
ACV- Thermactor Air Control Valve
A/C WOT - Air Conditioning WOT off relay
ADC - Analog to Digital Converter
ADJ - Adjust
A/D - Analog to Digital
A/F - Air to Fuel Ratio
AFC - Air Fuel Control (12v cummins diesel)
AFR - Air to Fuel Ratio
AFM - Air/Fuel Meter
AIR - Secondary Air Injection / Thermactor
AIRB - Secondary Air injection Bypass
AIRD - Secondary Air injection Diverter
ALDL - a$$embly Line Diagnostic Link
ALT - Alternator
AM- amplification modulation
AM1 - Thermactor Air Bypass solenoid valve (TAB)
AM2 - Thermactor Air Diverter solenoid valve (TAD)
AOD - Automatic Overdrive transmission
AODE - Automatic Overdrive Electronic transmission
AODE-W - Automatic Overdrive Electronic Wide-ratio transmission
APPS - Accelerator Pedal Position Sensor
ARC - Automatic Ride Control
A/T - Automatic Transmission/Transaxle
AT- automatic transmission or all terrain
ATDC - After Top Dead Center
AXOD - Automatic Transaxle Overdrive
AVOM - Analog Volt-Ohm Meter ABS- anti-lock braking
B+ - Battery Positive Voltage
BATT+ - Battery Positive Voltage
BARO - Barometric Pressure
BDC - Bottom Dead Center
BFG- BF Goodrich
BFH- big f#@$ing hammer
BHAF- Big honkin' air filter
Bias- usually referrring to bias ply tires or non-radial tires, but it could also mean to urge or give favortism to something like in a biasing block
BL- body lift
BLR - Blower
BOO - Brake On/Off switch
BP - Barometric Pressure sensor
BPA - Bypass Air
BPE - Bar Pin Eliminator
BTDC - Before Top Dead Center
BTU- British Thermal Unit
C&C- Cab and chassis
CAC - Charge Air Cooler (intercooler)
CAD- central axle disconnect
CAI- cold air intake (sometimes called an "FIPK" or fuel injection performance kit by K&N)
cat- catalytic converter (eg, cat-back refers to exhaust kits that start at the catalytic converter and go to the back of the vehicle)
CANP - Canister Purge solenoid
CBD - Closed Bowl Distributor
CC- cruise control, crew cab, or cubic centimeters
CCC - Converter Clutch Control
CCD - Computer Controlled Dwell
CCO - Converter Clutch Override
CCRM - Constant Control Relay Module
CCS - Coast Clutch Solenoid
CD- compact disc
CDEW- Cold Drawn, Electric Welded (seamed) Tubing
CEL - Check Engine Light
CFI - Central Fuel Injection
CFM- Cubic Feet Per Minute
CID - Cylinder Identification sensor / Cubic Inch Displacement
CJ- 40s to 86 Jeeps from Cj-2As, 3As, 5,6,7, and CJ8 Scramblers.
CKP - Crankshaft Position
CKT - Circuit
CM - Continues Memory
CMP - Camshaft Position
CO - Carbon Monoxide
CO2 - Carbon Dioxide
COG - Center of Gravity
CPI- Central Port Injection
CPP - Clutch Pedal Position
CPS - Crankshaft Position Sensor
CSE GND - Case Ground
CTD- Cummins Turbo Diesel
CTS - Coolant Temp Sensor
D44- Dana 44
D60- Dana 60
D70- Dana 70
D80- Dana 80
DAC - Digital to Analog Converter
DC- direct current
DC- Dick Cepek
DCEP - Direct current Electrode positive (welding)
DCRP - Direct current reverse polarity (welding)
DI - Distributor Ignition
DIS - Distributorless Ignition System
DJ-early postal jeeps
DLC - Data Link Connector
DOHC - Dual Overhead Cam
DOL - Data Output Line
DOM- Drawn Over Mandrel (seamless) Tubing
DPFE - Delta Pressure Feedback EGR
DPDIS - Dual Plug Distributorless Ignition System
DPI - Dual Plug Inhibitor
DRE - Draglink end
DRW- dual rear wheels
Dshaft- drive shaft
DTC - Diagnostic Trouble Code
DTM - Diagnostic Test Mode
DV- delivery valve(s) (cummins diesel)
DVOM - Digital Volt/Ohm Meter
E4OD - Electronic 4-Speed Overdrive
EAIR - Electronic Secondary Air Injection
EAP - Electronic Air Pump
EC- extended cab
ECA - Electronic Control a$$embly
ECM - Electronic Control Module
ECT - Engine Coolant Temperature sensor
ECU - Electronic Control Unit
EDF - Electric Drive Fan relay a$$embly
EDIS - Electronic Distributorless Ignition System
EEC - Electronic Engine Control
EEC-IV - Ford’s fourth generation EEC system
EED - Electronic Engine Control
E-fan - Electric Cooling Fan
EFI - Electronic Fuel Injection
EGO - Exhaust Gas Oxygen sensor
EGR - Exhaust Gas Recirculation system
EGRC - EGR Vacuum Control solenoid
EGRV - EGR Vent solenoid or system
EGT - Exhaust Gas Temperature
EI - Electronic Ignition
EPC - Electronic Pressure Control
EPT - EGR Pressure Transducer
ER - Engine Running
EVP - EGR Valve Position sensor
EVR - EGR Vacuum Regulator
EVTM - Electrical & Vacuum Trouble Shooting Manual
FASS - Fuel Air Separation System
FC - Fan Control
FF - Flexible Fuel
FF- full-floating (ie, a rear axle that displace the load onto the axle housing) typically much stronger than a SF rear
FFS - Flexible Fuel Sensor
FFV - Flexible Fuel Vehicle
FI - Fuel Injector or Fuel Injection
FM- frequency modulation
FMEM - Failure Mode Effects Management
FMU - Fuel Management Unit
FP - Fuel Pump
FPM - Fuel Pump Monitor
FPR - Fuel Pressure Regulator
FPRC - Fuel Pressure Regulator Control
FSJ-full size jeep/trucks
FTO - Filtered Tach Output
Fuel pump primary circuit - relay control side (85-86)
Fuel pump secondary circuit - relay power side (30-87)
ft*lb- foot pounds or pound feet (can be denoted lb*ft since multiplication is commutative) it is a measurement unit for torque
FWAL - front wheel anti-lock (ABS for front axle only)
GCM - Governor Control Module
GEN - Generator / Alternator
GH's - Ground Hawg Tires
GND - Ground
GM- General Motors
GRD- electrical ground (ie, 0 volts)
GRND - Ground
GSK - Governor Spring Kit (12v cummins diesel)
GT- Gran Turismo or in english "grand touring"
GTAW - Gas Tungsten Arc Welding = TIG
GTO- Gran Turismo Omologato or in english "homologated grand touring"
GVW - Gross Vehicle Weight
GVWR- gross vehicle weight rating
HC - Hydrocarbon
HEDF - High Speed Electro Drive Fan
HEGO - Heated EGO sensor
HEGO G - HEGO Ground circuit
HFC - High Fan Control
HFP - High Fuel Pump
HLOS - Hardware Limited Operating Strategy
HSIA - High Speed Inlet Air
HO - High Output
HP- horsepower
HP- High Pinion
HPD44- High Pinion Dana 44
HPD60- High Pinion Dana 60
HREW- Hot Rolled, Electric Welded (seamed) Tubing
HSC - High Swirl Combustion
I6- inline six cylinder engine, straight six
IAC- idle air controller (sometimes called an "ISC" or idle speed controller)
IAB - Idle Air Bypass
IAC - Intake Air Control
IAC - Idle Air Control
IAS - Idle Air Solenoid
IAT - Intake Air Temp
ICM - Ignition Control Module
IDM - Ignition Diagnostic Monitor
IFS- independent front suspension
IFS - Inertia Fuel Shutoff Switch
IGN - Ignition system or circuit
IGN GND - Ignition Ground
IMRC - Intake Manifold Runner Control
INJ - Injector or Injection
IRS- independent rear suspension
IS - Inertia Switch (fuel cutoff)
ISC - Idle Speed Control
ITS - Idle Tracking Switch
KAM - Keep Alive Memory
KAPWR - Keep Alive Power
KDP - Killer Dowel pin (12v cummins diesel)
KJ- Liberty
KOEO - Key On Engine Off
KOER - Key On Engine Running
KS - Knock Sensor
L - Liter(s)
LB- long bed (eg, 8ft box)
LFC - Low Fan Control
LFP - Low Fuel Pump
LJ - Jeep Wrangler Unlimited (unofficially)
LOS - Limited Operation Strategy
LP - Lift Pump
LP- Low Pinion
LUS - Lock-Up Solenoid
LSD - limited slip diff
MAF - Mass Air Flow sensor, meter or circuit
MAF RTN - Mass Air Flow Return
MAP - Manifold Absolute Pressure
MA PFI - Mass Air Sequential Port Fuel Injection system
MAPPA - Manifold Absolute Pressure Per Altitude
MAT - Manifold Air Temp sensor
MCU - Microprocessor Control Unit
MECS - Mazda Engine Control System
MFI - Multiport Fuel Injection
MIG- Metal Inert Gas (rolled, wire fed) Welding
MIL - Malfunction Indicator Light
MLP - Manual Lever Position
MLPS - Manual Lever Position Sensor
MLUS - Modulated Lock-Up Solenoid
MPFI - Multi Port Fuel Injection
MPI- multi port injection
MT- manual transmission or mud terrain
MT- Mickey Thompson
NC - Normally Closed
NDS - Neutral Drive Switch
NEG- negative side of an electrical element
NGS - Neutral Gear Switch
NPS - Neutral Pressure Switch
NO - Normally Open
N2O - Nitrous Oxide
NOx - Nitrogen Oxides
NOS - Nitrous Oxide
NV4500 - New Venture 4500 (5 speed manual trans common to many different makes of vehicles)
NV5600 - New Venture 5600 (Six speed manual common to many diff. makes of vehicles)
O2- oxygen
O2S - Oxygen Sensor
OBA- on board air
OBD- on board diagnostics (vehicles typically have a type OBDi or OBDii system, but there is an OBDiii system that includes radio communications interface)
OD- overdrive
OCC - Output Circuit Check
OCT - Octane
OCT ADJ - Octane Adjust
OHC - Over Head Camshaft (engine type)
ohms- a unit of resistance
OSC - Output State Check
PA - Pulsed Air Injection
PAIR - Pulsed Secondary Air Injection
PCM - Powertrain Control Module
PCV - Positive Crankcase Ventilation
PFE - Pressure Feedback EGR sensor or circuit
PFI - Port Fuel Injection
PIP - Profile Ignition Pickup
PITA- pain in the a$$
PL- power locks
PLCC - Plastic Leadless Chip Carrier
PNP - Park / Neutral Position
POS- piece of shiot or denoting the positive side of an electrical element
Posi - see LSD
PSD - Powerstroke Diesel
PSP - Power Steering Pressure
PSPS - Power Steering Pressure Switch
PSOM - Programmable Speedometer/Odometer Module
PTO - Power Take Off
PW- power windows
PW - Pulse Width
PWM - Pulse Width Modulated
PWR - Power
PWR GND - Power Ground circuit
QC- quad cab
RABS - Rear Antilock Brake System
RC- regular cab
RM - Relay Module
RPM - Revolutions Per Minute
R/T- rallye trim or road & track
RTN - Return
RWAL - rear wheel anti-lock (ABS for rear axle only)
RWD - Rear Wheel Drive
S100 -splice identification
SAE- society of automotive engineers
SAS- solid axle swap
SAW - Spark Angle Word
SB- short bed (eg. 6ft box)
SBC - Small Block Chevy
SC - Super Charged (engine type)
SD - Speed-Density
Seep- Sinking Jeep
SEFI - Sequential Electronic Fuel Injection
SF- semi-floating (ie, a rear axle that displace the load onto the axle bearings and shafts)
SFA- solid front axle
SL- suspension lift
SFI - Sequential Fuel Injection
SIG - Signal
SIG RTN - Signal Return circuit
SIL - Shift Indicator Light
SHO - Super High Output
SMAW-Shielded Metal Arc Welding (aka arc welding or stick welding)
SOA- spring over axle
SPFI - Sequential Port Fuel Injection
SPOUT - Spark Output Signal from EEC
SRS- supplemental restraint system (eg, airbags)
SRE - Spherical rod-end (heim)
SRW- single rear wheel
SS- super sport
SS - Shift Solenoid circuit
STAR - Self Test Automatic Readout (test equipment)
ST - Scan Tool
ST - Self Test
STI - Self Test Input circuit
STO - Self Test Output circuit TBI- throttle body injection
SYE - Slip Yoke Eliminator
TACH - Tachometer
TAB - Thermactor Air Bypass solenoid valve (AM1)
TAD - Thermactor Air Diverter solenoid valve (AM2)
TB - Throttle Body
TBI - Throttle Body Injection
TC - Turbocharger
Tcase - transfer case
TCC - Torque Converter Clutch
TCIL - Transmission Control Indicator Lamp
TCM - Transmission Control Module
TCS - Transmission Control Switch
TDC - Top Dead Center
TFI - Thick Film Ignition system
TFT - Transmission Fluid Temperature
TGS - Top Gear Switch
THS - Transmission Hydraulic Switch
TIG- Tungsten Inert Gas (electrode & gun) Welding
TJ- 97-up jeep wranglers
TOT - Transmission Oil Temperature
TP - Throttle Position Sensor
TPI - Tuned Port Intake
TPOUT - Throttle Position Output
TPS - Throttle Position Sensor
TRE- Tie Rod End
TRD - Transmission Range Drive
TROD - Transmission Range Overdrive
TRL - Transmission Range Low
TRR - Transmission Range Reverse
TSS - Transmission Speed Sensor
TTB - Twin Traction Beam - type of Ford front suspension like a IFS.
TTS - Transmission Temperature Switch
TQ- torque
V- volts
VAF - Vane Air Flow sensor or circuit
VAF - Volume Air Flow
VAT - Vane Air Temperature
VBATT - Vehicle Battery Voltage
VCRM - Variable Control Relay Module
VECI - Vehicle Emission Control Information Label
VM - Vane Meter
VOM - Analog Volt/Ohm Meter
VCRM - Variable Control Relay Module
VPWR -Vehicle Power supply voltage (regulated 10-14 volts)
VR - Variable Reluctance
VREF - Voltage Reference (EEC supplied voltage = 5 volts)
VRS - Variable Reluctance Sensor
VSC - Vehicle Speed Control sensor or signal
VSD- vehicle systems data or variable speed drive
VSS - Vehicle Speed Sensor or signal
WAC - WOT A/C Cut-off switch or circuit
Willys/MB-original military
WJ- 99-2004 Jeep Grand Cherokees
WK- 2005- Grand Cherokees
WMS- Wheel Mounting Surface (ie. The flat surface that the wheel mounts against, typically the hub face or brake drum face. When measuring an axle it is typically done WMS to WMS, and gives the axle width not including wheel studs)
WOT - Wide Open Throttle
XJ- Jeep Cherokee ('84-up compact Cherokee)
XK- Jeep Commander
XM- a satellite radio company
YJ-late 87-95 jeep wranglers(square headlight)
ZJ- 94-98 Jeep Grand cherokees

That is all I can think of for the moment, but if you have more, feel free to post them up, and I'll keep adding them to the list.

Contributing members: chuckhines, ThatGuy, RamAford, steved, Big Blue Ram, Jason, Aziraphale, TinyTruck, fordI64x4, JeepnTX, greenhornet1986, Lee, Outlaw Fabrication, NickM, SuperFudge, SuperDave4x4, Recon, ThrillBilly, tx50cj3a, RolledToy, chevyman_4x4

:bigthumb: :bigthumb: :bigthumb:

Anything added below posted before the latest edit should be included in this list, and the contributor should be credited.

Latest edit: 5/11/06 @ 9:23AM
 

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R/T according to dodge would be Road and Track.

:bigthumb:
 

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CTD- Cummins Turbo Diesel
 

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1,063 Posts
TRE-tie rod end
 

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RC. Can't forget the regular cab. :bigthumb:
 

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SRE - Spherical rod-end (hiem)
RWAL - rear wheel anti-lock (ABS for rear axle only)
DRE - Draglink end
 

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Tubing:
DOM- Drawn Over Mandrel (seamless)
HREW- Hot Rolled, Electric Welded (seamed)
CDEW- Cold Drawn, Electric Welded (seamed)

Welding:
TIG- Tungsten Inert Gas (electrode & gun)
MIG- Metal Inert Gas (rolled, wire fed)
 

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Just a few more



ABS- Anti-Lock Brakes
A/C - Air Conditioning
ACCS - A/C Cycling Switch
ACC - A/C Clutch Compressor
ACD - Air Conditioning Demand
A/C on - Air Conditioning ON circuit
ACP - Air Conditioning Pressure
ACT - Air Charge Temperature sensor
ACV- Thermactor Air Control Valve
A/C WOT - Air Conditioning WOT off relay
ADC - Analog to Digital Converter
ADJ - Adjust
A/D - Analog to Digital
A/F - Air to Fuel Ratio
AFR - Air to Fuel Ratio
AIR - Secondary Air Injection / Thermactor
AIRB - Secondary Air injection Bypass
AIRD - Secondary Air injection Diverter
ALDL - a$$embly Line Diagnostic Link
ALT - Alternator
AM1 - Thermactor Air Bypass solenoid valve (TAB)
AM2 - Thermactor Air Diverter solenoid valve (TAD)
AOD - Automatic Overdrive transmission
AODE - Automatic Overdrive Electronic transmission
AODE-W - Automatic Overdrive Electronic Wide-ratio transmission
ARC - Automatic Ride Control
A/T - Automatic Transmission/Transaxle
ATDC - After Top Dead Center
AXOD - Automatic Transaxle Overdrive
AVOM - Analog Volt-Ohm Meter
B+ - Battery Positive Voltage
BATT+ - Battery Positive Voltage
BARO - Barometric Pressure
BDC - Bottom Dead Center
BLR - Blower
BOO - Brake On/Off switch
BP - Barometric Pressure sensor
BPA - Bypass Air
BTDC - Before Top Dead Center
CAC - Charge Air Cooler (intercooler)
CANP - Canister Purge solenoid
CBD - Closed Bowl Distributor
CCC - Converter Clutch Control
CCD - Computer Controlled Dwell
CCO - Converter Clutch Override
CCRM - Constant Control Relay Module
CCS - Coast Clutch Solenoid
CEL - Check Engine Light
CFI - Central Fuel Injection
CID - Cylinder Identification sensor
CKP - Crankshaft Position
CKT - Circuit
CM - Continues Memory
CMP - Camshaft Position
CO - Carbon Monoxide
CO2 - Carbon Dioxide
CPP - Clutch Pedal Position
CPS - Crankshaft Position Sensor
CSE GND - Case Ground
CTS - Coolant Temp Sensor
DAC - Digital to Analog Converter
DI - Distributor Ignition
DIS - Distributorless Ignition System
DLC - Data Link Connector
DOHC - Dual Overhead Cam
DOL - Data Output Line
DPFE - Delta Pressure Feedback EGR
DPDIS - Dual Plug Distributorless Ignition System
DPI - Dual Plug Inhibitor
DRW - Dual Rear Wheel Axle
DTC - Diagnostic Trouble Code
DTM - Diagnostic Test Mode
DVOM - Digital Volt/Ohm Meter
E4OD - Electronic 4-Speed Overdrive
EAIR - Electronic Secondary Air Injection
EAP - Electronic Air Pump
ECA - Electronic Control a$$embly
EEC - Electronic Engine Control
EEC-IV - Ford’s fourth generation EEC system
E-fan - Electric Cooling Fan
ECM - Electronic Control Module
ECT - Engine Coolant Temperature sensor
ECU - Electronic Control Unit
EDF - Electric Drive Fan relay a$$embly
EDIS - Electronic Distributorless Ignition System
EED - Electronic Engine Control
EFI - Electronic Fuel Injection
EGO - Exhaust Gas Oxygen sensor
EGR - Exhaust Gas Recirculation system
EGRC - EGR Vacuum Control solenoid
EGRV - EGR Vent solenoid or system
EGT - Exhaust Gas Temperature
EI - Electronic Ignition
EPC - Electronic Pressure Control
EPT - EGR Pressure Transducer
ER - Engine Running
EVP - EGR Valve Position sensor
EVR - EGR Vacuum Regulator
EVTM - Electrical & Vacuum Trouble Shooting Manual
FC - Fan Control
FF - Flexible Fuel
FFS - Flexible Fuel Sensor
FFV - Flexible Fuel Vehicle
FI - Fuel Injector or Fuel Injection
FMEM - Failure Mode Effects Management
FMU - Fuel Management Unit
FP - Fuel Pump
FPM - Fuel Pump Monitor
FPR - Fuel Pressure Regulator
FPRC - Fuel Pressure Regulator Control
FTO - Filtered Tach Output
Fuel pump primary circuit - relay control side (85-86)
Fuel pump secondary circuit - relay power side (30-87)
GCM - Governor Control Module
GEN - Generator / Alternator
GND - Ground
GRND - Ground
GVW - Gross Vehicle Weight
HC - Hydrocarbon
HEDF - High Speed Electro Drive Fan
HEGO - Heated EGO sensor
HEGO G - HEGO Ground circuit
HFC - High Fan Control
HFP - High Fuel Pump
HLOS - Hardware Limited Operating Strategy
HSIA - High Speed Inlet Air
HO - High Output
HSC - High Swirl Combustion
IAB - Idle Air Bypass
IAC - Intake Air Control
IAC - Idle Air Control
IAS - Idle Air Solenoid
IAT - Intake Air Temp
ICM - Ignition Control Module
IDM - Ignition Diagnostic Monitor
IFS - Inertia Fuel Shutoff Switch
IGN - Ignition system or circuit
IGN GND - Ignition Ground
IMRC - Intake Manifold Runner Control
INJ - Injector or Injection
IS - Inertia Switch (fuel cutoff)
ISC - Idle Speed Control
ITS - Idle Tracking Switch
KAM - Keep Alive Memory
KAPWR - Keep Alive Power
KOEO - Key On Engine Off
KOER - Key On Engine Running
KS - Knock Sensor
L - Liter(s)
LFC - Low Fan Control
LFP - Low Fuel Pump
LOS - Limited Operation Strategy
LUS - Lock-Up Solenoid
MAF - Mass Air Flow sensor, meter or circuit
MAF RTN - Mass Air Flow Return
MAP - Manifold Absolute Pressure
MA PFI - Mass Air Sequential Port Fuel Injection system
MAPPA - Manifold Absolute Pressure Per Altitude
MAT - Manifold Air Temp sensor
MCU - Microprocessor Control Unit
MECS - Mazda Engine Control System
MFI - Multiport Fuel Injection
MIL - Malfunction Indicator Light
MLP - Manual Lever Position
MLPS - Manual Lever Position Sensor
MLUS - Modulated Lock-Up Solenoid
MPFI - Multi Port Fuel Injection
NC - Normally Closed
NDS - Neutral Drive Switch
NGS - Neutral Gear Switch
NPS - Neutral Pressure Switch
NO - Normally Open
N2O - Nitrous Oxide
NOx - Nitrogen Oxides
NOS - Nitrous Oxide
O2S - Oxygen Sensor
OBD - On Board Diagnostics
OCC - Output Circuit Check
OCT - Octane
OCT ADJ - Octane Adjust
OHC - Over Head Camshaft (engine type)
OSC - Output State Check
PA - Pulsed Air Injection
PAIR - Pulsed Secondary Air Injection
PCM - Powertrain Control Module
PCV - Positive Crankcase Ventilation
PFE - Pressure Feedback EGR sensor or circuit
PFI - Port Fuel Injection
PIP - Profile Ignition Pickup
PLCC - Plastic Leadless Chip Carrier
PNP - Park / Neutral Position
PSP - Power Steering Pressure
PSPS - Power Steering Pressure Switch
PSOM - Programmable Speedometer/Odometer Module
PW - Pulse Width
PWM - Pulse Width Modulated
PWR - Power
PWR GND - Power Ground circuit
RABS - Rear Antilock Brake System
RM - Relay Module
RPM - Revolutions Per Minute
RTN - Return
RWD - Rear Wheel Drive
SAW - Spark Angle Word
SBC - Small Block Chevy
SC - Super Charged (engine type)
SD - Speed-Density
SEFI - Sequential Electronic Fuel Injection
SFI - Sequential Fuel Injection
SIG - Signal
SIG RTN - Signal Return circuit
SIL - Shift Indicator Light
SHO - Super High Output
SPFI - Sequential Port Fuel Injection
SPOUT - Spark Output Signal from EEC
SRW - Single Rear Wheel Axle
SS - Shift Solenoid circuit
STAR - Self Test Automatic Readout (test equipment)
ST - Scan Tool
ST - Self Test
STI - Self Test Input circuit
STO - Self Test Output circuit
TACH - Tachometer
TAB - Thermactor Air Bypass solenoid valve (AM1)
TAD - Thermactor Air Diverter solenoid valve (AM2)
TB - Throttle Body
TBI - Throttle Body Injection
TC - Turbocharger
TCC - Torque Converter Clutch
TCIL - Transmission Control Indicator Lamp
TCM - Transmission Control Module
TCS - Transmission Control Switch
TDC - Top Dead Center
TFI - Thick Film Ignition system
TFT - Transmission Fluid Temperature
TGS - Top Gear Switch
THS - Transmission Hydraulic Switch
TOT - Transmission Oil Temperature
TP - Throttle Position Sensor
TPI - Tuned Port Intake
TPOUT - Throttle Position Output
TPS - Throttle Position Sensor
TRD - Transmission Range Drive
TROD - Transmission Range Overdrive
TRL - Transmission Range Low
TRR - Transmission Range Reverse
TSS - Transmission Speed Sensor
TTB - Twin Traction Beam
TTS - Transmission Temperature Switch
VAF - Vane Air Flow sensor or circuit
VAF - Volume Air Flow
VAT - Vane Air Temperature
VBATT - Vehicle Battery Voltage
VCRM - Variable Control Relay Module
VECI - Vehicle Emission Control Information Label
VM - Vane Meter
VOM - Analog Volt/Ohm Meter
VCRM - Variable Control Relay Module
VPWR -Vehicle Power supply voltage (regulated 10-14 volts)
VR - Variable Reluctance
VREF - Voltage Reference (EEC supplied voltage = 5 volts)
VRS - Variable Reluctance Sensor
VSC - Vehicle Speed Control sensor or signal
VSS - Vehicle Speed Sensor or signal
WAC - WOT A/C Cut-off switch or circuit
WOT - Wide Open Throttle

:eyecrazy:
 

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PSD - Powerstroke Diesel

AFC - Air Fuel Control (12v cummins diesel)

DV / DV's - delivery valve(s) (cummins diesel)

GSK - Governor Spring Kit (12v cummins diesel)

KDP - Killer Dowel pin (12v cummins diesel)

NV4500 - New Venture 4500 (5 speed manual trans common to many different makes of vehicles)

NV5600 - New Venture 5600 (Six speed manual common to many diff. makes of vehicles)
 

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GTAW - Gas Tungsten Arc Welding = TIG

TIG - Tungsten Inert Gas

DCRP - Direct current reverse polarity (welding)

DCEP - Direct current Electrode positive (welding)
 

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APPS - Accelerator Pedal Position Sensor

+ -postive

- -negative

S100 -splice identification

LP - AKA Lift Pump.....for us diesel heads....
 
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