A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
| AC | Alternating Current (vs DC) |
| ACK | Acknowledge (logic signal) |
| ACIA | Asynchronous Communication Interface Adapter |
| ACL | Advanced CMOS Logic (as in 74ACL245) |
| A/D | Analog to Digital |
| AF | Audio Frequency |
| AFC | Automatic Frequency Control |
| AGC | Automatic Gain Control AI Artificial Intelligence |
| ALC | Automatic Level Control |
| ALU | Arithmetic Logic Unit |
| A/N | Alphanumeric |
| ANSI | American National Standards Institute |
| ARRL | American Radio Relay League |
| AS | Advanced Schottky (as in 74AS245) |
| ASIC | Application-Specific Integrated Circuit |
| ASK | Amplitude-Shift Keying |
| ATC | Air Traffic Control |
| AV | Audio/Visual |
| AVC | Automatic Volume Control |
| BASIC | Beginners' All-purpose Symbolic Instruction Code |
| BBD | Bucket Brigade Device |
| BCD | Binary Coded Decimal |
| BEV | Billion Electron Volts |
| BIFET | BIpolar Field-Effect Transistor |
| BNC | Baby N Connector |
| BPI | Bits Per Inch |
| BPS | Bits Per Second |
| BTW | By The Way B&W Black & White (TV) |
| BW | BandWidth |
| CAD | Computer Assisted Design |
| CADA | Computer Assisted Design and Analysis |
| CADD | Computer Assisted Design and Development |
| CAE | Computer Assisted Engineering |
| CAM | Computer Assisted Manufacturing |
| CAN | CANcel |
| CAS | Column-Address Strobe (logic signal) |
| CATV | CAble TeleVision |
| CB | Citizens' Band |
| CBI | Complementary Binary |
| CC | Constant Current |
| CCD | Charge Coupled Device (used in cameras) |
| CCITT | International Telegraphy and Telephony Consultative Committee |
| CCTV | Closed Circuit TeleVision |
| CCW | Counter Clock-Wise |
| CD | Compact Disk |
| CD-I | Compact Disk - Interactive |
| CD-ROM | Compact Disk - Read Only Memory |
| CECL | Cascode Emitter-Coubled Logic |
| CEMF | Counter ElectroMotive Force |
| CerDIP | Ceramic Dual Inline Package |
| CES | Consumer Electronics Show |
| CF | Center Frequency |
| CFM | Cubic Feet per Minute |
| CISC | Complex Instruction Set Computer (vs RISC) |
| CL | Current Loop |
| CMOS | Complementary Metal Oxide Semiconductor |
| CP/M | Control Program for Microcomputers (operating system) |
| CPI | Character Per Inch |
| CPU | Central Processing Unit |
| CRC | Cyclic Redundancy Check (error detection scheme) |
| CRT | Cathode Ray Tube (TV/Monitor display, vs LCD) |
| CS | Control Strobe (logic signal) |
| CSA | Canadian Standards Association (UL's Canadian counterpart) |
| CTC | Counter/Timer Circuit |
| CTS | Clear To Send (protocol signal) |
| CV | Constant Voltage |
| CVT | Constant Voltage Transformer |
| CW | ClockWise |
| D/A | Digital to Analog |
| DAC | Digital to Analog Converter | Data Acquisition and Control |
| DARPA | Defense Advanced Research Projects Agency |
| DAV | Data AValiable | DatA Valid (logic signal) |
| dB | deciBel |
| DBA | DeciBels - Adjusted |
| DBK | DeciBels - referred to 1 Kilowatt |
| dBM | DeciBels - above or below 1 milliwatt |
| DBV | DeciBels - Voltage |
| DBX | DeciBels - above reference coupling |
| DC | Direct Current (vs AC) |
| DCD | Data Carrier Detect (protocol signal) |
| DES | Data Encription Standard |
| DIAC | Bilateral trigger diode |
| DIL | Dual In Line |
| DIN | Deutsche Industrie Normenausschuss |
| DIP | Dual Inline Package |
| DLC | Dual-Layer Capacitor |
| DMA | Direct Memory Access |
| DMM | Digital MultiMeter |
| DOD | Department of Defense |
| DOS | Disk Operating System |
| DOT | Department of Transportation |
| DP | Data Processing |
| DPDT | Dual Pole Dual Throw (as in a switch) |
| DPI | Dots Per Inch (as in resolution) |
| DPST | Dual Pole Single Throw (as in a switch) |
| DRAM | Dynamic Random Access Memory |
| DS | Data Strobe (logic signal) |
| DSO | Digital Storage Oscilloscope |
| DSP | Digital Signal Processing |
| DTL | Diode Transistor Logic (predecessor of TTL) |
| DTMF | Dual Tone Multi-Frequency (aka Touch Tones(tm)) |
| DTR | Data Terminal Ready (protcol signal) |
| DVM | Digital Volt-Meter |
| E2PROM | Electricaly Erasable Programmable Read Only Memory |
| EAPROM | Electricaly Alterable Read Only Memory |
| EBCDIC | Extended Binary Coded Decimal Interchange Code |
| ECC | Error Checking and Correction |
| ECL | Emitter Coupled Logic |
| EEPROM | Electricaly Erasable Programmable Read Only Memory |
| EGA | Enhanced Graphics Adapter |
| EIA | Electronics Industries Association |
| EL | ElectroLuminescent |
| ELF | Extremly Low Frequency |
| EMF | ElectroMotive Force |
| EMI | ElectroMagnetic Interference |
| EMP | ElectroMagnetic Pulse |
| ENIAC | Electronic Numerical Integrater and Computer (aka first computer) |
| EOT | End Of Transmission (protocol signal) |
| EPLD | Electricaly Programmable Logic Device |
| EPROM | Electricaly Programmable Read Only Memory (UltraViolet erased) |
| EQ | EQualizer |
| ESA | European Space Agency |
| ESD | Electrostatic Sensitive Device (aka CMOS :-) |
| ESR | Equivalent Series Resistance |
| EV | Electron Volt |
| F | Farad (measure of capacitance) |
| FAA | Federal Aviation Administration |
| FAST | Fairchild Advanced Schottky TTL (as in 74F245) |
| FAX | Facsimile FCC Federal Communications Commision |
| FDC | Floppy Disk Controller |
| FET | Field Effect Transistor |
| FF | Flip Flop |
| FFT | Fast Fourier Transform |
| FIFO | First In First Out |
| FILO | First In Last Out |
| FM | Frequency Modulation |
| FORTRAN | FORmula TRANslation |
| FP | Floating Point |
| FPLA | Field Programmable Logic Array |
| FPU | Floating Point Unit |
| FSK | Frequency-Shift Keying |
| FTP | File Transfer Protocol |
| FUBAR | Fouled/F***ed Up Beyond Any Recognition/Repair |
| FVC | Frequency to Voltage Converter |
| GA | Gate Array |
| GAL | Generic Array Logic |
| GCS | Gate Controller Switch |
| GFCI | Ground Fault Circuit Interrupter |
| GFI | Ground Fault Interrupter |
| GFLOPS | Billions of FLOating Point operations per Second |
| GIGO | Garbage In Garbage Out |
| GND | GrouND |
| GPIB | General Purpose Interface Bus |
| GPS | Global Positioning System |
| HAL | Hardwired Array Logic |
| HC | High speed Cmos (as in 74HC245) |
| HCT | High speed Cmos with Ttl thersholds (as in 74HCT245) |
| HD | High Density |
| HDC | Hard Disk Controller |
| HDTV | High Definition TeleVision |
| HDX | Half DupleX |
| HER | High Efficiency Red (as in a LED) |
| HET | Hetetodyne |
| HF | High Frequency |
| HFS | Hierarchical File System |
| HIC | Hybrid Integrated Circuit |
| HP | Hewlett Packard (company) | Horse Power |
| HPIB | Hewlett Packard Interface Bus |
| HPIL | Hewlett Packard Interface Loop (as in HP41CX calculator) |
| HTL | High Threshold Logic |
| HVDC | High Volatage Direct Current |
| HVPS | High Volatage Power Supply |
| Hz | Hertz (cycles per second) |
| I2ICE | Integrated Instrumentation and InCircuit Emulation |
| IA | Instrumentation Amplifier |
| IC | Integrated Circuit |
| ICE | InCircuit Emulation |
| IEEE | Institute of Electrical and Electronics Engineers |
| IF | Intermediate Frequency |
| IGFET | Insulated Gate Field Effect Transistor |
| IMHO | In My Humble Opinion |
| IMNHO | In My Not so Humble Opinion |
| IOB | Input/Output processor |
| IP | Interface Processor |
| IR | Current/Resistance | InfraRed |
| IRED | InfraRed Emitting Diode |
| ISA | Instrument Society of America |
| ISN | Information Systems Network |
| ISO | In Search Of |
| JEDEC | Joint Electron Device Engineering Council |
| JFET | Junction Field Effect Transistor |
| JIS | Japanese Industrial Standard |
| JPL | Jet Propulsion Laboratory |
| JUG | Joint Users Group |
| K | Kilo (1000 units) |
| KA | KiloAmpere (1000A) |
| KBPS | KiloBits Per Second |
| KEV | Kilo Electron Volts |
| KHz | Kilo Hertz (1000 cycles per second) |
| KVA | Kilo Volt Amperes |
| KWH | Kilo Watt Hours |
| L | Inductance |
| L2FET | Logic Level Field Effect Transistor |
| LAN | Local Area Network |
| LASCR | Light Activated Silicon Controlled Rectifier |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| LC | Inductance and Capacitance |
| LCD | Liquid Crystal Display |
| LCM | Least/Lowest Common Multiple |
| LD | Line Driver |
| LED | Light Emitting Diode |
| LF | Low Frequency |
| LIFO | Last In First Out |
| LISP | LISt Processing (language) |
| LO | Local Oscillator |
| LORAN | LOng RAnge Navigation |
| LP | Low Pass |
| LPC | Linear Predictive Coding |
| LPM | Lines Per Minute |
| LPT | Line PrinTer (port - aka parallel port - of IBM PC fame) |
| LSB | Least Significant Bit |
| LSD | Least Significant Digit |
| LSI | Large Scale Integration |
| LUT | Look Up Table |
| LW | Long Wave |
| MB | MegaBytes (1024 * 1024 bytes) |
| MBPS | Million Bytes Per Second |
| MCA | Micro Channel Architecture (IBM PS/2's bus) |
| MCU | MicroComputer Unit |
| MDAC | Multiplying Digital to Analog Converter |
| MECL | Motorola Emitter Coupled Logic |
| MFLOPS | Millions of FLOating Point operations per Second |
| MFM | Modified Frequency Modulation |
| MHz | MegaHertz |
| MIDI | Music Instrument Digital Interface |
| MIL | MILitary |
| MIPS | Millions of Instructions Per Second |
| MMU | Memory Management Unit |
| MO | Master Oscillator |
| MOS | Metal Oxide Semiconductor |
| MOSFET | Metal Oxide Semiconductor Field Effect Transistor |
| MOV | Metal Oxide Varistor |
| MPU | Main Processing Unit |
| MR | Magnetic Resonance |
| MS-DOS | MicroSoft Disk Operating System |
| MSB | Most Significant Bit |
| MSD | Most Significant Digit |
| MSI | Medium Scale Intergration |
| MTBF | Mean Time Between Failures |
| MTS | Multichannel Television Sound (aka Stereo TV) |
| MUX | Multiplexer |
| NASA | National Aeronautics and Space Administration |
| NC | Not Connected (pin) | Normally Closed (switch/relay) |
| NEDA | National Electronics Distributors Association |
| NEMA | National Electrical Manufacturers Association |
| NF | NanoFarad (measure of capacitance) |
| NFS | Network File Server |
| NiCad | Nickel Cadmium (rechargable battery) TM of Saft America |
| NMOS | N-channel Metal Oxide Semiconductor |
| NMR | Nuclear Magnetic Resonance |
| NO | Normally Open (switch/relay) |
| NOAA | National Oceanic and Atmospheric Administration |
| NORAD | NORth American Defense |
| NPN | Negative Positive Negative (as in 2N2222 transistor) |
| NPO | Negative Positive 0 temperature coefficient (cermaic capacitors) |
| NPR | Nations Public Radio |
| NRZ | Non Return to Zero |
| NRZI | Non Return to Zero Invert |
| NSB | National Science Board |
| NSF | National Science Foundation |
| NSPE | National Society of Professional Engineers |
| NT | Network Terminator |
| NTC | Negative Temperature Coefficient |
| NTSC | National Television Systems Committee (Never The Same Color twice :-) |
| OC | Open Collector |
| OCR | Optical Character Recognition |
| OEM | Original Equipment Manufacturer |
| OS | Operating System |
| OSCAR | Orbiting Satellite Carrying Amateur Radio |
| OSHA | Occupational Safety and Health Administration |
| OTDR | Optical Time Domain Reflectrometry |
| OTOH | On The Other Hand |
| OTP | One Time Programmable (as in PROM or plastic EPROM) |
| OVP | Over Voltage Protection |
| PA | Power Amplifier | Public Address |
| PAL | Programmable Array Logic (TM of Monolithic Memories) |
| PBX | Perivate Branch eXchange |
| PC | Personal Computer | Printed Circuit | Program Counter |
| PCB | Printed Circuit Board |
| PCC | Plastic Chip Carrier |
| PCM | Pulse Code Modulation |
| PEC | PhotoElectric Cell |
| PF | Power Factor |
| PG | Power Gain |
| PGA | Pin Grid Array |
| PIA | Peripheral Interface Adapter |
| PIC | Priority Interrupt Controller | Prallax'es microcontroller name |
| PIV | Peak Inverse Voltage |
| PLA | Programmable Logic Array |
| PLCC | Plastic Leaded Chip Carrier |
| PLD | Programmable Logic Device |
| PLL | Phase Locked Loop |
| PM | Phase Modulation | Pulse Modulation |
| PNP | Positive Negative Positive (transistor) |
| POS | Point Of Sale |
| POV | Peak Operating Voltage |
| PPM | Parts Per Million |
| PPS | Pulses Per Second |
| PRN | Pseudo Random Noise |
| PROM | Programmable Read Only Memory |
| PSG | Programmable Sound Generator |
| PSI | Pounds per Square Inch (pressure) |
| PSK | Phase Shift Keying |
| PTT | Push To Talk (microphone) |
| PUT | Programmable Unijunction Transistor |
| PV | PhotoVoltaic |
| PWM | Pulse Width Modulation |
| PWR | PoWeR |
| QA | Quality Assurance |
| QC | Quality Control |
| QIC | Quarter Inch Cartridge |
| QIP | Quad Inline Package |
| QSM | Quad Surface Mount |
| R&D | Research and Development |
| RAD | Radiation Absorbed Dose |
| RADAR | RAdio Detection And Ranging |
| RAM | Random Access Memory |
| RAS | Row Address Strobe (logic signal) |
| RC | Radio Control | Resistance and Capacitance |
| RCV | ReCeiVe |
| RD | Receive Data | ReaD (logic signal) |
| RDA | Deceive Data |
| RDY | ReaDY |
| REM | Roentgen equivalent man |
| REP | Roentgen equivalent Physical |
| RET | RETurn |
| RF | Radio Frequency |
| RFI | Radio Frequency Interference |
| RGB | Red Green Blue |
| RH | Relative Humidity |
| RHDP | Right Hand Decimal Point |
| RISC | Reduced Instruction Set Computer (vs CISC) |
| RLC | Resistance Inductance Capacitance |
| RLG | Ring Laser Gyroscope |
| RMI | Radio Magnetic Interference |
| RMS | Root Mean Square |
| ROM | Read Only Memory |
| RPM | Revolutions Per Minute |
| RPN | Reverse Polish Notation (as in HP calculators) |
| RPS | Revolutions Per Second |
| RS | Reed Solomon (error correction) |
| RT | Real Time | Rise Time |
| RTD | Resistance Temperature Detector |
| RTI | Real Time Interrupt |
| RTL | Resistor Transistor Logic |
| RTOS | Real Time Operating System |
| RTS | Request To Send (protocol signal) |
| S/H | Sample and Hold |
| S/N | Signal to Noise (ratio) |
| SAW | Surface Acoustic Wave |
| SBC | Single Board Computer |
| SCA | SubCarrier Adapter |
| SCI | Serial Communication Interface |
| SCL | Serial CLock |
| SCR | Silicon Controller Rectifier |
| SCS | Silicon Controller Switch |
| SCSI | Small Computer System Interface |
| SDI | Strategic Defense Initiative |
| SEM | Scanning Electron Microscope |
| SEMI | Semiconductor Equipment and Materials Institute |
| SFC | polyStyrene Film Capacitor |
| SG | Signal Ground |
| SI | Systeme International (international system of units) |
| SIMM | Single Inline Memory Module |
| SIO | Serial Input and Output |
| SIPO | Serial In Parallel Out |
| SLC | Sigle Layer Ceramic (capacitor) |
| SM | Surface Mount |
| SMD | Surface Mount Device |
| SNR | Signal to Noise Ratio |
| SO | Serial Output | Small Outline | Significant Other |
| SOIC | Small Outline Integrated Circuit |
| SOJ | Small Outline J-leaded (chip package) |
| SOLV | SOLenoid Valve |
| SONAR | SOund NAvigation and Ranging |
| SOP | Small Outline Package |
| SP | Signal Processor | Stack Pointer |
| SPDT | Single Pole Double Throw (switch) |
| SPI | Serial to Parallel Interface |
| SPICE | Simulation Program with Integrated Circuit Emphasis |
| SPL | Sound Pressure Level |
| SPST | Single Pole Single Throw (switch) |
| SQL | Structured Query Language (for databases) |
| SR | Shift Register |
| SRAM | Static Random Access Memory |
| SSB | Single SideBand |
| SSI | Small Scale Integration |
| SSR | Solid State Relay |
| SSTV | Slow Scan TeleVision |
| SW | Short Wave |
| T/H | Track and Hold |
| TC | Temperature Coefficient |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TD | Tunnel Diode |
| TDD | Telecomunication Devices for the Deaf |
| TEM | Transverse Electromagnetic (wave) |
| TF | Transfer Function |
| TFD | Thin Film Detector |
| TFEL | Thin Film ElectroLuminescent |
| TFT | Thin Film Transistor |
| THD | Total Harmonic Distortion |
| THz | TetraHertz |
| TIG | Tungsten Inert Gas |
| TM | Transverse Magnetic (wave) |
| TR | Transient Response |
| TS | Time Sharing |
| TTL | Transistor Transistor Logic |
| TV | TeleVision |
| TWT | Traveling Wave Tube |
| UART | Universal Asynchronous Receiver/Transmitter uF micro Farad (measure of capacitance) |
| UHF | Ultra High Frequency |
| UHV | Ultra High Vacuum |
| UJT | UniJunction Transistor |
| UL | Underwriters Laboratories |
| ULSI | Ultra Large Scale Integration |
| UPC | Universal Product Code |
| UPS | Uninterruptible Power Supply |
| USART | Universal Synchronous/Asynchronous Receiver/Transmitter |
| UTC | Universal Time Code |
| UV | UltraViolet |
| UVA | UltraViolet Alpha |
| UVB | UltraViolet Beta |
| VA | Volt Ampere |
| VAC | Volts Alternating Current |
| VAR | VARiable |
| VCC | Supply Voltage - positive |
| VCD | Variable Capacitance Diode |
| VCO | Voltage Controlled Oscillator |
| VCR | Video Cassette Recorder |
| VDC | Volts Direct Current |
| VDD | Supply Voltage - negative |
| VF | Vacuum Fluorecent |
| VFC | Voltage to Frequency Converter |
| VFO | Variable Frequency Oscillator (vs a crystal oscillator) |
| VHF | Very High Frequency |
| VLF | Very Low Frequency |
| VLSI | Very Large Scale Integration |
| VLT | Video Look up Table |
| VOL | VOLume |
| VOM | Volt OhmMeter |
| VOX | Voice Operated transmit ("trans" = X as in "Xmitter") |
| VR | Voltage Regulator |
| VRAM | Video Random Access Memory (aka Very fast RAM) |
| VS | Vertical Sync |
| VSS | Supply Voltage - Negative |
| VT | Virtual Terminal |
| VTM | Voltage Tunable Magnetron |
| VTVM | Vacuum Tube Volt Meter |
| VXO | Variable crystal Oscilator |
| WACK | Wait before ACKowledge |
| WDT | Watch Dog Timer |
| WHR | Watt HouR |
| WP | Word Processor |
| WPM | Words Per Minute |
| WR | WRite (logic signal) |
| WV | Working Voltage |
| WW | Wire Wound | Wire Wrap |
| XMT | TransMiT |
| XTAL | crysTAL |
| YAG | Yttrium Aluminum Garnet (laser) |
| YIG | Yttrium Iron Garnet |
| ZD | Zero Defects |
| ZIF | Zero Insertion Force |
| ZIP | Zigzag Inline Package | Compression scheme |
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