Full List

3D

3-Dimensional

4GL

Fourth Generation Language

5B6B

5 data Bits, 6 transmission Bits

16-QAM

16 (points) Quadrature Amplitude Modulation

A/D

Analog / Digital (converter)

AAAI

American Association for Artificial Intelligence

AAB

Auto Answer Back

AAL

ATM Adaptive Layer

ABA

American Banks Association

ABI

Application Binary Interface (Unix)

ABM

Asynchronous Balanced Mode

AC

Alternating Current (CA)

ACE

Advanced Computer Environment

ACIA

Asynchronous Communications Interface Adapter

ACK

ACKnowledge (char 06 - 06H)

ACM

Association for Computing Machinery

ACTA

American Carriers Telecommunication Association

ADC

Analog Digital Converter (A/D)

ADCCMP

Advanced Data Communications Control Procedures (ANSI X3.66)

ADPCM

Adaptive Differential Pulse Coded Modulation

ADSL

Asymmetrical Digital Subscriber Line

AEA

American Electronics Association

AFC

Automatic Frequency Control

AFNOR

Association Fran‡aise de NORmalization

AGC

Automatic Gain Control

AGC

Automatic Generation Control

AI

Artificial Intelligence

AIN

Advanced Intelligent Network

AKA

Also Known As

ALN

Adaptive Logic Network

ALU

Arithmetic and Logic Unit

AM

Amplitude Modulation

AM/FM

Automatic Mapping / Facility Management

AMI

Alternate Mark Inversion

AMPS

Advanced Mobile Phone System (TIA 553)

AMR

Automatic Meter Reading

ANI

Automatic Number Identification (tel)

ANOVA

ANalysis Of VAriance

ANSA

Advanced Network System Architecture

ANSI

American National Standards Institute (NY)

APD

Avalanche Photo Diode

API

Application Program Interface

APPC

Advanced Program to Program Communication (IBM)

APPN

Advanced Peer to Peer Networking (IBM)

ARCnet

Attached Resource Computer NETwork

ARO

After Receipt of Order

ARP

Address Resolution Protocol (Layer 3)

ARQ

Automatic Repeat reQuest

ASA

American Standards Association

ASAP

As Soon As Possible

ASCII

American Standard Code for Information Interchange (7 bits - ANSI - CCITT N¦ 5)

ASIC

Application Specific Integrated Circuit

ASK

Amplitude Shift Keying

ASME

American Society of Mechanical Engineers

ASN.1

Abstract Syntax Notation 1 (ISO 8824 8825)

AT

Apple Talk

AT

ATtention (Hayes Modems Command Prefix)

AT&T

American Telegraph & Telephone

ATE

Automatic Test Equipment

ATM

Asynchronous Transfer Mode (Cell-Switching, Fast Packet)

ATM

Automated Teller Machine

ATV

Advanced TeleVision

AUI

Attachment Unit Interface (Ethernet, 15-pin)

AVC

Automatic Volume Control

AWG

American Wire Gauge

B

B&W

Black and White (TV)

BACnet

Building Automation and Control NETwork

BABT

British Approval Board for Telecommunications

Balun

BALanced-UNbalanced

BASIC

Beginners' All-purpose Symbolic Instruction Code

BAW

Bulk Acoustic Wave

BBS

Bulletin Board Service

BCC

Block Check Character

BCD

Binary Coded Decimal

BCH

Bose Chaudhuri Hocquenguem (code)

BER

Bit Error Rate

BERT

Bit Error Rate Tester

BFT

Binary File Transfer

BGP

Border Gateway Protocol

BHC

Busy Hour Calls (tel)

BiCMOS

Bipolar Complementary Metal Oxide Silicon

B-ICI

Broad band Inter-Carrier Interface

BIL

Basic impulse Insulation Level

BIOS

Basic Input/Output System

B-ISDN

Broad band Integrated Services Digital Network

BISUP

Broad band ISdn User Part

BISYNC

BISYNChronous (BSC IBM)

bit

BInary digiT

BITNET

Because It's Time NETwork

BNC

Bayonet (Baby? ) Normalized Connector

BNF

Backus-Naur Form

BOF

Birds Of a Feather

bpi

Bits Per Inch

bps

Bits Per Second

BPSK

Binary Phase Shift Keying

BQFP

Bumpered Quad Flat Pack

BRA

Basic Rate Access

BRI

Basic Rate Interface (ISDN: 2x64+16 kbps)

BSC

Binary Synchronous Communication protocol (BISYNC - IBM)

BSD

Berkeley System Distribution (Unix)

BSI

British Standards Institution (London)

BSP

Binary Space Partition (tree)

BSS

Broad band Switching System

BZT

Bundesamt f’r Zulassungen in der Telekommunication (Germany)

C

C-MOS

Complementary Metal-Oxide Silicon

CAD

Computer Aided Design

CAI

Computer Aided Instruction

CAM

Computer Aided Manufacturing

CAM

Content Addressable memory

CAMAC

Computer Automated Measurement And Control

CAN

Controller Area Network (Bosch Intel)

CASE

Computer Aided Software Engineering

CAST

Computer Aided Software Testing

CAT

Computerized Axial Tomography

CATV

Community Antenna (CAble?) TeleVision

CB

Citizens Band

CBDS

Connectionless Broadband Data Service

CBR

Constant Bit Rate

CCD

Charge-Coupled Device

CCIR

Comit‰ Consultif International des Radiocomunications œ (ITU - Genˆve)

CCITT

Comit‰ Consultif International T‰l‰graphique et T‰l‰phonique œ (ITU - Genˆve)

CCS

Common Channel Signalling (SS7) (tel)

CCTV

Closed Circuit TeleVision

CD

Carrier Detect (V24)

CD

Compact Disc

CD-A

Compound Document Architecture

CD-R

Compact Disc Rewriteable

CD-ROM

Compact Disc Read Only Memory

CDDI

Copper Distributed Data Interface

CDE

Common Desktop Environment

CDMA

Code Division Multiple Access (Cellular, IS-95)

CDPD

Cellular Digital Packet Data

CEBus

Consumer Electronic Bus

CEPT

Conference Europ‰enne de Postes et T‰l‰communications

CERT

Computer Emergency Response Team (cert@cert.org - 412 268 7090)

cfm

Cubic Feet by Minute

CGI

Computer Generated Images

CGM

Computer Graphics Metafile

CHAP

Challenge Handshake Authentication Protocol

CHRL

Common Hardware R Platform (Power PC)

CIDR

Classless InterDomain Routing

CIE

Commission International de l'Eclairage (Paris)

CIF

Cargo, Insurance & Freight

CIGRE

Conference Internationale des Grandes Reseaux El‰ctriques (Paris)

CIM

Computer Integrated Manufacturing

CIPM

Comit‰ Internationale des Poids et Mesures (Paris)

CIR

Committed Information Rate

CIRC

Cross Interleaved Reed-salomon Code

CISC

Complex Instruction Set Computer

CITEL

Comision Interamericana de TELecomunicaciones

CLNP

ConnectionLess Network Protocol (ISO)

CLNS

Connection Less Network Service (ISO 8473)

CMIP

Common Management Information Protocol (ISO)

CMOS

Complementary Metal Oxide Semiconductor

CMRR

Common Mode Rejection Rate

CMYK

Cyan Magenta Yellow blacK

CNR

Carrier to Noise Ratio

COBOL

COmmon Business Oriented Language

CORBA

Common Request Object Broker Architecture

COS

Corporation of Open Systems (International)

CPE

Customer Premises Equipment

cpi

Characters Per Inch

cps

Characters Per Second

CPU

Central Processor Unit

CR

Carriage Return (char 13 - 0DH)

CRC

Cyclic Redundancy Check

CRCC

Cyclic Redundancy Check Character

CRT

Cathode Ray Tube

CSA

Canadian Standards Association (Rexdale)

CSMA/CD

Carrier Sense with Multiple Access/Collision Detection (Ethernet IEEE 802.3)

CSU

Channel Service Unit

CT

Cordless Telephony

CTD

Charge Transfer Device

CTI

Computer-Telephony Integration

CTIA

Cellular Telecommunications Industry Association

CTM

Centralized Technical Management

CTR

Common Technical Requirement (Europe)

CTS

Clear To Send

CW

Continuous Wave

D

D/A

Digital to Analog Converter (DAC)

DA(S)

Distribution Automation (System)

DAB

Digital Audio Broadcasting

DAC

Digital to Analog Converter (D/A)

DAMA

Demand Assigned Multiple Access

DAT

Digital Audio Tape

dB

DeciBel

dBm

DeciBels (relative to 1 mw)

DBMS

Data Base Management System

DBS

Direct Broadcast Satellite

DBS

Direct Broadcast Service

DBT

Deutsche Bundespost Telekom

DC

Direct Current

DCC

Digital Compact Cassette

DCE

Data Circuit-terminating Equipment

DCE

Distributed Computing Environment (OSF)

DCFL

Direct Coupled Field effect transistor Logic

DCML

Differential Current Mode Logic

DCN

Data Communications Network

DCS

Desktop Color Separation

DCS

Distributed Control System

DCS

Dynamic Channel Selection

DCT

Digital Cordless Telephone

DCT

Discrete Cosine Transform

DCTL

Direct Coupled Transistor Logic

DDCMP

Digital Data Communications Message Protocol (DEC)

DDD

Direct long Distance Dialing (tel)

DDE

Dynamic Data Exchange (MS Windows)

DDS

Digital Data System

DDS

Digital Data Standard (tapes)

DEA

Data Encryption Algorithm

DECNET

Digital Equipment Corporation NETwork

DECT

Digital European Cordless Telecommunications

DES

Data Encryption Standard (NBS)

DFR

Digital Fault (/transient) Recorder

DFT

Discrete Fourier Transform

DFSK

Double Frequency Shift Keying

DHCP

Dynamic Host Configuration Protocol

DID

Direct Inward Dialing

DIMM

Dual In line Memory Module

DIN

Deutsche Industrie Norm (Germany)

DIP

Dual In-line Package

DIU

Data Interface Unit

DIX

Digital Intel Xerox (Ethernet)

DIW

type D Inside Wire (STP)

DLC

Data Link Control (sub-layer 2)

DLC

Digital Loop Carrier

DLE

Data Link Escape (char 16 - 10H))

DLG

Digital Line Graph (vector map files format)

DLL

Dynamic Link Library (Windows)

DLSw

Data Link SWitching

DM

Delta Modulation

DMA

Direct Memory Access

DME

Distributed Management Environment

DMI

Desktop Management Interface

DMM

Digital MultiMeter

DMS

Distribution Management System

DMTF

Desktop Management Task Force

DNIC

Data Network Identification Code (X-121)

DNS

Domain Name System (Internet )

DO

Diode Outlook

DPDT

Double-Pole Double-Throw (switch)

dpi

Dots Per Inch

DPSK

Differential Phase Shift Keying

DQPSK

Differential Quaternary Phase Shift Keying

DQDB

Distributed Queue Dual Bus

DRAM

Dynamic Random Access Memory

DS-3

Digital Signalling level 3 (44.768 Mbps)

DS/CDMA

Direct Sequence CDMA

DS/SS

Direct Sequence Spread Spectrum

DSI

Digital Speech Interpolation

DSL

Digital Subscriber Line

DSM

Demand Side Management

DSO

Digital Storage Oscilloscope

DSP

Digital Signal Processing

DSS1

Digital Subscriber Signalling System 1 (tel)

DSU

Data Service Unit

DTE

Data Terminal Equipment

DTL

Diode-Transistor Logic

DTMF

Dual Tone MultiFrequency (signalling)

DTP

DeskTop Publishing

DTR

Data Terminal Ready

DTU

Data Terminal Unit

DVD

Digital Video (Versatile?) Disc

DVI

Digital Video Interactive (Intel)

DVM

Digital Volt Meter

DVST

Direct View Storage Tube

DXF

Drawing eXchange file Format

DXI

Data eXchange Interface

E

E&M

rEceive & transMit (telef, signalling) (Ear & Mouth?)

E1

European 1 (2048 bps, 30-channel PCM)

EBU

European Broadcast Union

EBCDIC

Extended Binary Coded Decimal Interchange Code (IBM)

EC

European Commission

EC

European Community

ECB

Electronic Code Book (DES)

ECG

ElectroCardioGram

ECL

Emitter-Coupled Logic

ECM

Electronic Counter Measures

ECMA

European Computer Manufacturers Association (Genˆve)

ECU

European Currency Unit

EDFA

Erbium Doped Fiber Amplifier

EDH

Electronic Data Handling

EDI

Electronic Data Interchange

EDIFACT

Electronic Data Interchange For Administration, Commerce and Trade

EDO

Extended Data Out (memory)

EDP

Electronic Data Processing

EDT

Eastern Daylight-saving Time

EEPROM

Electronically Erasable Programmable Read-Only-Memory

EFT

Electronic Funds Transfer

e.g.

Exempli Gratia

EGA

Enhanced Graphics Adapter

EGP

Exterior Gateway Protocol

EHV

Extra High Voltage

EIA

Electronic Industries Association (Washington)

EIRP

Effective Isotropic Radiated Power

EISA

Extended ISA (PC Bus - 32 bits)

EL

Electro-Luminiscent

ELD

Electro-Luminiscent Display

EM

Electro-Magnetic

EMC

Electro-Magnetic Compatibility

EMF

Electro-Motive Force

EMI

Electro-Magnetic Interference

EMP

Electro-Magnetic Pulse

EMR

Electro-Magnetic Radiation

EMS

Energy Management System

EMS

Expanded Memory Specification

EOF

End Of File

EOF

End Of Frame

EOP

End Of Packet

EOS

Electrical OverStress

EOT

End Of Transmission (char 4 - 04H)

EPA

Environment Protection Agency

EPP

Enhanced Parallel Port

EPRI

Electric Power Research Institute (Palo Alto)

EPROM

Erasable Programmable Read-Only-Memory

EPS

Encapsulated Post Script

EQ

Equipment Qualification

E-R

Entity-Relationship (diagram)

ERC

European Radio Commission

ERP

Effective Radiated Power

ESC

ESCape (char 027 - 1BH)

ESD

Electronic Software Distribution

ESD

ElectroStatic Discharge

ESDI

Enhanced Small Device Interface

ESN

Electronic Serial Number

ESPRIT

European Strategic Program for Research and development of Information Technology

EST

Eastern Standard Time

ETB

End of Text Block (char 023 - 17H)

ETC

Enhanced Throughput Cellular

ETSI

European Telecommunications Standards Institute (Cedex - F)

ETX

End of TeXt (char 3 - 03H)

EV

Electric Vehicle

eV

Electron Volt (1,602x10-19 J)

EVC

Enhanced Video Connector (VESA)

EXOR

EXclusive OR

F

FAQ

Frequently Asked Questions

FAT

File Allocation Table

FAX

FAcsimile

FBW

Fly By Wire

FC

Fibre Channel

FCC

Federal Communications Commission (Washington)

FCS

Frame Check Sequence

FD

Flexible (Floppy) Disk

FDDI

Fiber Distributed Data Interface (ISO 9314)

FDM

Frequency Division Multiplex

FDX

Full DupleX

FEA

Finite Elements Analysis

FEC

Forward Error Correction

FEP

Front End Processor

FERAM

Ferro Electric Random Access Memory

FET

Field Effect Transistor

FEXT

Far End cross Talk

FFT

Fast Fourier Transform

FH/SS

Frequency Hopping Spread Spectrum

FHP

Fractional Horse Power (motor)

FHT

Fast Hartley Transform

FIFO

First In, First Out

FIP

Factory Information Protocol

FIPS

Federal Information Processing Standard

FITL

Fiber In The Loop

FLAG

Fiber optic Link Around the Globe

FLC

Fuzzy Logic Control

FLOP

FLoating point OPeration

FLP

FLuorescent Panel

FM

Frequency Modulation

FOB

Free On Boards

FOIRL

Fiber Optic Inter Repeater Link (Ethernet - IEEE 802.3c .3d)

FOR

Forced Output Rate

FORTRAN

FORmula TRANslator

FOT

Fiber Optic Transceiver

FP

Flat Pack (SMD)

FP

Function Points

FPD

Flat Panel Display

FPDI

Flat Panel Display Interface

FPGA

Field Programmable Gate Array

FPU

Floating Point Unit

FR

Frame Relay

FRAD

Frame Relay Access Device

FSK

Frequency Shift Keying

FT1

Fractional T1

FTAM

File Transfer, Access and Management

FTP

File Transfer Protocol

FTP

Foiled Twisted Pair (ScTP)

FTTC

Fiber To The Curb

FTTH

Fiber To The Home

FTZ

Fernmelde Technischen Zentralamt (Darmstadt)

FWHM

Full-Width at Half Maxima

FYI

For Your Information

G

GaAs

GAlium ArSenide

GaAsP

GAlium ArSenide Phosphide

GaN

GAllium Nitride

GEO

Geosynchronous Earth Orbit

GIF

Graphics Interchange Format

GII

Global Information Infrastructure

GIGO

Garbage In, Garbage Out

GII

Global Information Infrastructure

GIS

Gas Insulated Switchgear

GIS

Geographical Information System

GKS

Graphical Kernel System

GMSK

Gaussian Minimum Shift Keying

GMT

Greenwich Meridian Time

GND

GrouND (0V)

GoS

Grade Of Service

GOSIP

Government OSI Profile

GPIB

General Purpose Instruments Bus (HP-IB, IEEE-488)

GPS

Global Positioning System

GSC

Global Standards Collaboration

GSM

Global Standard for Mobile

GSM

Groupe Speciale Mobile

GTO

Gate Turn-Off (thyristor)

GUI

Graphical User Interface

H

HBT

Heterojunction Bipolar Transistor

HD

Hard Disk

HD

High Density

HDB

High Density Bipolar (code)

HDB3

High Density Bipolar 3-level (code)

HDD

Hard Disk Drive

HDF

Hierarchical Data Format

HDI

High Density Interface (connector)

HDL

Hardware Description Language

HDLC

High level Data Link Control (IBM, Layer 2) (ISO 4335)

HDSL

High rate Digital Subscriber Loop (Line?)

HDTV

High Definition TeleVision

HDX

Half DupleX

HF

High Frequency

HERF

High Energy Radio Frequency

HFC

Hybrid Fiber/Coaxial network

HI

Host Interface

Hiperlan

HIgh PErformance Radio LAN

HiPPI

HIgh Performance Parallel Interface

HLL

High Level Logic

HLN

High Level Network

HLS

Hue Lightness Saturation (color)

HMA

High Memory Area

HMD

Head Mounted Display

HMI

Human-Machine Interface

HP

Horse Power (746 W)

HP-IB

Hewlett Packard Instrument Bus (GPIB)

HP-PCL

Hewlett Packard Plotter Control Language

HPCC

High Performance Computing and Communications

HPGL

Hewlett Packard Graphic Language

HSB

Hue Saturation Brightness (color)

HSL

Hue Saturation Lightness (color)

HSSI

High Speed Serial Interface

HSTP

High Speed Transport Protocol

HSV

Hue Saturation Value (color)

HT

Horizontal Tab (TAB, char 09 - 09H)

HTL

High Threshold Logic

HTML

HyperText Mark-up Language (WWW)

HUD

Head Up Display

HV

High Voltage

HVAC

Heating, Ventilation and Air Conditioning

HVC

Hue Value Chroma (color)

HVDC

High Voltage Direct Current

I

I&A

Identification & Authentication

IBDN

Integrated Building Distribution Network

IBOC

In Band On Channel

IBS

Intelsat Business Services

IC

Integrated Circuit

IC

Inter-exchange Carrier

I-CASE

Integrated Computer -Aided Software Engineering

ICEA

Insulated Cable Engineers Association

ICMP

Internet Control Message Protocol

ICO

Intermediate Circular Orbit

ICW

Interrupted Continuous Wave

ID

IDentity, IDentifier

IDE

Integrated Drive Electronics (interface)

IDF

Intermediate Distribution Frame (tel)

IDF

Interface Definition Language

IDLC

Integrated Digital Loop Carrier

IDP

Internet Data Packet

IDRP

InterDomain Routing Protocol (ISO)

IEC

Inter Exchange Carrier

IEC

International Electrotechnical Comission (Genˆve)

IEE

Institute of Electrical Engineers (London)

IEEE

Institute of Electric and Electronics Engineers (NY)

IETF

Internet Engineering Task Force

IF

Intermediate Frequency

IFL

Inter-Facility Link

IGBT

Insulated Gate Bipolar Transistor

IGES

Initial Graphics Exchange Standard

IGFET

Insulated Gate Field Effect Transistor

IGP

Interior Gateway Protocol

ILD

Injection Laser Diode

ILS

Instrument Landing System

IMA

Interactive Multimedia Association

IMAP

Internet Message Access Protocol

IMD

InterModulation Distortion

IMPATT

IMPact Avalanche Transit Time

IMTS

Improved Mobile Telephone System

IN

Intelligent Network

INA

Integrated Network Architecture

INMARSAT INternational MARitime SATellite

INTELSAT

INternational TELecommunications SATellite organization

I/O

Input/Output

IP

Internetwork Protocol (layer 3)

IPng

Internet Protocol Next Generation (IETF)

IPv6

Internet Protocol Version 6

IPX

Internet Packet Exchange (Netware, layer 3)

IR

InfraRed

IRED

InfraRed Emitting Diode

IRL

Inter Repeater Link (Ethernet)

IRQ

Interrupt ReQuest line (vector)

IS

Interim Standard (EIA)

ISA

Industry Standard Architecture (PC bus)

ISA

Instrumentation Society of America

ISBN

International Standard Book Number

ISCC

Inter-Society Color Council

ISDN

Integrated Services Data Network

IS-IS

Intermediate System-Intermediate System routing exchange protocol (layer 3, ISO)

ISM

Instrumentation, Scientific and Medical (Band)

ISO

International Standards Organization (Genˆve)

ISP

Internet Service Provider

ISR

International Simple Resale

ITR

Integrated Thyristor / Rectifier

ITS90

International Temperature Scale 1990

ITSC

International Telecommunications Standards Conference

ITU

International Telecommunications Union (Genˆve)

ITU-R

ITU Telecommunications Union - Radio Communications Sector

ITU-T

ITU Telecommunications Union - Telecommunications Sector

ITU-TS

ITU Telecommunications Standardization

IVA

Integrated Voice Application

IVDLAN

Integrated Voice/Data Local Area Network (IEEE 802.9)

IVHS

Intelligent Vehicle Highway System

J

JCL

Job Control Language

JDC

Japan's Digital Communications

JEDEC

Joint Electron Devices Engineering Council

JEIDA

Japan Electronic Industry Development Association

JIS

Japan Industry Standard

JIT

Just In Time

JPEG

Joint Photographic Experts Group

JTC

Joint Technical Committee

K

KB

Knowledge Base (AI)

KB

KiloBytes

kbps

Kilo Bits Per Second

KWIC

KeyWord In Context

L

LAN

Local Area Network

LAP

Link Access Procedure

LAP-B

Link Access Procedure, Balanced (Multilink operation procedure, X25)

LAP-D

Link Access Procedure, D Channel

LAP-M

Link Access Procedure for Modems

LASER

Light Amplification by Stimulated Emission of Radiation

LAT

Local Area Transport (DEC,Ethernet)

LATA

Local Area Terminal Access (USA)

LCD

Liquid Crystal Display

LD

Laser Disc

LDF

Low Density Foam (cables)

LEC

Local Exchange Carrier

LED

Light Emitting Diode

LEO

Low Earth Orbit

LERP

Low End Reference Platform

LF

Line Feed (char 10 -0AH)

LIBOR

London Inter Bank flOating Rate

LIDAR

LIght Detection And Ranging

LIF

Low Insertion Force

LIFO

Last in, First Out

LIM EMS

Lotus-Intel-Microsoft Expanded Memory Specification

LIP

Large Internet Packet

LLC

Logical Link Control

LMI

Link Management Interface (Frame Relay)

LNA

Low Noise Amplifier

LNC

Low Noise Converter

LNM

LAN Network Management (IBM)

LP

Linear Programming

LPC

Linear Predictive Coding

lpi

Lines Per Inch

LQ

Letter Quality

LSAP

Link layer Service Access Point

LSB

Least Significant Bit

LSI

Large Scale Integration

LUN

Logical Unit Number

LUT

Look Up Table

LZ-78

Lempel & Ziv 1978 (compression)

LZW

Lempel, Ziv & Welch

M

MAC

Media Access Control (sub-layer 2)

MAC

Multiplexed Analog Components (TV)

MAN

Metropolitan Area Networks

MAP

Manufacturing Automation Protocol

MAPs

Multiple Access ProtocolS

MAS

Multiple Address System

MASER

Microwave Amplification by Stimulated Emission of Radiation

MAU

Medium Attachment Unit (Ethernet)

MBE

Molecular Beam Epitaxy

MBone

Multicast backBONE (Internet)

MC

Micro Channel (IBM)

MCA

Micro Channel Architecture (IBM)

MCGA

MultiColor Graphics Array

MCM

Multi Chip Module

MCPC

Multiple Channel Per Carrier

MD

Mini Disk

MDA

Monochrome Display Adapter

MDF

Main Distribution Frame (tel)

MDI

Medium Dependent Interface

MEMS

Micro Electro Mechanical Systems

MEO

Medium Earth Orbit

MESFET

MEtal Semiconductor Field Effect Transistor

MFLOPS

Million of FLoating point OPerationS

MFM

Modified Frequency Modulation

MHS

Message Handling Services

MIB

Management Information Base

MIC

Media Interface Connector

MIC

Monolithic Integrated Circuit

MICR

Magnetic Ink Character Recognition

MIDI

Musical Instruments Digital Interface

MIF

Management Information File

MIL

MILitary standard (USA)

MILSPEC

MILitary SPECification (USA)

MIME

Multipurpose Internet Mail Extensions

MIPS

Millions of Instructions Per Second

MIS

Management Information System

MIT

Massachusetts Institute of Technology (USA)

MITI

Ministry of International Trade and Industry (Japan)

MJTC

MultiJunction Thermal Converter

MKSA

Meter Kilogram Second Ampere (SI)

MMI

Man Machine Interface

MMIC

Monolithic Microwave Integrated Circuit

MMW

MilliMeter Waves

MNOS

Metal Nitride Oxide Semiconductor

MNP

Microcom Networking Protocol

MO

Magneto Optical (disk)

MO/CD-R

Magneto Optics Compact Disc Rewriteable

Modem

MOdulator-DEModulator

MOS

Metal-Oxide Silicon/Semiconductor

MOSFET

Metal-Oxide Silicon Field Effect Transistor

MOV

Metal-Oxide Varistor

MPC

Multimedia Personal Computer

MPEG

Motion Picture Experts Group

MPGA

Mask Programmable Gate Array

MPP

Massively Parallel Processing

MPS

Message Passing System

MPU

Micro Processor Unit

MS

Master Station

MSB

Most Significant Bit

MS-DOS

MicroSoft Disk Operating System

MSI

Medium Scale Integration

MSK

Minimum Shift Keying

MSS

Mobile Satellite Service

MTA

Message Transfer Agent

MTBF

Mean Time Between Failures

MTS

Mobile Telephone System

MTTR

Mean Time To Repair

MUX

MUltipleXor

MV

Medium Voltage

MVS

Multiple Virtual Storage (IBM)

MW

Mega Watt

MW

Micro Wave

MXI

Multisystem eXtension Interface (bus)

N

N/A

Not Applicable

NA

Numeric Aperture

NAU

Network Access Point

NAU

Network Addressable Unit

NBS

National Bureau of Standards œ(NIST)

NC

Network Congestion (No Connection)

NC

Numeric Control

NCC

Network Control Center

NCGA

National Computer Graphics Association

NCP

Network Control Protocol (IBM)

NCS

National Communications System (USA)

NEC

National Electric Code (USA)

NEMA

National Electric Manufacturers Association (USA)

NEP

Noise Equivalent Power

NESC

National Electric Safety Code (USA)

NET

Normes Europ‰ennes de T‰l‰communications

NEXT

Near-End Cross Talk

NF

Noise Figure

NFS

Network File Services

NIC

Network Information Center (Internet)

NIC

Network Interface Card

NiCad

NIckel CADmium (battery)

NII

National Information Infrastructure

NiMH

NIckel Metal Hydride (battery)

NIST

National Institute of Standards & Technology

NIU

Network Interface Unit

NLM

Network Loadable Module (Netware)

NMF

Network Management Forum

NMOS

Negative Metal Oxide Silicon

NMR(I)

Nuclear Magnetic Resonance (Imaging)

NMRR

Normal Mode Rejection Rate

NMS

Network Management System

NMT

Nordic Mobile Telephone

NNI

Network Node Interface

NOC

Network Operating Center

NPN

Negative-Positive-Negative

NPR

Non Polarized Radial

NRAM

Non Volatile RAM

NRZ

Non Return to Zero

NRZI

Non Return to Zero Inverted

NSAP

Network Service Access Point

NSF

National Science Foundation

NSFNet

National Science Foundation NET

NTC

Negative Temperature Coefficient

NTSC

North american Television Standards Committee

NVP

Nominal Velocity of Propagation

NVRAM

Non-Volatile RAM

O

OA&M

Operations, Administration & Maintenance

OBP

Open Bridging Protocol

OC-1

Optical Carrier level 1 (51.84 Mbps)

OCR

Optical Character Recognition

OCWR

Optical Continuos Wave Reflectometer

OD

Outside Diameter

ODA

Office Document Architecture (ISO 8613)

ODBC

Open Data Base Connectivity

ODI

Open Data-Link Interface (Netware)

ODIF

Office Document Interchange Format (ISO 8613)

OEIC

OptoElectronic Integrated Circuit

OEM

Original End-product Manufacturer

OIG

OSPF Interoperability Group

OLTP

On Line Transaction Processing

OLE

Object Linking and Embedding

OMG

Object Management Group

OMT

Ortho Mode Transducer (satellite)

ONU

Optical Network Unit

OODB

Object Oriented Data Base

OOP

Object Oriented Programming

OpAmp

OPerational AMPlifier

OPGW

overhead OPtical Ground Wave

OPI

Open Prepress Interface

OQPSK

Offset Quad Phone Shift Keying

ORB

Object Request Brokers

ORL

Optical Return Loss

OS

Operating System

OSF

Open Software Foundation

OSI

Open Systems Interconnection (ISO 7498)

OSPF

Open Shortest Path First

OSS

One-Stop Shopping

OTDR

Optical Time Domain Reflectometer

P

PABX

Private Automatic Branch eXchange

PACS

Personal Access Communications Services/System

PAD

Packet Assembler Disassembler (X.3,X.25)

PAL

Phase Alternating Line (TV)

PAL

Programmable Array Logic

PAM

Pulse Amplitude Modulation

PAMR

Public Access Mobile Radio (SMR)

PAP

Password Authentication Protocol

PAX

Private Automatic eXchange

PBA

Printed Board Assembly

PBX

Private Branch eXchange

PC

Personal Computer

PC

Program Counter

PCB

Printed Circuit Board

PCCA

Portable Computer and Communications Association

PCI

Protocol Control Information

PCI

Peripheral Components Interconnect (bus)

PCM

Pulse Code Modulation

PCMCIA

Personal Computer Memory Card International Association

PCN

Personal Communications Network (Europe)

PCS

Personal Communications Services (USA)

PCSN

Private Circuit Switching Network

PDA

Personal Digital Assistant

PDC

Personal Digital Cellular (Japan)

PDF

Portable Document Format

PDFA

Praseodymium Doped Fiber Amplifier

PDH

Plesiochronic Digital Hierarchy

PDMA

Polarization Division Multiple Access

PDN

Public Data Network

PDS

Processor Direct Slot

PE

PolyEthylene

PECC

Partially Error Controlled Connections

PERL

Practical Extraction and Report Language

PERM

Pre-Embossed Rigid Magnetic

PERT

Program Evaluation and Review Technique

PET

Positron Emission Tomography

PHIGS

Programmer's Hierarchical Interactive Graphics System

PHS

Personal Handy phone System (Japan)

PIA

Programmable Interface Adapter

PICS

Platform for Internet Content Selection

PID

Proportional Integral Differential

PIKS

Programmer's Imaging Kernel System

PIN

Personal Identification Number

PIN

Positive Intrinsic Negative (Diode)

PING

Packet INternet Grouper (RFC-792)

PIV

Peak Inverse Voltage

PKC

Public Key Criptosystem

PL/1

Programming Language (version) 1

PLA

Programmable Logic Array

PLC

Power Line Carrier

PLC

Programmable Logic Controller

PLCC

Plastic Leadless Chip Carrier

PLD

Programmable Logic Device

PMPO

Peak Music Power Output

PMOS

Positive Metal Oxide Silicon

PMR

Public/Private (?) Mobile Radio

PMU

Phasor Measurement Unit

PNNI

Private Network to Network Interface

PNP

Positive-Negative-Positive

PON

Passive Optical Network

POP

Point Of Presence

POP

Post Office Protocol (RFC 1125)

POS

Point of Sale

POSIX

Portable Operating System Interface (IEEE)

POTS

Plain Old Telephone Service

PPD

Postscript Printer Description

ppm

Parts Per Million

PPP

Point to Point Protocol

PPS

Packets Per Second

PQFP

Plastic Quad Flat Pack

PRA

Primary Rate Access (2Mb/s - ISDN)

PRI

Primary Rate Interface (ISDN)

PROM

Programmable Read-Only Memory

PS

Post Script

PSDN

Packet Switched Data Network

PSI

Packet Switched Interface (DEC)

PSI

Peripheral System Interconnect

psi

Pounds per Square Inch

PSK

Phase Shift Keying

psRAM

Pseudo Static Random Access Memory

PSTN

Public Switched Telephone Network

PSW

Processor Status Word

PTB

Phisikalisch-Technische Bundesanstalt (Braunschweig)

PTC

Positive Temperature Coefficient

PTM

Packet Transfer Mode

PTM

Pulse Time Modulation

PTP

Peak To Peak (voltage)

PTT

Post, Telegraph and Telephone

PU

Per Unit

PV

Photo Voltaic

PVC

Permanent Virtual Circuit/Connection

PVC

Poly Vinyl Chloride

PVQ

Pyramid Vector Quantization (codification)

PWM

Pulsed Wave Modulation

PWM

Pulse-Width Modulation

Q

QA

Quality Assurance

QAM

Quadrature Amplitude Modulation

QBE

Query By Example

QC

Quality Control

QFP

Quad Flat Pack

QHE

Quantum Hall Effect

QoS

Quality Of Service

QPSK

Quadrature/Quaternary Phase Shift Keying

QWIP

Quantum-Well Infrared Photo detector

R

R&D

Research and Development

RACE

Research & development for Advanced Communications in Europe

RAD

Rapid Application Development

RADAR

RAdio Detection And Ranging

RAID

Redundant Array of Inexpensive Disks

RAM

Random Access Memory

RARP

Reverse Address Resolution Protocol

RBOC

Regional Bell Operating Company (USA)

RCA

Radio Corporation of America

RCL

Resistance, Capacitance and inductance(L)

RDAC

Remote Data Acquisition and Control

RDBMS

Relational Data Base Management System

RELP

Residually Excited Linear Predictive

RETMA

Radio Electronics Television Manufacturers Association

RF

Radio Frequency

RFC

Request For Comment (Internet)

RFI

Radio Frequency Interference

RG

Radio Guide (Hw catalog)

RGB

Red Green Blue

RIP

Raster Image Processor

RIP

Router Information Protocol

RISC

Reduced Instruction Set Computer

RJE

Remote Job Entry (IBM)

RLAP

Radio data Link Adapter Protocol

RLL

Radio Local Loop

RLL

Relay Ladder Logic

RLL

Run-Length Limited (code)

RMA

Return Merchandise Authorization

RMON

Remote MONitoring

RMS

Root Mean Square

ROI

Return On Investment

ROM

Read-Only Memory

RPC

Remote Procedure Call

RPG

Report Program Generator

rpm

Revolutions Per Minute

RS

Recommended Standard (EIA)

RS

Remote Station

RS

Reed Salomon (code)

RSA

Rivest Shamir & Adleman (encryption)

RSIs

Repetitive Stress InjurieS

RSVP

resource ReSerVation Protocol

RSVP

R‰pondez S'il Vous Plait

RT

Room Temperature

RTC

Real Time Clock

RTD

Resistive Temperature Detector

RTF

Rich Text Format

RTOS

Real Time Operating System

RTS

Request To Send

RTT

Round Trip Time

RTU

Remote Telemetry Unit

R/W

Right of Way

RWM

Read-Write Memory

RX

Reception

RXD

Received Data

S

S&H

Shipping & Handling

SA

Service Availability (tel)

SAL

SQL-windows Application Language

SAM

Sequential Access Memory

SAP

Service Access Point

SAP

Services Advertising Protocol (Netware)

SAR

Synthetic Aperture Radar

SAT

Site Acceptance tests

SARM

Set Asynchronous Response Mode (HDLC)

SAW

Surface Acoustic Wave

SBC

Single Board Computer

SBO

Select-Before-Operation (SCADA)

SCADA

Supervisory Control And Data Acquisition

SCI

Scalable Coherent Interface (IEEE 1596 - 1 Gbit/s)

SCPC

Single Channel Per Carrier (Satellite)

SCPI

Standard Commands for Programmable Instruments

SCR

Silicon Controlled Rectifier

SCS

Silicon Controlled Switch

SCSI

Small Computer System Interface

ScTP

SCreened Twisted Pair (FTP)

SDF

System Data Format

SDH

Synchronous Digital Hierarchy

SDLC

Synchronous Data Link Control

SDMA

Space Division Multiple Access

SDSL

Symmetric Digital Subscriber Line

SDU

Service Data Unit

SEAL

Simple and Efficient Adaptation Layer (AAL5 - ATM)

SECAM

SEquentiel Couleur Avec Memoire (TV)

SER

Sequence of Events Recording

SFTP

Shielded Foil Twisted Pair

SGML

Standard Generalized Mark-up Language

SHN

Self-Healing Networks

SI

Systˆme International

SIA

Satellite Industry Association

SIC

Silicon Carbide

SIDF

System Independent Data Format

SIMM

Single In-line Memory Module

SINAD

SIgnal, Noise And Distortion

SIP

Single In-line Package

SIS

Superconductor-Insulator-Superconductor

SIS

Standardiseiringskommissionen I Sverige (Stockholm)

SJTC

Single-Junction Thermal Converter

SLED

Single Large Expensive Disk (RAID)

SLIP

Serial Line Internet Protocol

SM

Single Mode (fiber)

SM

Surface-Mount

SMA

SubMiniature A connector (RF-FO)

SMD

Surface-Mounted Device

SMDL

Standard Music Description Language

SMDS

Switched Multimegabit Data Service

SMF

Single Mode Fiber

SMPTE

Society of Motion Pictures and Television Engineers

SMR

Specialized Mobile Radio

SMT

Surface Mount Technology

SMTP

Simple Message Transfer Protocol (Internet - RFC 822)

SNA

System Network Architecture (IBM)

SNAP

Sub-Network Access Protocol

SNI

Standard Network Interface

SNMP

Simple Network Management Protocol

SNR

Signal to Noise Ratio (S/N)

SNRM

Set Normal Response Mode (HDLC)

SOE

Sequence Of Events (recording)

SOH

Start Of Header (char 01 - 01H)

SOHO

Small Office - Home Office

SOIC

Small-Outline Integrated Circuit (SMD)

SOJ

Small-Outline J-lead (SMD)

SOL

Small-Outline Leaded (SMD)

SONET

Synchronous Optical NETwork

SOS

Silicon-On-Sapphire

SPC

Stored Program Control

Spec

SPECification

SPEC

Standard Performance Evaluation Corporation

SPST

Single Pole Single Throw (switch)

SPX

Sequenced Packet Exchange (layer 4, Netware)

SQE

Signal Quality Error (Heartbeat) (Ethernet)

SQID

Super conductive Quantum Interference Device

SQL

Structured Query Language

SRAM

Static Random Access Memory

SRP

Suggested Retailer's Price

SRT

Source Route Transport (Token Ring)

SRP

Source Routing Protocol

SS

Spread Spectrum

SS7/CCS

Signalling System 7 / Common Channel Signalling (tel)

SSB

Single Side Band

SSR

Solid State Relay

SST

Spread Spectrum Technology

Std

STanDard

STB

Set Top Box (TV)

STN

Super Twisted Nematic (LCD)

STP

Shielded Twisted Pair

STP

Spanning Tree Protocol (IEEE)

STX

Start of TeXt (char 02 - 02H)

SVCs

Switched Virtual Circuit

SVD

Simultaneous Voice and Data

SVID

System V Interface Definition (Unix)

SVP

Surge Voltage Protector

SWC

Surge Withstand Capability

SWEDAC

SWEDish board for technical ACcreditation

SWIFT

Society for World-wide Inter-bank Financial Telecommunications

SWR

Standing Wave Ratio

T

T1

Trunk 1 (1544 bps, 24-channel PCM)

T3

Trunk 3 (44.736 Mb/s)

TAB

Tape Automated Bonding

TACS

Total Access Communications System

TAPI

Telephone Application Program Interface

TCC

Telephone Country Code

TCM

Trellis Coded Modulation

TCP

Tape Carrier Package

TCP

Transmission Control Protocol (layer 4)

TCP/IP

Transmission Control Protocol/Internet Protocol

TDM

Time Division Multiplex

TDMA

Time Division Multiple Access

TDR

Time Domain Reflectometry

TE

Transverse Electric

TEM

Transverse Electro Magnetic

TFE

TetraFluoro Etilene (Teflon)

TFT

Thin Film Transistor

TFTP

Trivial File Transfer Protocol

THD

Total Harmonic Distortion

THF

Tremendously High Frequency

TIA

Telecommunications Industries Association

TIFF

Tag Image File Format

TM

Transverse Magnetic

T&M

Test and Measurement

TMN

Total/Telecommunications Management Network (ITU-TS M.3010)

TNC

Threaded Normalized Connector

TO

Transistor Outlook

TOP

Technical and Office Protocol (LAN)

TPC

Transaction Performance Council

TPF

Transaction Processing Facility (IBM)

tpi

Tracks Per Inch

TQC

Total Quality Control

TQM

Total Quality Management

TSOP

Thin Small Outline Package (SMD)

TSR

Terminate and Stay Resident (DOS)

TTL

Transistor-Transistor Logic

TTX

TeleTeXt

TTY

TeleTYpe

T›V

Technische ›berwachungs Verein (Germany)

TVC

Thermal Voltage Converter

TWT

Traveling Wave Tube

TX

Telex

TX

Transmission

TXD

Transmitted Data

TXT

TeXT

U

UART

Universal Asynchronous Receiver - Transmitter

UDP

User Datagram Protocol (layer 4)

UHF

Ultra High Frequency (300-3000 MHz)

UIT

Union Internationale des T‰l‰communications (ITU - Genˆve)

UJT

UniJunction Transistor

UL

Underwriters Laboratories (USA)

ULS

User Location Service

UMTS

Universal Mobile Telecommunications System

UNI

User to Network Interface

UPC

Universal Product Code (bar code)

UPS

Uninterruptible Power Supply

UPS

United Parcel Service (USA)

UPT

Universal Personal Telecommunications

URL

Universal Resource Locator (Internet)

USAT

Ultra-Small Aperture Terminal

USB

Universal Serial Bus (Intel)

USD

United States' Dollar

USDC

United States' Digital Communications

UT

Universal Time

UTC

Universal Time Coordinated

UTE

Union Technique de l'Electricit‰ (Paris)

UTP

Unshielded Twisted Pair (Ethernet)

UUCP

Unix to Unix Copy Protocol

UV

UltraViolet

V

VAN

Value-Added Network

VAR

Value Added Reseller

VAR

Volt-Ampere Reactive

VAX

Virtual Memory eXtension (DEC)

VBR

Variable Bit Rate

VC

Virtual Circuit

VCA

Voltage Controlled Amplifier

VCI

Virtual Channel Identifier (ATM)

VCO

Voltage Controlled Oscillator

VCR

Video Cassette Recorder

VDE

Verband Deutscher Elektrotechniker (Germany)

VDR

Voltage Dependent Resistor

VDSL

Very-high-rate Digital Subscriber Line

VDT

Video Display Terminal

VDU

Video Display Unit

VESA

Video Electronics Standards Association

VF

Voice Frequency

VGA

Video Graphics Adapter

VHDL

VHSIC Hardware Description Language

VHF

Very High Frequency (30-300 MHz)

VHS

Video Home System

VHS-C

Video Home System Compact

VHSIC

Very High Scale Integrated Circuit

VI

Virtual Instrument

VIA

Versatile Interface Adapter

VINES

VIrtual NEtwork Software (Banyan)

VLB

VESA Local Bus (VL bus)

VL bus

VESA Local BUS (VLB)

VLIW

Very Long Instruction Word

VLSI

Very Large Scale Integration

VLM

Virtual Loadable Module (Netware)

VMEbus

Versa Module Eurocard BUS (IEEE 1014)

VMS

Virtual Memory System (DEC)

VMS

Voice Message System

VOD

Video On Demand

VOR

Vhf Omnidirectional Range

VOX

Voice Operated relay

VP

Virtual Path

VPI

Virtual Path Identifier (ATM)

VPN

Virtual Private Network

VR

Virtual Reality

VR

Voltage Regulator

VRAM

Video Random Access Memory

VRC

Vertical Redundancy Check (parity)

VRMS

Volts Root Mean Square

VSAT

Very Small Aperture Terminal

VSB

Vestigial Side Band

VSELP

Vector Sample/Sum Excited Linear Prediction (code-Motorola)

VT

Video Terminal (DEC)

VT

Virtual Terminal

VTR

Video Tape Recorder

VU

Volume Unit (tel)

VXI

Vmebus eXtensions for Instrumentation

W

W3

World Wide Web (WWW)

W3C

World Wide Web Consortium

WACS

Wireless Access Communications System

WAN

Wide Area Networks

WAN

Wide Area Information Service

WARC

World Administrative Radio Conference

WLL

Wireless in the Local Loop

WDM

Wave Division Multiplexing

WEC

World Energy Council

WMF

Windows Meta File

wpm

Words Per Minute

WORM

Write Once, Read Many

WRU

Who aRe yoU

WWAN

Wireless Wide Area Networks

WWN

World Wide Net

WWW

World Wide Web

WYSIWYG What You See Is What You Get

X

XLPE

cross Linked PolyEthylene

XMS

eXtended Memory Specification (>1024kB)

XNS

Xerox Network Specification

XOR

eXclusive OR

XTP

eXpress Transfer Protocol

XYZ

color description (CIE)

Y

YIQ

Y(luminance) Intensity Q(crominance) (color NTSC)

YAG

Yttrium Aluminum Garnet

Z

ZD

Zero Defects

ZIF

Zero Insertion Force