# 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 Full List



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

DAICI (Diccionario de Acronimos en Ingenieria, Comunicaciones e Informatica) by Juan Carlos Miguez
Last modified: 1997-01-30