A/D Analog/Digital
A/UX Apple/UniX
AAAI American Association for Artificial Intelligence
AACS Additude and ArtiCulation System
AAL Atm Adaptation Layer
AARP Appletalk Address Resolution Protocol
AAT Average Access Time
ABB Asea Bron Boveri
ABC 1) Atanasoft-Berry Computer
2) Auto-Bahn Consortium
3) Advanced Business Communiacation
4) Automatic Brightness Control
ABEND ABnormnal END
ABI Application Binary Interface
ABIOS Advanced Basic Input Output System
ABR Available Bit Rate
ABS ABSolute value
AC 1) Alternating Current
2) Authentication Center
ACARD Advisory Council for Applied Research and Development
ACC 1) ACCumulator
2) Automatic Chrominance Control
3) Automatic Color Control
4) Automatic Contrast Control
ACD Automatic Calling Distribution
ACDI Asynchronous Communication Device Interface
ACE 1) Advanced Computer Environment
2) Automatic Calling Equipment
ACIA Asynchronous Communication Interface Adapter
ACIRC Adaptive Cross Interleave Reed-Solomon
ACP Algebra of Communicating Processes
ACPI Advanced Configuration and Power Interface
ACSE Association Control Service Element
ACU Auto Calling Unit
ADP Automatic Data Processing
ADSL Asymmetric Digital Subscriber Line
AFP Appletalk Filing Protocol
AGP 1) Accelerated Graphics Port
2) Advanced Graphics Port
AI 1) Application Interface
2) Artificial Intelligence
AIX Advanced Interactive Executive
ALi Acer Laboratories Inc.
ALIAS ALgorIthmic ASsembly language
ALIBI Adaptive Location of Internetworked Bases of Information
AMD Advanced Micro Devices
AMI 1) Alternate Mark Inversion
2) American Megatrend Inc.
AMI-BIOS American Megatrend Inc. BIOS
ANSI American National Standards Institute
AnyLAN Any Local Area Networks
AOL American OnLine
API 1) Application Programming Interface
2) Application Program Interface
APM Advanced Power Management
A/R Accounts Receivable
ARA Appletalk Remote Access
ARAG AntiReflective-AntiGlare
ARAS AntiReflective-AntiStatic
ARCA Advanced Risc Computing Architecture
ARCnet Attached Resource Computer NETwork
ARL Adjusted Ring Length
ARLL Advanced Run Length Limited
ARM 1) Advanced Risc Machine
2) Annotated Reference Manual
3) Asynchronous Response Mode
ARMA Association of Records Managers and Administrators
ARP Address Resolution Protocol
ARPANET Advanced Research Projects Agency NETwork
ARPL Adjust Requested Privilege Level
ARTA Apple Real Time Architecture
ARTIC A Real-Time Interface Coprocessor
ARTS Asynchronous Remote Takeover Server
ARTT Asynchronous Remote Takeover Terminal
ARQ Automatic Repeat reQuest
ARU Audio Response Unit
AS Autonomous System
ASAI Adjunct Switch Application Interface
ASAP 1) As Soon As Possible
2) Automatic Switching And Processing
ASB Advanced System Buffering
ASC ASCii
ASCII 1) American Standard for Code International Interchange
2) American Standard Code for Information Interchange
ASD Automatic Skip Driver
ASF 1) Active Streaming Format
2) Advanced Streaming Format
ASIC Application-Specific Integrated Circuit
ASIO Audio Stream In/Out
ASIT Advanced Security and Identification Technology
ASL Adaptive Speed Levelling
ASLM Apple Shared Library Manager
ASMP ASymmetric MultiProcessing
ASN 1) Abstract Syntax Notation
2) Autonomous System Number
ASO Automated Systems Operations
ASP 1) Advanced Signal Prosessing
2) Active Server Page
3) Application Service Provider
4) Authorized Service Provider
5) Association of Shareware Professionals
ASPI Advanced Scsi Programming Interface
ASPS Advanced Signal Processing System
ASR 1) Address Space Register
2) Automatic Speech Recognition
3) Automatic Send-Receive
AST Albert wong, Safi qureshey, Thomas yuen
AS/U Advanced Server for Unix
ASYNC ASYNChronous
AS/400 Application System/400
AT 1) Advanced Technology
2) ATtention command language
ATA AT Attachment
ATAPI 1) AT Attachment Programming Interface
2) AT Attachment Packet Interface
ATDP Attention Dial Pulse
ATDT Attention Dial Tone
ATE Automated Test Equipment
ATG Advanced Technology Group
ATH Attention Hang-up
ATK Automaattinen TietojenKäsittely
ATL Active Template Library
ATM 1) Asynchronous Transfer Mode
2) Automated Teller Machine
3) Air Traffic Management
4) Adobe Typeface Manager
ATPS AppleTalk Printing Services
ATR Automatic Terminal Recognition
ATS 1) Administrative Terminal System
2) Apple Terminal Services
AT&T American Telephone & Telegraph
ATTN ATTeNtion
ATTRIB ATTRIBute
ATX Advanced Technology eXtended
AUDIT AUtomated Data Input Terminal
AUI 1) Attachment Unit Interface
2) Autonomous Unit Interface
AUP Acceptable Use Policy
AUTO AUTOmatic
AUTOEXEC AUTOmatic EXECution
AUX AUXiliary
AV 1) Audio/Video
2) AudioVisual
3) Authenticity Verification
AVA Audio Visual Authoring
AVC Audio Visual Connection
AVD Alternating Voice and Data
AVG AVeraGe
AVI Audio Visual Interleave
AVP Attribute-Value Pair
AVR Automatic Voice Recognition
AVT Applied Voice Technology
AWE Advanced Wave Effects
AWG American Wire Gage
AWK al Aho, peter Weinberger, brian Kernighan
AWS Advanced Workstations and Systems
AWT Abstract Window Toolkit

B 1) Bit
2) Byte
B-ICI B-isdn Inter Carrier Interface
B-ISDN Broadband Integrated Services Digital Network
B-NT1 Broadband Network Terminal 1
B-NT2 Broadband Network Terminal 2
B-TA Broadband Terminal Adapter
B-TE1 Broadband Terminal Equipment 1
B-TE2 Broadband Terminal Equipment 2
BABCo Business Application Performance COrporation
BACP Bandwidth Allocation Control Protocol
BAN Bridged Area Network
BARK Binär Aritmetisk Rela-Kalkylator
Base2 Baseband, 200 m
BaseF Baseband, Fiber
BaseFX Baseband, Fiber
BaseT Baseband, Twisted-pair
BaseTX Baseband, Twisted-pair
BaseVG Baseband, Voice Grade
BaseX Baseband, eXtended
BAS Basic Activity Subset
BASF Badische Anilin und SodaFabrik
BASIC Beginners All-purpose Symbolic Information Code
BASICA Beginner's All-purpose Symbolic Instruction Code Advanced
BASIS BAse Stored ImageSensor
BAT BATch
BBD Bucket-Brigade Device
BBN Bolt, Beranek et Newman inc.
BBS Bulletin Board System
BCC 1) Binary Cyclic Code
2) Block Check Character
BCD 1) Binary Coded Decimal
2) Binary Coded Digit
BCH Bose-Chadhuri-Hocquenghem code
BCLDS Broadband ConnectionLess Data Service
BCS 1) Basic Combined Subset
2) British Computer Society
BCT Binary Code Ternary
BDSS Bayesian Decision Support System
BDU Bridge Data Unit
BEDO DRAM Burst Extended Data Output Dynamic Random Access Memory
BEL BELl
BER Bit Error Rate
BERT Bit Error Rate Test
BESK Binär Elektronisk Sekvens-Kalkylator
BFO Beat Frequency Oscillator
BFOC Bayonet Fibre Optic Connector
BFTP Binary File Tranfer Protocol
BG BackGround
BGA 1) Ball Grid Array
2) Bridge Group Address
BGP Basic Gateway Protocol
BHCA Busy Hour Call Attempts
BI BIdirectional
BIF Binary Image Format
BIOS Basic Input Output System
BIN BINary
BIND Berkeley Internet Name Daemon
BIPS Billion of Instruction Per Second
BISYNC Binary Synchronous Communication Protocol
BIT BInary digiT
BITNET Becouse It's Time NETwork
BIU Basic Information Unit
BLOB Binary Large OBject
BLU Basic Link Unit
BMDP BioMedical Computer Program
BMP BitMap Picture
BNC Bayonet Nut Coupling
BOD 1) Bandwidth On Demand
2) Book On-Demand
BOF Beginning Of File
BONDING Bandwith ON Demand INteroperability Group
BOOTP BOOTstrap Protocol
BOP Bit Oriented Protocol
BOT Beginning Of Tape
BPDU Bridge Protocol Data Unit
BPI 1) Bits Per Inch
2) Bytes Per Inch
BPP Bits Per Pixel
BPS 1) Bit Per Second
2) Bytes Per Second
BPSK Binary Phase Shift Keying
BRA British Robot Associati-on
BRAM Burst Random Access Memory
BREMA British Radio Equipment Manufacturers Association
BRI Basic Rate Interface
BROUTER Bridge + ROUTER
BS BackSpace
BSA 1) Boron-Silicon-Glass Self-Aligment
2) Business Software Alliance
BSC 1) Base Station Controller
2) Binary Synchronous Communications protocol
BSD 1) Binary Coded Decimal
2) Berkely Software Distribution
3) Berkely Standard Distribution
BSDI Berkeley Software Design, Inc.
BSRAM Burst Static Random Access Memory
BSS 1) Basic Synchronization Subset
2) Base Station System
BST Boundary-Scan Testing
BTAM Basic Telecommunications Access Method
BTD Bad Track Table
BTRON Business The Realtime Operating System Nucleus
BTS Base Transceiver Station
BTU Basic Transmission Unit
BTX BildschirmTeXt
BUA Bridge Unique Address
BWCC Borland Windows Custom Controls

CA Computer Associates
CAAD Computer Aided Architectural Design
CABD Computer Aided Building Design
CAC Computer Aided Creativity
CACSD Computer Aided Control System Design
CAD 1) Computer Aided Design
2) Computer Aided Drafting
CADD Computer Aided Drauthing and Design
CADS 1) Computer Aided Design System
2) Computer Aided Drafting System
CAE 1) Common Application Environment
2) Computer Aided Engineering
CAI 1) Computer Aided Inspection
2) Computer Aided Instruction
3) Computer Assisted Instruction
CAIA Computer Assisted Information Access
CAIS Common Apse Interface Set
CAISE Computer Aided Integrated Software Engineering
CAIT Central Academy for Information Technology
CAL Computer Aided learning
CALS Computer Aided Acquisition and Logistic Support
CAM 1) Computer Aided Manufacturing
2) Common Access Method
3) Content Addressable Memory
4) Complete Answering Machine
CAMAC Computer Aided Measurement And Control
CAN 1) CANcel
2) Controller Area Network
CAP 1) Carrierless Amplitude and Phase modulation
2) Computer Aided Publishing
CAPI Common isdn API
CAPP 1) Computer Aided Process Planning
2) Computer Aided Printing and Publishing
CAPS CAPitalS
CaPSL Canon Printing System Language
CAR Computer Aided Radio
CARAM Content Addressable Random Access Memory
CAROL Computer Aided Revolution On Learning
CAS Communication Application Specification
CASE 1) Common Application Service Element
2) Computer Aided Software Engineering
CAT 1) Computer Aided Testing
2) Computer Aided Teaching
3) Computer Adaptive Test
4) Computer Aided Tomography
5) Computer Aided Transcription
6) Computer Aided Concatenate
7) CATenate
8) CATalog
9) CATegory
10) Common Abstract Tree language
CATE Computer Aided Testing Engineering
CATIA Computer-graphics Aided Three-dimensional Interactive Application
CAV Constant Angular Velocity
CAU 1) Control Access Unit
2) Controlled Access Unit
CBASIC Commercial BASIC
CBBS Computer Bulletin Board System
CBC Cipher Block Chaining
CBDS Connectionless Broadband Data Service
CBEMA Computer and Business Equipment Manufacturers Association
CBIOS Compatibility Basic Input Output System
CBL Computer-Based Learning
CC 1) Carbon Copy
2) Cluster Controller
CCFL Cold Cathode Fluorescent Lamp
CD 1) Compact Disk
2) Communication Driver
3) Change Directory
4) Carrier Detect
CD-DA Compact Disk Digital Audio
CD-I Compact Disk Interactive
CD-MO Compact Disk Magneto Optical
CD-R Compact Disk Recordable
CD-RAM CacheD Random Access Memory
CD-RDx Compact Disk - Read only memory Data eXchange standard
CD-ROM 1) Compact Disk Read Only Memory
2) Compact Disk Read Only Media
CD-ROM XA Compact Disk Read Only Memory eXtended Architecture
CD-RTOS Compact Disk - Real Time Operating System
CD-RW Compact Disk - ReWritable
CD-V Compact Disk Video
CD-WO Compact Disk Write Once
CDA 1) Compact Disk Audio
2) Compound Document Architecture
CDC Control Data Corporation
CDDB Compact Disc DataBase
CDDI Coaxial Distributed Data Interface
CDF Common Data Format
CDL Computer Description Language
CDMA Code Division Multiple Access
CDRL Contract Data Requirements List
CDS Command and Data System
CDV Cell Delay Variation
CE 1) Cache Enable
2) Chip Enable
3) Collision Elimination
4) Convert Enable
CG Chassis Ground
CGA 1) Color Graphics Adapter
2) Column Grid Array
CGI 1) Common Gateway Interface
2) Computer Graphics Interface
CGM Computer Graphics Metafile
CHS Cylinder-Head-Sector
CISC Complex Instruction Set Computer
CISC/VS Customer Information Control System / Virtual Storage
CLI Call Level Interface
CLP CLiPboard
CMOS Complementary Metal Oxide Semiconductor
CMY Cyan, Magenta, Yellow
CMYK 1) Cyan, Magenta, Yellow, blacK
2) Cyan, Magenta, Yellow, Key
COBOL COmmon Business Oriented Language
COM serial COMmunication port
CON CONsole
CORBA Common Objet Request Broker Architecture
CP/M Control Program for Microcomputers
CPU Central Prosessing Unit
CRC Cyclic Redundancy Check
CRT Cathode Ray Tube
CS 1) Clear to Send
2) CompuServe
CSL 1) Computer Structure Language
2) Control and Simulation Language
CSS Cascading Style Sheet
CSMA Carrier Sense Multiple Access
CSV 1) Comma-Separated Value
2) Comma-Separated Variable
3) Circuit-Switched Voice
4) Common Services Verbs
CTS Clear To Send

D3D Direct 3D
DAT Digital Audio Tape
DB DataBase
DBA DataBase Administrator
DBCS Double-Byte Character Set
DBF DBase File
DBML DataBase Markup Language
DBMS Data Base Management System
DBRI Dual Basic Rate Interface
DC 1) Data Collection
2) Data Communication
3) Data Control
4) Device Control
5) Direct Current
6) Direct Connect
DCC 1) Data Country Code
2) Digital Command Control
3) Direct Client Connection
4) Direct Cable Connection
5) Display Combination Code
6) Digital Compact Cassette
DCD Data Carrier Detect
DCOM Distributed Component Object Model
DD Double Density
DDC 1) Document Description Language
2) Direct Digital Control
DDE Dynamic Data Exchange
DDoS Distributed Denial of Service attack
DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
DDR-RAM Double Data Rate-Random Access Memory
DDS Digital Data Storage
DHCP Dynamic Host Configuration Protocol
DIL Dual In-Line package
DIMM Dual In-line Memory Module
DIN Deutsche Industrie Norm
DIP 1) Dual In-line Plastic
2) Dual In-line Package
3) Dual Inline Package
DLC Data Link Control
DLCI Data Link Connection Identifier
DLE Data Link Escape
DLL Dynamic Link Library
DLT Digital Linear Tape
DMA Direct Memory Access
DMF high Density Media Format
DNA Digital Network Architecture
DNS Domain Naming System
DoS Denial of Service attack
DOS 1) Disk Operating System
2) Diskette Operating System
DPI Dots Per Inch
DPMI Dos Protected Mode Interface
DPMS Display Power Management Signaling
DQPSK Differential Quadrature Phase Shift Keying
DRAM Dynamic Random Access Memory
DS 1) Double Sided
2) Data Set ready
DSE 1) Data Switching Exchange
2) Data Switching Equipment
DSL 1) Digital Subscriber Line
2) Dynamic Simulation Language
DSLAM Digital Subscriber Line Access Multiplexer
DSN Distributed Systems Network
DSP 1) Digital Signal Processor
2) Digital Signal Processing
3) Domain Specific Part
4) Directory System Protocol
DSR Data Set Ready
DSTN Double Super Twisted Nematic
DTP DeskTop Publishing
DTR Data Terminal Ready
DVB Digital Video Broadcasting
DVD 1) Digital Versatile Disc
2) Digital Video Disc
DVD-R Digital Video Disk - Recordable
DVD-RAM 1) Digital Video Disc - Read Only Media
2) Digital Versatile Disc - Random Access Memory
DVD-ROM 1) Digital Video Disc - Read Only Media
2) Digital Versatile Disc - Read Only Media
DVE Digital Video Effect
DVI 1) Digital Video Interactive
2) Digital Visual Interface
DVM Digital Volt Meter
DVMRP Distance Vector Multicast Routing Protocol
DVOF Digital Video Over Fiber
DVR Digital Video Recorder
DW Data Warehousing
DWDM Dense Wavelength Division Multiplexer
DWG DraWinG
DWMT Discrete Wavelet Multitone
D2X Decimal To heXadecimal
DXC Data eXchange Control
DXF 1) Data eXchange File
2) Drawing eXchange Format
DXI Data Exchange Interface
DYNSLT DYNamic SeLecT
DYNSRC DYNamic SouRCe

E-MAIL Electronic MAIL
EA 1) Effective Address
2) Extended Attribute
3) Electronic Arts
EAI Enterprise Application Integration
EAR External Access Register
EARN European Academic Research Network
EAROM Electrically Alterable Read Only Memory
EARS 1) Electronic Access to Reference Services
2) Electronic Authoring and Routing System
3) Explicit Archive and Retrieval System
EATA Enhanced AT Bus Attachment
EAX Environmental Audio eXtensions
EB ExaByte
EBASIC Extended BASIC
EBC Eisa Bus Controller
EBCT Electron Beam Computed Tomography
EBCDIC Extended Binary Coded Decimal Interchange Code
EBI 1) Equivalent Background Input
2) Extended Background Investigation
EBIOS Extended Basic Input/Output System
EBNF Extended Backus-Naur Form
EBOOK Electronic BOOK
EBPP Electric Bill Presentment and Payment
EBT Electronic Benefits Transfer
EC 1) Electronic Commerce
2) Error Control
ECAL Enjoy Computing And Learn
ECAT Electronic Card Assembly and Test
ECB 1) Electronic CodeBook
2) Event Control Block
ECC 1) Error Checking and Correcting
ECC 2) Elliptic Curve Crypto
3) Error Check Code
4) Error Correction Code
ECD 1) Enhanced Color Display
2) Enhanced Compact Disk
ECHO European Commission Host Organization
ECI External Call Interface
ECL Emitter Coupled Logic
ECM Electronic Control Module
ECMA European Computer Manufacturers Association
ECN Electronic Communications Network
ECNE Enterprise Certified Netware Engineer
ECP 1) Extended Communication Port
2) Enhanced Capabilities Port
3) Extended Capabilities Port
ECS Enhanced Chip Set
ECTL Electronic Communal Temporal Lobe
ECU Eisa Configuration Utility
ED 1) Extra high Density
2) Erase Display
EDA 1) Electronic Design Automation
2) Embedded Document Architecture
EDB Embedded DataBase
EDC 1) Electronic Digital Computer
2) Enhanced Data Correction
3) Error Detection and Correction
EDDC Extended Distance Data Cable
EDE Encrypt-Decrypt-Encrypt
EDGAR Electronic Data Gathering, Analysis and Retrieval
EDGE Enhanced Data Gsm Environment
EDI 1) Electronic Data Interchange
2) Electronic Document Interchange
EDIF Electronic Design Interchange Format
EDIFACT EDI For Administration Commerce and Transport
EDL Edit Decision List
EDLC Ethernet Data Link Control
EDLIN EDitor (LINe text)
EDMS Electronic Document Management System
EDO Extended Data Out
EDO RAM Extended Data Output Random Access Memory
EDOS Enhanced DOS for windows
EDP Electronic Data Processing
EDPM Electronic Data Processing Machine
EDRAM 1) Enhanced Dynamic Random Access Memory
2) Eraseable Dynamic Random Access Memory
3) Extended Dynamic Random Access Memory
EDS Electronic Data Systems
EDSAC Electronic Delay Storage Automatic Computer
EDV Elektronische DatenVerarbeitung
EDVAC Electronic Discrete Variable Automatic Computer
EE Extended Edition
EEC Extended Error Correction
EEG ElectroEncephaloGram
EEL Epsilon Extension Language
EEM Extended Memory Management
EEMAC Electrical & Electronic Manufacturers of Canada
EEMS Enhanced Expanded Memory Standard
EEPROM Electrically Erasable Programmable Read-Only Memory
EES Escrow Encryption Standard
EFA Extended File Attribute
EFF Electronic Frontier Foundation
EFI 1) Electromechanical Frequency Interference
2) Electronics For Imaging
EFIGS English, French, Italian, German, Spanish
EFL Emitter Follower Logic
E-FORM Electronic FORM
EFS Encrypting File System
EFTS Electronic Funds Transfer System
EGA Enhanced Graphics Adapter
EGP Exterior Gateway Protocol
EGREP Extended Global Regular Expression Print
EHLLAPI Emulator High Level Language Application Programming Interface
EIA Electronic Industries Association
EIDE Enhanced Integrated Drive Electronics
EIGRP Enhanced Interior Gateway Routing Protocol
EIS Executive Information System
EISA 1) Extended Industry Standard Architecture
2) Enhanced Industry System Architecture
EJB Enterprise JavaBeans
EL 1) ElectroLuminescent
2) Erase Line
ELAN Emulated Local Area Network
ELC Embedded Linking and Control
ELEC Enterprise Local Exchange Carrier
ELF 1) Executable and Linking Format
2) Extremely Low Frequency
ELS Entry Level System
EM 1) Electronic Mail
2) End of Medium
3) Expanded Memory
EMA 1) Electronic Mail Association
2) Enterprise Management Architecture
3) Enterprise Memory Architecture
EMACS Editing MACroS
EMB Extended Memory Block
EMBARC Electronic Mail Broadcast to A Roaming Computer
EMC 1) ElectroMagnetic Compatibility
2) Enhanced Memory Chip +
3) Extended Math Coprocessor
4) E-Mail Connection
EMCC Eckert-Mauchly Computer Company
EMI ElectroMagnetic Interference
EMM Expanded Memory Manager
EMR 1) Electro-Magnetic Radiation
2) Enhanced Metafile Record
EMS 1) Expanded Memory Specification
2) Electronic Mail System
3) Electronic Message Service
4) Energy Management System
EMSAPI Extended Messaging Services Application Programming Interface
EMWAC European Microsoft Windows nt Academic Centre
ENDEC ENcoder/DECoder
ENDS ENDs Segment
ENIAC Electronic Numerical Integrator and Computer
ENQ ENQuiry
ENSS Exterior Nodal Switching Subsystem
EOA End Of Address
EOB End Of Block
EOC End Of Conversion
EOF 1) End Of File
2) Enterprise Objects Framework
EOI 1) End Of Interrupt
2) End Or Identify
EOJ End Of Job
EOL 1) End Of Line
2) End Of List
EOM End Of Message
EOR Exclusive OR
EOS 1) End Of String
2) Earth Observing System
EOSDIS Earth Observing System Data and Information System
EOT 1) End Of Table
2) End Of Text
3) End Of Tape
4) End Of Transmission
EP ElectroPhotographic engine
EPIC Explicitly Parallel Instruction Computing
EPL Effective Privilege Level
EPLD Electrically Programmable Logic Device
EPM 1) Enhanced editor for Presentation Manager
2) Enterprise Process Management
EPP 1) Enhanced Parallel Port
2) Extended Printer Port
EPROCESS Executive PROCESS
EPROM 1) Electrically Programmable Read Only Memory
2) Erasable Programmable Read Only Memory
EPSF Encapsulated PostScript Files
ERA Extended Registry Attributes
ERAS Electronic Routing and Approval System
ERD 1) Emergency Repair Disk
2) Entity Relationship Diagram
ERIC Educational Resources Information Center
EPROM Erasable Programmable Read Only Memory
EPS Encapsulated PostScript File
ERLL Enhanced RLL
ERMA Electronic Recording Method, Accounting
EROM Erasable Read Only Memory
EROS Earth Resources Observation System
ERP Enterprise Resource Planning
ERR ERRor
ER/RC Extended Result/Response Code
ERU Emergency Recovery Utility
ES Extra Segment
ESA 1) Enterprise Systems Architecture
2) European Space Agency
ESC 1) ESCape
2) Eisa System Component
ESCD Extended System Configuration Data
ESCM Extended Services Communications Manager
ESCON Enterprise System CONnection
ESC/P Epson Standard Code for Printers
ESD 1) Electronic Software Distribution
2) ElectroStatic Discharge
3) Emergency Startup Disk
ESDI 1) Enhanced Small Device Interface
2) Extended Standard Disk Interface
3) Enhanced System Device Interface
ESDRAM Enhanced Synchronous Dynamic Random Access Memory
ESF Extended SuperFrame
ESI 1) End System Identifier
2) Enhanced Serial Interface
ESMR Enhanced Specialized Mobile Radio
ESN Electronic Security Number
ESP 1) Emulation Sensing Processor
2) Enhanced Serial Port
3) Encapsulating Security Payload
4) Enhanced Service Provider
5) Enterprise System Platcorm
6) Estimated Selling Price
ESR Event Service Routine
ESS Electronic Switching System
ESU Electro-Static Unit
ET Enhancement Technology
ETACS Extended Total Access Communication System
ETANN Electrically Trainable Analog Neural Network
ETB End of Transmission Block
ETC 1) Electronic Toll Collection
2) Enhanced Throughput Cellular
E-TEXT Electronic TEXT
ETF Enriched Text Format
ETOM Electron-Trapping Optical Memory
ETPL Endorsed Tempest Products List
ETS Econometric Time Series
ETX End of TeXt
EU Execution Unit
EUC 1) End User Computing
2) Extended Unix Code
EUI End-User Interface
EULA End-User License Agreement
EVE Extensible Vax Editor
EVGA 1) Extended Video Graphics Array
2) Extended Video Graphics Adapter
EWAN Emulator Without A Good Name
EWS Employee Written Software
ExCA Exchangeable Card Architecture
EXE EXEcutable
EXP EXPonent
EXT EXTernal

FAN Fabric Area Network
FAQ Frequently Asked Questions
FAS Frame Alignment Sequence
FAT File Allocation Table
FCB File Control Block
FCBS File Control BlockS
FCC Federal Communications Commission
FCPGA Flip Chip Pin Grid Array
FCS Frame Check Sequence
FD Flat Display
FDDI 1) Fiber Distributed Data Interchange
2) Fiber Distributed Data Interface
FDM Frequency Division Multiplexing
FEC Fast Ethernet Channel
FECN Forward Explicit Congestion Notification
FEP Front End Processor
FF Form Feed
FHSS Frequency Hopping Spread Spectrum
FIFO First In First Out
FLOPS FLoating-point Operations Per Second
FLT Full Line Terminal
FM Frequency Modulation
FOIRL Fiber Optic Inter Repeater Link
FORTRAN FORmula TRANslation
FPGA Field Programmable Gate Array
FPLA Field Programmable Logic Array
FPLD Field Programmable Logic Device
FPM DRAM Fast Page Mode Dynamic Random Access Memory
FPS Frames Per Second
FPU Floating Point Unit
FQDN Fully Qualified Domain Name
FRAD Frame Relay Assembler Dissembler
FRAM Ferroelectric Random Access Memory
FRF Frame Relay Forum
FSAA Full-Screen Anti Alisasing
FSB Front Side Bus
FSTN Film compensated Super Twisted Nematic
FTAM File Transfer Access and Management
FTP File Transfer Protocol
FTT Free Topology Tranceiver
FXO Foreign eXchange Office
FXS Foreign eXchange Station

GaAs Gallium Arsenidi
GAIL Gate Array Interface Language
GAL Generic Array Logic
GAMM Gesellschaft für Ange-wandte Mathematik und Meckanik
GM 1) General Midi
2) Graphics Manager
GB 1) GigaByte
2) Gigatavu
GCA Genetic Compression Algorithm
GCR 1) Grey Component Replacement
2) Group-Coded Recording
GCRA Generic Cell Rate Algorithm
GDI Graphics Device Interface
GDS Generalized Data Stream
GE General Electric corporation
GEM Graphic Environment Management
GIF compuserve Graphic Image File
GILS Goverment Information Locator Service
GIS Geografical Information System
GKS Graphic Kernel System
GLI Gesellschaft für Logistik und Informationssysteme
GMD Gesellschaft für Mathematik und Datenverarbeitung
GMSK Gaussian Minimum Shift Keying
GND GrouND
GNU Gnu's Not Unix
GOSIP Government Open System Interconnection Profile
GPF General Protection Fault
GPIB General Purpose Interface Bus
GPM Geometric Product Models
GPS 1) General Problem Solver
2) Global Positioning System, navigation system with time and ranking
GPRS General Packet Radio Service
GPSS General Purpose Simulation System
GPU Graphics Prosessing Unit
GRID Global Resource Information Database
GS Group Separator
GSI Giga Scale Integration
GSS Group Support Systems
GT GigaTavu
GTDI Guidelines for Trade Data Interchange
GTEM Gigahertz Transverse Electro Magnetic
GTM-OSI General Telecommunication Manager for OSI
GUI Graphical User Interface
GUS Gravis UltraSound
GVNS Global Virtual Network Services
GW GateWay
GWBASIC Graphics and Windows BASIC

HAL 1) Human Access Language
2) Hard Array Logic
3) Hardware Abstraction Layer
4) House-Programmed Array Logic
HARC-C Houston Advanced Research Center Compression
HART Highway Addresseable Remote Transduser
HCI Human-Computer Interface
HCS Hard Clad Silica
HD 1) Half Duplex
2) Hard Disk
3) High Density
HDLC High-level Data Link Control
HDLC LAP(B) High-level Data Link Control, Link Access Procedure (Balanced)
HDSC High Density Signal Carrier
HDSL High bit-rate Digital Subscriber Line
HDX Half DupleX
HEC Header Error Control
HETI Helsinki stock Exchange automated Trading and Information system
HETKY HElsingin TietojenKäsittely-Yhdistys ry.
HEX HEXadecimal
HFDS Highly Functional Distributed System
HFFR Halogen Free, Fire Retardant
HGA Hercules Graphics Adapter
HGC Hercules Graphics Card
HGL Hewlett-packard Graphics Language image file
HHC Hand Held Computer
HIM Human Integrated Manufacturing
Hiperlan HIgh-Performance Radio Local Area Network
Hipernet High-Performance Radio Network
HIPO Hierarchical Input-Processing-Output
HiPPI High Performance Parallel Interface
HIS Honeywell Information Systems
HIT Hierarchical Interconnection Technology
hitec high technology
HLLAPI High Level Language Application Program Interface
HLM Heterogeous Lan Management
HLP HeLP
HLS Hue, Lightness, Saturation
HMA High Memory Area
HMD 1) Head Mounted Display
2) Helmet-Mounted Display
HMIC Hybrid Microwave Integrated Circuit
HMOS High-performance MOS
HNiL High Noise immunity Logic
HOT Holographic Optical Tracking
HP Hewlett-Packard company
HPFS High Performance File System
HPGL Hewlett-Packard Graphic Language
HPIB Hewlett-Packard Interface Bus
HPRL Heuristic Programming and Representational Language
HQS High Quality Screening
HR High Resolution
HS/Link samuel H. Smith Link
HSF Hierarchial File System
HSI Hue, Saturation, Intensity
HSM Hierarchical Storage System
HSSI High Speed Serial Interface
HST High Speed Technology
HSV Hue, Saturation, Value
HT 1) Henkilökohtainen Tietokone
2) Horizontal Tabulation
HTL High Threshold Logic
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
HW HardWare
HyTime Hypermedia Timebased document structuring language
Hz Hertz

I/O Input/Output
IAB Internet Architecture Board
IAC Inter Agent Communication
IAP Interfaces for Application Portability
IAR Instruction Address Register
IB Intelligent Building
IBCN Integrated Broadband Communication Network
IBI International Bureau for Informatics
IBM International Business Machines
IBM PCLP IBM PC-Lan Program
IBVA Interactive Brainwave Visual Analyzer
IC 1) Industrial Computer
2) Info Center
3) Insert Cursor
4) Integrated Circuit
5) Interface Controller
ICE In-Circuit Emulator
ICEMS Intra-Company Electronic Mail System
ICL International Computer Limited
ICM 1) Image Color Matching
2) Intel Configuration Manager
ICMP Internet Control Message Protocol
ICO 1) Intermediate Circular Orbit
2) ICOn
iCOMP intel COmparative Microprocessor Performance
ICOT Institute for new generation COmputer Technology
ICQ 'I Seek You'
ICT In-Circuit Testing
ICU Isa Configuration Utility
ID Identification
IDA Integrated Digital Access
IDAPI Integrated Database Application Programming Interface
IDC International Data Corporation
IDE 1) Integrated Drive Electronics
2) Intelligent Drive Electronics
IDE CHS Intelligent Drive Electronics Cylinder, Head, Sector
IDEA International Data Encryption Algorithm
IDGNS International Data Group News Service
IDI Initial Domain Identifier
IDN Integrated Digital Network
IDP 1) Integrated Data Processing
2) Internet Datagram Protocol
IDRP Interdomain Routing Protocol
IEC International Electrotechnical Commission
IEDM International Electron Devices Meeting
IEEE Institute of Electrical and Electronics Engineers
IEM Information Engineering Methodology
IEOS Integrated Electronic Office System
IET Image Enhancement Technology
IETF Internet Engineering Task Force
IEV International Electrotechnical Vocabulary
IFAC International Federation of Automatic Control
IFF Interchange File Format
IFIP International Federation of Information Processing
IFL Integrated Fuse Logic
IFPS Interactive Financial Planning System
IFR International Federation of Robotics
IFS Iterated Function System
IFSA International Fuzzy Systems Association
IGBT International Federation insulated Gate bipolar Transistor
IGES 1) Initial Graphics Exchange Standard
2) Initial Graphics Exchange Specification
IGFET Insulated Gate Field Effective Transistor
IGMP Internet Group Multicast Protocol
IGP Interior Gateway Protocol
IGRP Interior Gateway Routing Protocol
IIRIAM Institute International de Robotique et d'Intelligence Artificielle de Marseille
IKI Internet-Käyttäjät Ikuisesti iki ry
ILMI Interim Local Management Interface
IM-UAPDU Interpersonal Message User Agent Protocol Data Unit
IMDb the Internet Movie Database
IMD Insert Mounted Device
IMP Interface Message Processor
IMS Information Management System
IN Intelligent Network
INAS Interbank National Authorization Service
Indeo Intel Video Technology
INRIA Institut National de Recherche en Informatique et Automatique
INS Information Network Services
INT 1) Integer
2) Interrupt
INTUG International Telecommunications Users' Group
IOCS Input-Output Control System
IOP Input-Output Processor
IORDY I/O channel ReaDY
IP Internet Protocol
IPA 1) Information Processing Architecture
2) Information-technology Promotion Agency
IPC Institute for interconnecting and Packaging electronic Circuits
IPDU Internet Protocol Data Unit
IPI Intelligent Peripheral Interface
IPL Initial Program Load
IPng Internet Protocol next generation
IPNS Isdn Pbx Networking Signalling
IPO Input-Processing-Output
IPS 1) Internet Protocol Suite
2) Interruptible Power Supply
IPSE Integrated Project Support Environment
IPSO Internet Protocol Security Option
IPSS International Packet Switching Service
IPU image processing unit
IPX 1) Internet Packet eXchange protocol
2) Internet Package Xchange
IR 1) Information Retrieve
2) Infra Red
3) Instruction Register
IRC Internet Relay Chat
IrDA Infrared Data Association
IrDA-FIR Infrared Data Association Fast InfraRed data link standard
IrDA-MIR Infrared Data Association Medium InfraRed data link standard
IrDA-SIR Infrared Data Association Serial InfraRed data link standard
IRG Inter Record Gap
IRL Inter Repeater Link
IRM Information Resource Management
IRP Interior Router Protocol
IRPASS Interactive Robot Programming And Simulation System
IRTF Internet Resource Task Force
IRQ Interrupt ReQuest line
IS Indexed Sequential
IS-54 Interim Standard 54
ISA 1) Industry Standard Adapter
2) Industry Standard Architecture
ISAC Information System work and Analysis of Changes
ISAM Indexed Sequential Access Method
ISDN Integrated Services Digital Network
ISDOS Information System Design and Optimization System
ISDS/HOS Integrated Software Development System/Higher Oder Software
ISEE Integrated System Engineering Environment
ISHM International Society for Hybrid Microelectronics nordic
ISIS Image and Scanner Interface Standard
ISN Information Systems Network
ISO International Standard Organization
ISO/IEC JTC1 International Standard Organization/ International Electrotechnical Commission Joint Technical Committee 1
ISO IP International Standard Organization Internet Protocol
ISO TP International Standard Organization Transport Protocol
ISOC Internet SOCiety
IsoENET Isochronic EtherNET
ISP 1) Internet Service Provider
2) Interoperable System Project
ISPS/PC Interactive System Productivity System for PC
ISRM Initial Service Request Message
ISS 1) Information System Study
2) International Switching Symposium
ISSA Information Systems Security Association
ISSCC International Solid State Circuits Conference
ISUP ISdn User Part
ISX Information Switching eXchange
IT Information Technology
ITAA Information Technology Association of America
ITB Intermediate Text Block
ITEE Information-Technology Engineer Examination
ITG Intelligent Test Generator
ITI 1) Industrial Technology Institute
2) Interactive Terminal Interface
ITKY Imatran TietojenKäsittely-Yhdistys ry.
ITRC Information Technology Requirements Council
ITRON IndusTrial the Realtime Operating system Nucleus
ITU International Telecommunication Union
ITU-R International Telecommunication Union Radiocommunication
ITU-T International Telecommunication Union Telecommunication standardization sector
IVHS Intelligent Vehicle/Highway System
IVPN International Virtual Private Network
IVR Interactive Voice Responce
IWAN Integrated Wide Area Network
IWF InterWorking Funktio
IWU Internet Working Unit

JA 1) Jump Address
2) Jump if Above
JAD 1) Joint Application Design
2) Joint Application Development
JAE Jump if Above or Equal
JANET Joint Academic NETwork
JAR Java ARchive
JBE Jump if Below or Equal
JBOD Just a Bunch Of Drives
JC Jump if Carry set
JCL Job Control Language
JDBC Java Database Connectivity
JDK Java Development Kit
JE Jump if Equal
JEDEC Joint Electronic Device Engineering Council
JEIDA Japanese Electronics Industry Development Association
JEPI Joint Electronic Payment Initiative
JES Job Entry System
JESSI Joint European Submiron SIlicon
JFC Java Foundation Classes
JFET Junction Field Effect Transistor
JFIF Jpeg File Interchange Format
JFS Journaled File System
JG Jump if Greater
JGE Jump if Greater or Equal
JIPDEC Japan Information Processing DEvelopment Center
JIPS Janet Internet Protocol Service
JISA Japan Information Service industry Association
JIT Just-In-Time
JITEC Japan Information Technology Engineers examination Center
JL Jump if Less
JLE Jump if Less than or Equal to
JLIP Joint Level Interface Protocol
JMAPI Java Management Application Program Interface
JMF Java Media Framework
JMP JuMP
JMS Java Message Service
JNA Jump if Not Above
JNAE Jump if Not Above or Equal
JNB Jump if Not Below
JNBE Jump if Not Below or Equal
JNDI Java Naming and Directory Interface
JNG Jump if Not Greater
JNGE Jump if Not Greater or Equal
JNI Java Native Interface
JNLE Jump if Not Less or Equal
JNO Jump if No Overflow
JNP Jump if No Parity
JNS Jump if No Sign
JNZ Jump if Not Zero
JOE Java Objects Everywhere
JOHNNIAC John Neumann Integrator and Automatic Computer
JOSS Johnniac Open Shop System
JOVIAL Jules' Own Version of International Algorithmic Language
JPEG 1) Joint Photographics Expert Group
2) Joint Photographic Experts Group
JPL Jet Propulsion Laboratory
JPNF Join-Projection Normal Form
JPO Jump if Parity Odd
JRE Java Runtime Environment
JS Jump if Sign
JSD Jackson Structured Design
JSP 1) Jackson Structured Programming
2) Java Server Page
JSS Java-Script Style Sheet
JTAG Joint Testability Action Group
JTAPI Java Telephony Application Programming Interface
JTC Joint Technical Commission
JTM Job Transfer and Manipulation
JUGHEAD Jonzy's Universal Gopher Hierarchy Excavation and Display
JUHA JUlkisHAllinnon palveluverkko
JVM Java Virtual Machine
JZ Jump if Zero

K Kilo
KAM Keep Alive Memory
KANTTI KANTa-Hämeen TIetojenkäsittelyyhdistys ry.
KATI Kotimaisten Aikakauslehtiartikkeleiden TIetokanta
KATKO Kunnallishallinnon ATK-neuvOttelukunta
KB KeyBoard
Kb 1) Kilobit
2) Kilobitti
kB 1) kiloByte
2) kilotavu
KBD KeyBoarD
KBE Knowledge Based Engineering
Kbps Kilobits per second
KBps KiloBytes per second
KBS Knowledge Base System
KC Knowledge Compiler
KDT Key Definition Table
KEFIR KEy FIndings Reporter
KEE Knowledge Engineering Environment
KES Knowledge Engineering System
KETKY KEski-suomen TietojenKäsittely-Yhdistys ry.
KEYB KEYBoard
kHz 1) kiloHertz
2) kiloHertsi
KIF Knowledge Interchange Format
KIPS Knowledge Information Processing System
KIS Knowbot Information Service
KPI Kernel Programming Interface
KQML Knowledge Query and Manipulation Language
KRL 1) Knowledge Representation Language
2) Knowledge Retrieval System
KSDS Keyed Sequential Data Set
KSH Korn SHell
KSPH Keystrokes Per Hour
KSR Keyboard Send Receive
KT KiloTavu
KULTU KULuttajaTUtkimuksen tietokanta
KVM 1) Keyboard, Video, Mouse
2) Kilobyte Virtual Machine
kw 1) KiloWord
2) kilosana
KWIC KeyWord In Context
KYTKY KYmen TietojenKäsittely-Yhdistys ry.

LADDR Layered Device Driver Architecture
LAN Local Area Network
LAPB Link Access Procedure Balanced
LAPD Link Access Procedure on the D-Channel
LAPM Link Access Procedure for Modems
LAT Local Area Transport
LBA Logical Block Address
LBM deLuxe paint BitMap
LCA Lonworks Component Architecture
LCS Liquid Crystal Shutter
LD Low Density
LDA Logical Device Address
LDAP Lightweight Directory Access Protocol
LED Light Emitting Diode
LF Line Feed
LFN Long File Names
LH LoadHigh
LIM Lotus, Intel, Microsoft
LIM EMS Lotus, Intel, Microsoft Expanded Memory Specification
LISP LISt Processing
LM/X Lan Manager uniX
LNS Lonworks Network Services
LON Local Operating Network
LPI Link Power Interface
LPT Line PrinTer

MAC 1) MACintosh
2) MACpaint
3) Media Access Control
MAN Metropolitan Area Network
MAU 1) Media Access Unit
2) Media Adapter Unit
3) Multistation Access Unit
MB MegaByte
MBR Master Boot Record
MCA Micro Channel Architecture
MCGA Memory Controller Gater Array
MCI Media Control Interface
MDA Monochrome Display Adapter
MDRAM Multibank Random Access Memory
MFM Modified Frequency Modulation
MFR Monthly Failure Rate
MGA Hercules Monochrome Graphics Adapter
MHS Message Handling System
MHz 1) MegaHertZ
2) MegaHertsi
MIDI Musical Instrument Digital Interface
MIPS Millions of Instructions Per Second
MMX MultiMedia eXtensions
MO Magneto Optical, Magneettis-Optinen
MP3 MPeg-1 layer 3
MPC Multimedia Personal Computer
MPEG Motion Picture Expert Group standard
MPU MicroProcessor Unit
MS MicroSoft
MS-DOS MicroSoft Disk Operating System
MSA My Second Address
MSCDEX MicroSoft CD ROM Extensions
MSD MicroSoft Diagnostics
MSP MicroSoft Paint
MSW Machine Status Word
MT MegaTavu
MTBF Mean Time Betveen Failure
MVS Multiple Virtual Storage
MVT Multiprogramming with a Variable number of Tasks
MZR Multiple Zone Recording

NAC Network Adapter Card
NACD National Association of Computer Dealers
NACS National advisory Committee on Semiconductors
NAE Not Above or Equal
NAK Negative AcKnowledgment
NAL Novell Application Launcher
NAM Number Assignment Module
NAMPS Narrow-band Analog Mobile Phone Service
NAND Not AND
NAP Network Access Point
NAPLPS North American Presentation Level Protocol Syntax
NAS 1) Network Access Server
2) Network Attached Storage
3) Network Application Support
NASA National Aeronautics and Space Administration
NASI Netware Asynchronous Services Interface
NASIRC Nasa Automated Systems Internet Response Capability
NASKER Nasa Ames KERnel
NAT Network Address Translation
NAU Network Addressable Unit
NAVSTAR NAVigation Satellite Timing And Ranging
NAWS Negotiate About Window Size
NBE Not Below or Equal
NBI Nothing But Initials
NBMA Non-Broadcast Multi Access
NBP NetBios Plus
NBS 1) Narrowband Socket
2) National Bureau of Standards
3) Numeric Backspace
NC 1) Network Computer
2) No Carry
3) Numerical Control
NCA 1) Network Communications Adapter
2) Network Computing Architecture
NCC Network Control Center
NCD Network Computing Device
NCGA National Computer Graphics Association
NCI Network Configurate Input
NCIC National Crime Information Center
NCMT Numerical Control for Machine Tools
NCOS Network Computer Operating System
NCP 1) Netware Core Protocol
2) Not Copy Protected
3) Network Control Processor/Program/Protocol
NCR National Cash Register
NCSA National Center for Supercomputing Applications
NCSC National Computer Security Center
NCSI Network Communications Services Interface
NDB Non-Directional Beacon
NDDK Network Device Development Kid
NDEF Not to be DEFined
NDIS Network Device Interface Specification
NDL Network Data Language
NDMP Network Data Management Protocol
NDN Non-Delivery Notice
NDP Numeric Data Processor
NDR Network Data Representation
NDRO Non-Destructive Read Out
NDS Neteare Directory Service
NEC Nippon Electric Company
NED Nas Extragalactic Database
NEG 1) NEGative
2) NEGate
NEMA National Electrical Manufacturers Association
NEP Network Entry Point
NES National Education Supercomputer
NEST Novell Embedded Systems Technology
NETBEUI NETBios Extended User Interface
NETBIOS NETwork Basic Input Output System
NETMON NETwork MONitor
NEWS 1) NetWare Early Warning System
2) Network Extensible Window System
NEXT Near-End crossTalk
NFF No Fault Found
NFS Network File System
NG No Good
NGE Not Greater or Equal
NGI Next-Generation Internet
NHC National Hurricane Center
NHR National Handwriting Recognition
NHRP Next Hop Resolution Protocol
N/I Non-Interlaced
NIA Next Instruction Address
NIC 1) Network Interface Card
2) Network Information Center
3) Numeric Intensive Computing
NICAD 1) NIkkeli-KADmium
2) NIckel-CADmium
NICOLAS Network Information Center OnLine Aid System
NID 1) New Interactive Display
2) Next ID
NII National Information Infrastructure
NIM Network Installation Management
NIMH 1) NIkkeli-MetalliHydridi
2) NIckel-Metal Hydride
NIO Native Input/Output
NIPS Network I/os Per Second
NIR Network Information Retrieval
NIS Network Information Service
N-ISDN 1) Narrowband ISDN
2) National ISDN
NISO National Information Standards Organization
NISP Networked Information Services Project
NIST National Institute for Standards and Technology
NITC National Information Technology Center
NIU Network Interface Unit
NJE Network Job Entry
NL New Line
NLE Not Less or Equal
NLM Netware Loadable Module
NLP Natural-Language Processing
NLQ Near Letter Quality
NLSFUNC National Language Support FUNCtion
NLV National Language Version
NMI Non-Maskable Interrupt
NMM NetWare Management Map
NMOS Negative channel Metal-Oxide Semiconductor
NMP Network Management Protocol
NMS Network Management System
NN 1) Network Node
2) No News
NNI Network to Network Interface
NNM Network Node Manager
NNTP Network News Transfer Protocol
NOC Network Operations Center
NOP No OPeration
NOPAC Network OPAC
NOR Not Or
NOS Network Operating System
NPA 1) Network Printer Alliance
2) Numbering Plan Area
NPI Network Printer Interface
NPL NonProcedural Language
NPS Novell Productivity Specialist
NPT Non-Programmable Terminal
NPTN National Public Telecomputing Network
NPU Natural Processing Unit
NPX Numeric Processor eXtension
NQS Network Queuing System
NRC National Research Council (canada)
NREN National Research and Education Network
NRM Network Resource Manager
NRZ Not Return to Zero
NRZI Non Return to Zero Inverted
NS 1) NanoSecond
2) National Semiconductor
3) Network Supervisor
4) Non Stop
NSAP Network Service Access Point
NSAPI Netscape Server API
NSA POLY National Security Agency POLYgraph
NSERC National Sciences and Engineering Research Council (canada)
NSF National Science Foundation
NSFNET National Science Foundation NETwork
NSI Nasa Science Internet
NSLOOKUP Name Server LOOKUP
NSM Netscape Server Manager
NSP 1) Native Signal Processing
2) Network Services Protocol
3) Network Service Provider
NSS Network Services Server
NSSC Nasa Standard Spacecraft Computer
NSTC National Science and Technology Council
NSTL National Software Testing Labs
NT New Technology
NT-1 Network Terminator type 1
NTAS NT Advanced Server
NTF No Trouble Found
NTFS New Technology File System
NTIA National Telecommunications and Information Administration
NTIS National Technical Information Service
NTP Network Time Protocol
NTRAS NT Remote Access Services
NTSA NetWare Telephony Services Architecture
NTSC National Television Standards Committee
NTU Network Termination Unit
NUI 1) Network User Identification
2) Network User Interface
3) Notebook User Interface
NUL NULl
NUMA Non-Uniform Memory Access
NV No oVerflow
NVM Non-Volatile Memory
NVOD Near-Video On Demand
NVP Nominal Velocity of Propagation
NVRAM Non-Volatile Random Access Memory
NVT 1) Network Virtual Terminal
2) Novell Virtual Terminal
NWS Netware Web Server
NYM anoNYMous

OA Office Automation
OADM Optical Add & Drop Multiplexer
OAG Official Airline Guide
OAIS Open Archival Information System
OAM 1) Object Access Method
2) Operation And Maintenance
OC Optical Carrier
OCE Open Collaboratorio Environment
OCF Object Components Framework
OCR 1) Optical Character Regognition
2) Optical Character Reading
OCS Original Chip Set
ODBC 1) Open DataBase Connectivity
2) Open DataBase Computing driver
ODBS Open DataBase Connectivity
ODI Open Data-link Interface
OEM Original Equipment Manufacturer
OFDM Orthogonal Frequency Division Multiplexing
OGL Open Graphics Library
OLA Optical Line Amplification
OLAP OnLine Analytical Processing
OLE 1) Object Linked Embedded
2) Object Linking and Embedding
OLEDB Object Linked Embedded DataBase
OLTP OnLine Transaction Processing
OMAP Open Multimedia Application Platform
OMEN Offline Message ENvironment
O-MSP Optical Multiplex Section Protection
OMT Object Modeling Technique
OMT Object Modelling Technique
OPC Ole for Process Control
OpenGL Open Graphics Library
ORB Object Request Broker
ORDBMS Object Relational DataBase Management System
OS Operating System
OSI Open System Interconnection
OSI RM Open System Interconnection Architecture Reference Model
OSITOP Open System Interconnection Technical and Office Protocol
OSPF Open Shortest Path First
OSR2 Operating System Release 2
OU Organization Unit
OVR OVeRlay

Pas Pascal
PBM Portable BitMap
PC Personal Computer
PC-DOS Personal Computer Disk Operating System
PCB 1) Printed Circuit Board
2) Program Control Block
PCC PC Card
PCD Photo CD
PCI Peripheral Connection Interface
PCL Printer Control Language
PCLP PC Lan Program
PCLTA PC LonTalk Adapter
PCM 1) Pulse Code Modulation
2) Personal Computer Manufacturer
3) Printer Cartridge Metric
PCMCIA Personal Computer Memory Card International Association
PDA Personal Digital Assistant
PDF Portable Document Format
PDLI Page Description Language
PEL Picture ELement
PGA 1) Professional Graphics Adapter
2) Pin Grid Array
PGM Portable GrayMap
PHP Php Hypertext Preprocessor
PIF Program Information File
PIO 1) Parallel Input/Output
2) Processor Input/Output
3) Programmed Input/Output
PL/C Programming Language/Cornell
PLC 1) Power Line Communications
2) Programmable Logic Controller
3) Power Line Carrier
PLT Power Line Tranceiver
PNA Programmable Network Access
PNG Portable Network Graphics
PnP Plug and Play
POH Power On Hour
POP Post Office Protocol
POS Programmable Option Select
POSIX Portable Operating System Interface for uniX
POST Power On Self Test
POTS 1) Plain Old Telephone Service
2) Plain Old Time-Sharing
PPM 1) Pages Per Minute
2) Portable PixelMap
PPN Peer-to-Peer Networking
PPP Point-to-Point Protocol
PPPOE Point-to-Point Protocol Over Ethernet
PPS 1) Packets Per Second
2) Power Personal Systems
PPTP Point-to-Point Tunneling Protocol
PQFP Plastic Quad Flat Pack
PRN PRiNter port
PS 1) Personal System
2) Proportional Spacing
PS/2 Programming System 2
PSC 1) Personal Super Computer
2) Print Server Command
3) Product Service Center
PSSC Public Service Satellite Consortium
PSTN Public Switched Telephone Network
PT 1) Payload Type
2) Posti-Tele
3) Program Tab

QAM Quadrature Amplitude Modulation
QBASIC Quick BASIC
QBE Query By Example
QBIC Query By Image Content
QCIF Quarter Common Intermediate Format
QCL Quickly Customized Logic
QEMM Quarterdeck Expanded Memory Manager
QFP Quad Flat Pack
QIC Quarter Inch Cartridge
QL 1) Quantum Leap
2) Query Language
QLLC Qualified Logical Link Control
QNX Quick uNiX
QOS Quality Of Service
QPSK Quadrature Phase-Shift Keying
QPSX Queue Packet and Synchronous Circuit Exchange

RACF Resource Access Control Facility
RADIUS Remote Authentication Dial-in User Service
RADSL Rate Adaptive Asymmetric Digital Subscriber Line
RAID 1) Redundant Array of Independent Disks
2) Redundant Array(s) of Inexpensive Disks
RAM Random Access Memory
RARP Reverse Address Resolution Protocol
RAS 1) Remote Access Server
2) Remote Access Service
3) Riktlinjer för Administrativa System
RB Read Buffer
RBS Robbed-Bit Signaling
RD Receive Data
RDBMS Remote Data Base Management System
RDNIS Redirected Dial Number Id Service
RDP 1) Remote Desktop Protocol
2) Reliable Datagram Protocol
RDRAM Rambus Dynamic Random Access Memory
RED Random Early Detection
REL Release Message
RET Resolution Enhancement Technology
REXX Restructured Extended Executor
RF Radio Frequency
RFC Request For Comments
RFT Revisable Form Text
RGB Red Green Blue
RI Ring Indicator
RI Routing Information
RIC Real Time Interface Co-processor
RIF Routing Information Field
RIFF Resource Interchange File Format
RIM Research In Motion
RIMM Rambus In-line Memory Modules
RIP 1) Raster Image Processor
2) Routing Information Protocol
RISC 1) Reduced Instruction of Set Computer
2) Reduced Instruction Set Computer
RJE Remote Job Entry
RLE Run Length Encoded
RLL Run Length Limited
RLOGIN Remote LOGIN
RLP Radio Link Protocol
RM Rate Management
RMI Remote Method Invocation
RMON Remote Monitor
RMS Root Mean Square
RNR Receive Not Ready
ROM Read Only Memory
ROSE Remote Operations Services Element
RPC Remote Procedure Call
RPM 1) Rotations Per Minute
2) Revolutions Per Minute
RR Receiver Ready
RRAS Routing and Remote Access Service
RRQ Registration ReQuest
RS Request to Send
RS/6000 RISC System/6000
RSA Rivest-Shamir-Adelman
RSH Remote SHell
RSRB Remote Source Route Bridging
RSVP Resource reSerVation Protocol
RTC Real Time Clock
RTCP Real-Time Transport Control Protocol
RTF Rich Text Format
RTIC Real Time Interface Co-processor
RTM Response Time Monitor
RTMP Routing Table Maintenance Protocol
RTP Real Time Protocol
RTPM Real Time Performance Monitor
RTS Request To Send
RTSP Real-Time Streaming Protocol
RU Request Unit
RxD Receive Data

SaMBA Smart and Modular Building Automation
SAN 1) Storage Area Network
2) System Area Network
SAP 1) Service Access Point
2) Service Advertising Protocol
SB Sound Blaster
SB16 Sound Blaster 16
SCSI Small Computer System(s) Interface
SD Single Density
SDA Send Data with Acknowledge
SDH Synchronous Digital Hierarchy
SDL Specification and Design Language
SDLC Synchronous DataLink Control
SDP Session Description Protocol
SDRAM Synchronous Dynamic Random Access Memory
SDSL 1) Single-Line Digital Subscriber Line
2) Symmetric Digital Subscriber Line
SET Secure Electronic Transactions
SGRAM Synchronous Graphics Random Access Memory
SID 1) Security IDentifier
2) Station IDentification
3) Serial Input Data
4) Symbolic Interactive Debugger
5) System ID
SIMM Single Inline Memory Module
SIPP Single Inline Pin Package
SLDRAM SyncLink Dynamic Random Access Memory
SLED Single Large Expensive Disk
SLI Scan Line Interleave
SLIP Serial Line Interface Protocol
SLTA Serial LonTalk Adapter
SMB Server Message Block
SMD Storage Module Device
SMM System Management Mode
SMNP Simple Network Management Protocol
SMP 1) SiMetrical Prosessing unit
2) Simple Management Protocol
3) Symbolic Manipulation Program
4) Symmetrical Multi-Processing
5) Symmetric MultiProcessor
SMS 1) System Management Server
2) System Managed Storage
SMTP Simple Mail Transfer Protocol
SNA Systems Network Architecture
SNI 1) Siemens Nixdorf Informationsysteme ag
2) SNA Network Interconnection
3) Subscriber Network Interface
SNMP Simple Network Management Protocol
SNVT Standard Network Variable Type
SOHO Small Office / Home Office
SOS 1) Silicon-On-Sapphire
2) Sophisticated Operating System
S/PDIF Sony Philips Digital InterFace
SPX Sequenced Packet Exchange
SQL Structured Query Language
SRAM Static Random Access Memory
SS Single Sided
SSH Secure SHell
STN Super Twisted Nematic
STP Shielded Twisted Pair
SVCD Super VideoCD
SVGA Super Video Graphics Array

TAC Technical Assistance Center
TAD Technical Audio Device
TAPI Telephony Application Program Interface
Tarkki Tietokonearkkitehtuuri(t)
TB 1) Tera Bytes
2) Transmit Buffer
TC Transmit Clock
TCA Target Channel Adapter
TCO Total Cost of Ownership
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TD Transmitted Data
TDM Time Division Multiplexing
TDMA Time Division Multiple Access
TDR Time Domain Reflectometer
TELNET TELecommunications NETwork protocol
TETRA 1) TErrestrial Trunked RAdio
2) TransEuropean Trunking RAdio
TFLOPS Tera FLoating-point Operations Per Second
TFT Thin Film Transistor
TFTP Trivial File Transfer Protocol
TGA Truevision Graphics
TI Texas Instruments
TIC Token-Ring Interface Coupler
TIFF Tagged Image File Format
TIGA Texas Instruments Graphics Architecture
TL Tuomas Lehtinen
TLS Transport Level Security
TN Twisted Nematic
TOS Type Of Service
TP Twisted Pair
TPF Transaction Processing Facility
TPT Twisted Pair Tranceiver
TPU Text Processing Utility
TR 1) Token-Ring
2) Terminal Ready
TSAP Transport Service Access Point
TSAPI Telephony Services API
TSI Transmitting Subscriber Information
TSO Time Sharing Option
TSR Terminate and Stay Resident
TTCN Tree and Tabular Combined Notation
TTD Temporary Text Delay
TTF True Type Font
TTL 1) Time To Live
2) Transistor-Transistor Logic
TTY Teletype
TUI Telephony User Interface
TWAIN Technology Without Any Interesting Name
TxD Transmit Data

UA Unnumbered Acknowledgement
UART Universal Asynchronous Receiver Transmitter
UBR Unspecified Bit Rate
UDB Universal DataBase
UDDI Universal Description, Discovery and Integration
UDMA Ultra-DMA
UDP User Datagram Protocol
UI User Interface
UID User IDentification
UIO Universal I/O
UKK Usein Kysytyt Kysymykset
UMA Upper Memory Area
UMB Upper Memory Block
UML Unified Modeling Language
UMTS Universal Mobile Telephone System
UNC Universal Naming Convention
UNI User Network Interface
UNIX UNIpleX information and computer services
UPS 1) Uninterruptable Power Supply
2) Uninterruptable Power System
3) Uninterrupted Power Supply
URI Uniform Resource Identifier
URL 1) Universal Resource Locator
2) Uniform Resource Locator
URN Uniform Resource Name
USART Universal Synchronous Asynchronous Receiver / Transmitter
USB Universal Serial Bus
USCW Uncacheable Speculative Write Combining
USOC Universal Service Order Codes
USPARC Ultra Scalable Processor Architecture Reduced instruction set Computer
UTP Unshielded Twisted Pair

VAN Vehicle Area Network
VB Visual Basic
VBE Vesa Bios Extensions
VBM Virtual Bandwidth Management
VBR Variable Bit Rate
VC Virtual Circuit
VCD VideoCD
VCPI Virtual Control Program Interface
VDM Virtual Device Metafile
VDSL Very high bit-rate Digital Subscriber Line
VDU 1) Video Display Unit
2) Visual Display Unit
VESA Video Electronics Standards Association
VFW Video For Windows
VGA Video Graphics Array
VHD Very High Density
VISP Virtual Internet Service Providers
VL Value Line
VLAN Virtual Local Area Network
VLB VESA Local Bus
VLM Virtual Loadable Module
VLSI Very Large Scale Integration
VLSM Variable Length Subnet Mask
VM / CMS Virtual Machine / Conversational Monitor System
VMI Video Module Interface
VMM Virtual Memory Management
VMS Virtual Machine / Storage
VOFR Voice Over Frame Relay
VOIC VOice Interface Card
VOIP Voice Over IP
VP 1) Value Point
2) Virtual Path
VPC Virtual Path Connection
VPCI Virtual Path Connection Identifier
VPN Virtual Private Network
VR Virtual Reality
VRAM Video Ranmdom Access Memory
VRAM Volatile Random Access Memory
VRML Virtual Reality Modeling Language
VSAM Virtual Storage Access Method
VTAM Virtual Telecommunications Access Method
VTN Virtual Telephony Network
VTSP Voice Telephony Service Provider
VxD Virtual device Driver
VXD Virtual eXtended memory Driver
VXI Vmebus eXtension for Instrumentation

WACK Wait before transmit, a positive ACKnowledgement
WAIS Wide Area Information Service
WAN Wide Area Network
WAP Wireless Application Protocol
WAV WAVeform audio file
WD 1) Working Draft
2) Western Digital
WFL Work Flow Language
WfW Windows for Workgroup
WfWG Windows for WorkGroup
WIMP Windows-Icons-Mouse-Pull down-pop up menus
WIN 1) WINdows
2) Wireless In-building Network
WINS Windows Internet Name Service
Winsock Windows socket
WISE Wang Inter-System Exchange
WLAN Wireless Local Area Network
WMF Windows MetaFile
WML Wireless Markup Language
WORM Write Once Read Many
WOSA Windows Open Services Architecture
WOW Windows On Windows
WP 1) WordPerfect
2) Word Processing
WPG WordPerfect Graphic
WPM 1) Windows Presentation Manager
2) Word Per Minute
WPMA Windows & Presentation Manager Association
WPS Word Processing System
WRAM Window Random Access Memory
WS WordStar
WT Windows Telephone
WTP 1) Wireless Transaction Protocol
2) Wireless Transfer Protocol
WUGNET national Windows User Group NETwork
WUGOF Windows User Group Of Finland
WWW World Wide Web
WYSIWYG What You See Is What You Get
WYSIWYP What You See Is What You Print

X2B heXadecimal to Binary
X2C heXadecimal to Character
X2D heXadecimal to Decimal
XA 1) eXtended Architecture
2) eXtended Attribute
XAML eXtensible Authority Markup Language
XAPIA X.400 Application Program Interface Association
XBA Xtreme Bandwidth Architecture
XCHG eXCHanGe
XCMD eXternal CoMmanD
XCON eXpert CONfigurer (of vax)
XCOPY eXtended COPY
XDF eXtended Density Format
XDMP X Desktop Manager Control Protocol
XDR 1) eXternal Data pResentation
2) eXtended Data Representation
3) eXternal Data Representation
4) Xml Data Reduced
XFCN eXternal FunCtioN
XFDL eXtensible Forms Description Language
XFS eXtensions for Financial Services
XGA eXtended Graphics Array
XHTML eXtensible HyperText Markup Language
XID 1) eXchange IDentification
2) eXchange IDentifier
XIOS eXtended Input/Output System
XIP eXecute In Place
XLF eXceptionaL Fortran
XLL eXtensible Link Language
XLM eXceL Macro language
XMCP X Display Manager Control Protocol
XML eXtensible Markup Language
XMM eXtended Memory Manager
XMP X/open Management Protocol
XMS eXtended Memory Specification
XNS 1) Xerox Network Services
2) Xerox Network System
X-OFF eXchange OFF
X-ON eXchange ON
XOR eXclusive OR
XOT X.25 Over Tcp-ip
XP eXtreme Performance
XPG3 X/open Portability Guide issue 3
XPRM Xerox Print Resources Manager
XRNS eXtensible Resource Name System
XRT eXtensions for Real-Time
XSL 1) eXtensible Stylesheet Language
2) eXtensible Style Language
XSMD eXtended Storage Module Drive
XSSI eXtended Server Side Includes
XT eXtended Technology
XTCLK eXternal Transmit CLoCk
XTP eXpress Transport Protocol
XUL eXtensible User-interface Language
XVGA eXtended Video Graphics Array

Y/N Yes/No
Y2K Year 2000
YABA Yet Another Bloody Acronym
YAFIYGI You Asked For It, You Got It
YAHOO Yet Another Hierarchically Officious Oracle
YAM Yet Another Modem
YDV Yleinen DataVerkko
YES/MVS Yorktown Expert System for Multiple Virtual Storage
YKM YhteisKanavaMerkinanto
YKMV YhteisKanavaMerkinantoVerkko
YP Yellow Pages
YPV Yleinen PuhelinVerkko
YSM Yourdon Structured Method
YTD Year To Date

Z-CAV 1) Zone Constant Angular Velocity
2) Zoned Constant Angular Velocity
ZAK Zero Administration Kit
ZAW Zero Administration for Windows
ZBR 1) Zoned Bit Recording
2) Zone-Bit Recording
ZDL Zero Delay Lockout
ZDS Zenith Data Systems
ZIF Zero Insertion Force
ZIP 1) Zone Information Protocol
2) Zigzag In-line Package
ZPV Zoomed Port Video
ZSL Zero Slot Lan
ZZF Zentralamt für Zulassungen im Fernmedeldewesen

Verkkotunnukset (kansalliset ja geneeriset juuret) (Top Level Domains)
lis„tietoja:
http://www.iso.ch/cate/0114030.html
http://cgi.thk.fi/html/fdomains.htm
Kaikki verkkotunnukset

AD Andorra
AE United Arab Emirates
AF Afghanistan
AG Antigua and Barbuda
AI Anguilla
AL Albania
AM Armenia
AN Netherlands Antilles
AO Angola
AQ Antarctica
AR Argentina
AS American Samoa
AT Austria
AU Australia
AW Aruba
AZ Azerbaijan
BA Bosnia and Herzegovina
BB Barbados
BD Bangladesh
BE Belgium
BF Burkina Faso
BG Bulgaria
BH Bahrain
BI Burundi
BJ Benin
BM Bermuda
BN Brunei Darussalam
BO Bolivia
BR Brazil
BS Bahamas
BT Bhutan
BV Bouvet Island
BW Botswana
BY Belarus
BZ Belize
CA Canada
CC Cocos (Keeling) Islands
CF Central African Republic
CG Congo
CH Switzerland
CI Cote D'Ivoire (Ivory Coast)
CK Cook Islands
CL Chile
CM Cameroon
CN China
CO Colombia
CR Costa Rica
CS Czechoslovakia (former)
CU Cuba
CV Cape Verde
CX Christmas Island
CY Cyprus
CZ Czech Republic
DE Germany
DJ Djibouti
DK Denmark
DM Dominica
DO Dominican Republic
DZ Algeria
EC Ecuador
EE Estonia
EG Egypt
EH Western Sahara
ER Eritrea
ES Spain
ET Ethiopia
FI Finland
FJ Fiji
FK Falkland Islands (Malvinas)
FM Micronesia
FO Faroe Islands
FR France
FX France, Metropolitan
GA Gabon
GB Great Britain (UK)
GD Grenada
GE Georgia
GF French Guiana
GH Ghana
GI Gibraltar
GL Greenland
GM Gambia
GN Guinea
GP Guadeloupe
GQ Equatorial Guinea
GR Greece
GS S. Georgia and S. Sandwich Isls.
GT Guatemala
GU Guam
GW Guinea-Bissau
GY Guyana
HK Hong Kong
HM Heard and McDonald Islands
HN Honduras
HR Croatia (Hrvatska)
HT Haiti
HU Hungary
ID Indonesia
IE Ireland
IL Israel
IN India
IO British Indian Ocean Territory
IQ Iraq
IR Iran
IS Iceland
IT Italy
JM Jamaica
JO Jordan
JP Japan
KE Kenya
KG Kyrgyzstan
KH Cambodia
KI Kiribati
KM Comoros
KN Saint Kitts and Nevis
KP Korea (North)
KR Korea (South)
KW Kuwait
KY Cayman Islands
KZ Kazakhstan
LA Laos
LB Lebanon
LC Saint Lucia
LI Liechtenstein
LK Sri Lanka
LR Liberia
LS Lesotho
LT Lithuania
LU Luxembourg
LV Latvia
LY Libya
MA Morocco
MC Monaco
MD Moldova
MG Madagascar
MH Marshall Islands
MK Macedonia
ML Mali
MM Myanmar
MN Mongolia
MO Macau
MP Northern Mariana Islands
MQ Martinique
MR Mauritania
MS Montserrat
MT Malta
MU Mauritius
MV Maldives
MW Malawi
MX Mexico
MY Malaysia
MZ Mozambique
NA Namibia
NC New Caledonia
NE Niger
NF Norfolk Island
NG Nigeria
NI Nicaragua
NL Netherlands
NO Norway
NP Nepal
NR Nauru
NT Neutral Zone
NU Niue
NZ New Zealand (Aotearoa)
OM Oman
PA Panama
PE Peru
PF French Polynesia
PG Papua New Guinea
PH Philippines
PK Pakistan
PL Poland
PM St. Pierre and Miquelon
PN Pitcairn
PR Puerto Rico
PT Portugal
PW Palau
PY Paraguay
QA Qatar
RE Reunion
RO Romania
RU Russia
RW Rwanda
SA Saudi Arabia
Sb Solomon Islands
SC Seychelles
SD Sudan
SE Sweden
SG Singapore
SH St. Helena
SI Slovenia
SJ Svalbard and Jan Mayen Islands
SK Slovak Republic
SL Sierra Leone
SM San Marino
SN Senegal
SO Somalia
SR Suriname
ST Sao Tome and Principe
SU USSR (former)
SV El Salvador
SY Syria
SZ Swaziland
TC Turks and Caicos Islands
TD Chad
TF French Southern Territories
TG Togo
TH Thailand
TJ Tajikistan
TK Tokelau
TM Turkmenistan
TN Tunisia
TO Tonga
TP East Timor
TR Turkey
TT Trinidad and Tobago
TV Tuvalu
TW Taiwan
TZ Tanzania
UA Ukraine
UG Uganda
UK United Kingdom
UM US Minor Outlying Islands
US United States
UY Uruguay
UZ Uzbekistan
VA Vatican City State (Holy See)
VC Saint Vincent and the Grenadines
VE Venezuela
VG Virgin Islands (British)
VI Virgin Islands (U.S.)
VN Viet Nam
VU Vanuatu
WF Wallis and Futuna Islands
WS Samoa
YE Yemen
YT Mayotte
YU Yugoslavia
ZA South Africa
ZM Zambia
ZR Zaire
ZW Zimbabwe
COM US Commercial
EDU US Educational
GOV US Government
INT International
MIL US Military
NET Network
ORG Non-Profit Organization
ARPA Arpanet
NATO Nato field

bitti, (b) (bit) 0 tai 1
tavu, (B) (byte) 8 bittiä
sana, (word) 8 - 64 bittiä
longword 32 - 64 bittiä
kilotavu, (kB) (kiloByte) 1024 tavua
megatavu, (MB) (MegaByte) 1024 kB = 1024*1024 tavua
gigatavu, (GB) (GigaByte) 1024 MB = 1024*1024*1024 tavua
teratavu, (TB) (TeraByte) 1024 GB = 1024*1024*1024*1024 tavua

SI-järjestelmän kerrannaisyksiköiden etuliitteet

jotta, Y 10^24 = 1 000 000 000 000 000 000 000 000
tsetta, Z 10^21 = 1 000 000 000 000 000 000 000
eksa, E 10^18 = 1 000 000 000 000 000 000
peta, P 10^15 = 1 000 000 000 000 000
tera, T 10^12 = 1 000 000 000 000
giga, G 10^9 = 1 000 000 000
mega, M 10^6 = 1 000 000
kilo, k 10^3 = 1 000
hehto, h 10^2 = 1 00
deka, da 10^1 = 10
desi, d 10^(-1) = 0,1
sentti, c 10^(-2) = 0,01
milli, m 10^(-3) = 0,001
mikro, (pieni kreik. myy) 10^(-6) = 0,000 001
nano, n 10^(-9) = 0,000 000 001
piko, p 10^(-12) = 0,000 000 000 001
femto, f 10^(-15) = 0,000 000 000 000 001
atto, a 10^(-18) = 0,000 000 000 000 000 001
tsepto, z 10^(-21) = 0,000 000 000 000 000 000 001
jokto, y 10^(-24) = 0,000 000 000 000 000 000 000 001