C...

• C C Programming Language
• .C C source code (file name extension) [C]
• CA Certification Authority + Collision Avoidance
• CAB Compressed Application Binary [Microsoft]
• .CAB Cabinet (file name extension) [Microsoft]
• CACLS Command-Line Access Control Lists [Microsoft]
• CAD Computer Aided Design
• CADD Computer Aided Design and Drafting
• CADE Client/server Application Development Environment
• CAE Client Application Enabler + Common Applications
• Environment + Computer Aided Engineering
• CAEN Chemically Assembled Electronic Nanocomputer
• CAEX Computer Aided Exploration
• CAG Column Address Generator
• CAI Computer Aided Instruction
• CAIRN Collaborative Advanced Interagency Research Network
• CAL Calendar + Client Access License + Computer Aided Learning
• CALS Computer-Aided Acquisition in Logistic Support
• CAM Common Access Method + Computer Aided Manufacturing + Contents Addressable Memory
• CAN Cancel + Controller Area Network
• CANBUS Conroller Area Network Bus
• CAP Carrierless Amplitude and Phase-Modulation + Central Arbitration Point + Communication Application Platform + Competitive Access Provider + Computer Aided Publishing
• .CAP Capture (file name extension)
• CAPD Computing To Assist Persons With Disabilities [Johns
• Hopkins University]
• CAPE Concurrent Art-to-Product Environment
• CAPS Capitals (Upper Case Letters) + Cassette Programming System
• CAR Committed Access Rate [Cisco]
• CARL Colorado Alliance of Research Libraries [Internet]
• CART Computer-Assisted Radar Tomography
• CAS Column Address Select/Strobe + Communications Application Specification + Computer Aided Styling
• CASE Computer Aided Software Engineering
• CASL Crosstalk Application Scripting Language [DCA]
• CASS Computer Assisted Search Service
• CASSIS Classified and Search Support Information System
• CAT Computer Adaptive Test + Computer Aided Testing + Computer Aided Tomography + Computer Aided Transcription + Concatenate
• .CAT Catalog (file name extension)
• CATS Computer Assisted Training System
• CAT SCAN Computerized Axial Tomography Scan
• CATV Community Antenna Television (this was the original
• name for what is now known as Cable TV)
• CAU Controlled Access Unit
• CAV Constant Angular Velocity
• CAVE Computer Automatic Virtual Environment
• CBC Cipher Block Chaining
• CBCR Channel Byte Count Register
• CBDS Connectionless Broadband Data Service
• CBEMA Computer and Business Equipment
• Manufacturers Association
• CBGA Ceramic Ball Grid Array
• CBI Computer Based Instruction\Instrumentation
• CBL Computer Based Learning
• .CBL COBOL source code (file name extension)
• CBMS Computer-Based Mail System
• CBR Case Based Reasoning + Constant Bit Rate
• CBT Computer Based Training
• CBW Convert Byte to Word
• CBX Computer-Controlled Branch Exchange
• CC Cluster Controller
• CC: Carbon Copy
• CCD Charged-Coupled Device
• CCFT Cold Cathode Fluorescent Tube
• CCI Common Client Interface
• CCIE Cisco Certified Internetwork Expert [Cisco]
• CCITT Comite Consultatif International Telegraphique et
• Telephonique/ Consultative Committee for International
• Telegraph and Telephone
• CCL Connection/Cursor Control Language
• CCM Corba Component Mode
• CCNA Cisco Certified Network Associate
• CCNP Cisco Certified Network Professional
• CCP Certified Computing Professional + Console Command Processor
• CCS Common Command Set + Common Communications Services + Common Communications Support + Continuous Composite Servo + Cryptographic Checksum
• .CCS Color Calibration System (file name extension)
• CCSD Cellular Circuit-Switched Data
• CCTLD Country Code Top-Level Domain
• CD Carrier Detect + Change Directory + Collision Detection + Color Display + Compact Disk
• C/D Control Data
• C2D Character To Decimal [REXX]
• CDA Compound Document Architecture [DEC]
• .CDA CD Audio Track (file name extension)
• CDBT Compact Disk-Based Training
• CDC Connected Device Configuration + Control Data Corporation
• CD_CHRDY Card Channel Ready [IBM]
• CD-DA Compact Disk -Digital Audio
• CDDI Copper Distributed Data Interface
• CDE Common Desktop Environment + Complex Data Entry
• CD-E Compact Disk - Erasable
• CDF Channel Definition Format
• .CDF Comma Delimited Format (file name extension)
• CDFS Compact Disc File System [Microsoft]
• CD+G Compact Disk plus Graphics
• CD-I Compact Disk - Interactive
• CDIA Certified Document Imaging Architect
• CDL Computer Design Language
• CDMA Code Division Multiple Access
• CDMF Commercial Data Masking Facility [IBM]
• CD-MO Compact Disk - Magneto Optical
• CDO Collaboration Data Objects [Microsoft]
• CDOS Concurrent Disk Operating System
• CDP * Certificate In Data Processing (First certification
• for Computer Professionals)
• CDPD Cellular Digital Packet Data
• CDR Call Detail Record + Call Detail Recording + Common Data Representation
• .CDR CorelDRAW (file name extension) [Corel]
• CD-R Compact Disk - Recordable
• CD-RAM Cached RAM
• CD-RDx Compact Disk - Read Only Memory Data Exchange Standard
• CDRL Contract Data Requirements List
• CD-ROM Compact Disk - Read Only Memory
• CD-RTOS Compact Disk - Real Time Operating System
• CD-RW Compact Disk - Rewritable
• CDS Current Directory Structure
• CDSA Common Data Security Architecture
• CDSL (See DSL)
• .CDT Corel Draw Template (file name extension)
• CD-V Compact Disk - Video
• CD-WO Compact Disk - Write Once
• .CDX Compound Index (file name extension) [Fox Pro]
• CD-XA Compact Disk - Extended Architecture
• CE Cache Enable + Chip Enable + Collision Elimination + Convert Enable
• CEC Certified E-Commerce Consultant
• CEG Continuous Edge Graphics
• CEI Conducted Electromagnetic Interference
• CELP Card Edge Low Profile (socket) [Intel]
• CEMS Constituent Electronic Mail System
• CEOP Conditional End Of Page
• CER Canonical Encoding Rules
• CERN The European Particle Physics Laboratory (initials
• originally from Conseil Europien pour la Recherche
• Nucliaire)
• CERT Computer Emergency Response Team
• CFB Cipher Feedback + Configurable Function Block
• .CFG Configuration (file name extension)
• CFM Code Fragment Manager [Macintosh] + Cubic Feet Per Minute
• CFML ColdFusion Markup Language
• CFR Computerized Facial Recognition
• CFS Caching/Common File System
• CFV Call For Votes [Bitnet]
• CG Control Gate
• CGA Color Graphics Adapter
• CGE Common Graphics Environment
• CGI Computer Generated Images + Computer Graphics Interface
• CGI-BIN Common Gateway Interface - Binary
• .CGM Computer Graphics Metafile (file name extension) + Graph (file name extension) [Lotus 1-2-3] [LDC]
• CGS Continuous-Grain Silicon
• CHAP Challenge-Handshake Authentication Protocol
• CHAR Character
• CHAT Conversational Hypertext Access Technology [Internet]
• CHCK Channel Check
• CHCP Change Code Page
• CHDIR Change Directory
• CHFN Change Finger [Unix]
• CHGRP Change Group
• CHIPS Clearinghouse Interbank Payments System
• .CHK CHKDSK (file name extension)
• CHKDSK Check Disk
• CHMOD Change Mode
• CHOWN Change Owner
• CHP Chapter
• CHR Character
• CHRP Common Hardware Reference Platform
• CHS Cylinder Head Sector
• CHTML Compressed HTML
• CI Component Interface
• CIA Current Instruction Address
• CIAC Computer Incident Advisory Capability
• CICS/VS Customer Information Control System/
• Virtual Storage [IBM]
• CID Charge-Injection Device + Configuration/Installation/Distribution
• CIDR Classless Inter-Domain Routing
• CIF Common Interchange/Intermediate Format + Crystallographic Information File + Customer Information Feed
• CIFS Common Internet File System
• CIL Common Intermediate Language [ECMA]
• CIM Common Information Model + CompuServe Information Manager + Computer Integrated Manufacturing
• CIO Chief Information Officer
• CIOCS Communication Input/Output Control System
• CIP Command Interface Port + Common Indexing Protocol
• CIR Committed Information Rate
• CIRC Circular Reference + Cross-Interleaved Reed-Solomon Code
• CIS Card Information Structure + Client Information System + CompuServe Information Service + Computer Information Systems + Contact Image Sensor + Customer Information System
• CISC Complex Instruction Set Computing
• CIT Computer-Integrated Telephony
• CIVR Computer and Interactive Voice Response
• CIW Certified Internet Webmaster
• CIX Commercial Internet Exchange + Compulink Information Exchange
• CJLI Command Job Language Interpreter
• CKD Count Key Data (device)
• CLAR Channel Local Address Register
• CLASS Client Access to Systems and Services + Cooperative Library Agency for Systems and Services + Custom Local-Area Signaling Services
• CLC Clear Carry Flag
• CLD Clear Direction Flag
• CLDC Connected Limited Device Configuration
• CLEC Competitive Local Exchange Carrier
• CLI Call-Level Interface + Clear Interrupt Flag + Client Library Interface + Command Line Interface + Common Language Infrastructure/Interface
• CLIB C Library
• CLID Calling Line Identification
• CLIST Command List
• CLK Clock
• CLNP Connectionless Network Protocol
• CLOS Common Lisp Object System
• CLP Cell Loss Priority + Constraint Logic Programming
• .CLP Clipboard (file name extension) [Microsoft]
• CLR Common Language Runtime [Microsoft]
• CLS Clear Screen + Common Language Support
• CLSID Class Identifier
• CLTP Connectionless Transport Protocol
• CLTS Clear Task Switch Flag
• CLTV Constant Linear Time Velocity
• CLUI Command Line User Interface
• CLUT Color Look-Up Table
• CLV Constant Linear Velocity
• CM Centimeter + Control Mark + Corrective Maintenance
• CMA Concert Multi-thread Architecture
• CMC Common Mail Calls + Common Messaging Calls + Communication Management Configuration + Complement Carry Flag + Computer-Mediated Communication [Internet]
• CMD Circuit Mode Data
• .CMD Command (file name extension)
• CMF Creative Music Format
• CNIDR Clearinghouse for Network Information and
• Discovery and Retrieval [Internet]
• CMIP Common Management Information Protocol
• CMIS Common Management Information Services/System
• CML Chemical Markup Language + Conceptual Modelling Language + Computer Managed Learning + Current Mode Logic
• CMM Capability Maturity Model
• CMMS Computerized Maintenance Management Software
• CMMU Cache/Memory Management Unit [Motorola]
• CMOS Coats-Mellon Operational Specification + Complementary Metal-Oxide Semiconductor
• CMOV Conditional Move
• CMP Compare + Computer
• CMPS Compare Word String
• CMS Call Management Server + Code Management System + Compiler Monitor System + Conversation Monitor System
• CMTS Cable Modem Termination System
• CMVC Configuration Management Version Control [IBM]
• CMW Compartmented Mode Workstation
• CMY Cyan-Magenta-Yellow (color model)
• CMYK Cyan-Magenta-Yellow-Black (color model)
• CNA Certified NetWare/Network Administrator
• CNAPS Co-Processing Node Architecture for Parallel Systems
• CNC Computerized Numerical Control
• CNE Certified NetWare Engineer
• .CNF Configuration (file name extension)
• CNG Calling (tone)
• CNI Certified Novell Instructor [Novell]
• CNIDR Clearinghouse for Networked Information and
• Discovery and Retrieval [Internet]
• CNN Composite Network Node
• CNR Carrier to Noise Ratio + Communication Network Riser
• CNSS Core Nodal Switching Subsystem [Internet]
• .CNT Contents (file name extension)
• CNV Conventional (pertaining to Memory)
• CNVT Convert
• CNX Certified Network Expert
• CO Central Office + Command Output + Convert Out
• COAST Card On A Stick (module)
• COAX Coaxial Cable
• COB Chip-On-Board
• .COB COBOL source code (file name extension)
• COBOL Common Business-oriented Language (See HLL)
• .COD Code List (file name extension)
• CODASYL * Conference on Data System Languages (Group that
• designed COBOL)
• CODE Client-Server Open Development Environment
• CODEC Coder/Decoder + Compression/Decompression
• COEM Commercial Original Equipment Manufacturer
• COFF Common Object File Format [Unix]
• COGO Coordinate Geometry (Programming Language)
• COL Collision + Computer Oriented Language
• COLD Computer Output to Laser Disk
• COLL Collision
• COM Component Object Model [Microsoft] + Computer Output Microfilm
• .COM Command (file name extension) + Commercial Business (Domain Name) [Internet]
• COM1 First serial Port (asynchronous port)
• COM2 Second serial Port
• COM3 Third serial Port
• COM4 Fourth serial Port
• COMDEX Computer Dealers Exposition
• COMET Cornell Macintosh Terminal Emulator
• COMM Communications
• COMP Compare
• COMP. Computers [USENET Newsgroup Category]
• COMSAT Communications Satellite Corporation
• CON Console (includes Keyboard and Screen)
• COND Condition
• CONFIG Configuration
• CONS Connection-Oriented Network Service
• CONTONE Continuous Tone
• .COOP Cooperatives-Business (Domain Name) [Internet]
• COPICS Communications Oriented Production Information
• and Control System [IBM]
• COR Common Object Runtime
• CORBA Common Object Request Broker Architecture
• COREN Corporation for Research and Enterprise Network
• COS Compatible Operating System
• COSE Combined Office Standard Environment + Common Open Software/Systems Environment
• COSMIC Computer Software Management and Information
• Center [NASA]
• COSMOS Computer System for Mainframe Operations
• COSS Common Object Services Specification
• COTS Commercial Off-The-Shelf (software)
• CP Copy Protected
• CPA Certified Public Accountant + Cost Per Action
• CPAN Comprehensive Perl Archive Network
• CPC Constant Point Calculation + Cost Per Click
• CPCS Check Processing Control System [IBM]
• CPE Central Processing Element + Customer Premises Equipment + Customer Provided Equipment
• .CPE Cover Page (file name extension)
• CPFR Collaborative Planning, Forecasting and Replenishment
• CPG Clock Pulse Generator
• CPI Characters Per Inch + Clock Per Instruction + Common Programming Interface [IBM]
• .CPI Code Page Information (file name extension) [MS-DOS]
• CPI-C Common Programming Interface for Communications [IBM]
• CPIO Copy In and Out [Unix]
• CPL Current Privilege Level
• .CPL Control Panel (file name extension)
• CPLD Complex Programmable Logic Device
• CPM Critical Path Method
• CP/M Control Program for Microcomputers [Digital Research]
• CPO Chief Privacy Officer
• CPRM Content Protection for Recordable Media
• CPS Characters Per Second + Cycles Per Second
• CPT Command Pass Through
• CPU Central Processing Unit
• CPW Commercial Processing Workload [IBM]
• CR Carriage Return
• CRAM Challenge-Response Authentication Mechanism + Cyberspatial Reality Advancement Movement
• CRAYON Create Your Own Newspaper
• CRC Cyclic Redundancy Check
• .CRD Cardfile (file name extension) + Chord (music file name extension)
• CREN Computer Research Education Network + Corporation for Research and Education Networking
• CRF Cable Retransmission Facility + Cross Reference File
• CRI Color Reproduction Indices
• CRL Certificate Revocation List
• CR/LF Carriage Return/Line Feed
• CRM Customer Relationship Management
• CROM Control Read Only Memory
• CRT Cathode Ray Tube
• CRTC CRT Controller
• CRUD Create, Retrieve, Update, Delete
• CS Chip Select + Clear to Send + Code Segment
• C/S Client/Server
• CSA Calendaring and Scheduling API [IBM]
• CSAR Channel System Address Register
• CSCW Computer Supported Cooperative Work
• CSD Circuit-Switched Data + Computer Services Department + Corrective Service Diskette [IBM]
• CSDS Circuit Switched Data Service
• CSE Certified System Engineer
• CSFI Communication Subsystem For Interconnection
• CSG Constructive Solid Geometry + Consulting Services Group [Lotus]
• CSI Command Sequence Introducer + CompuServe Incorporated
• CSID Call Subscriber Identification
• CSL Computer Sensitive Language
• CSLIP Compressed Serial Line Interface Protocol [Internet]
• CSM Code Set Map (file) + Communications Services Manager + Control Strip Module [Macintosh]
• CSMA/CA Carrier Sense Multiple Access/with Collision Avoidance
• CSMA/CD Carrier Sense Multiple Access/with Collision Detection
• CSMS Customer Support Management System
• CSN Card-Select Number
• CSNET Computer Science Network
• CSO Central Services Organization
• CSP Certified Systems Professional + Chip-Scale Packaging + Commercial Service Provider + Commercial Subroutine Package + CompuCom Speed Protocol [CompuCom] + Communicating Sequential Processes + Cross System Product [IBM]
• CSPDN Circuit Switched Public Data Network
• CSRAM Custom Static RAM
• CSS * Continuous System Simulator (Language)
• CSS Cascading Style Sheet [Microsoft] + Contact Start-Stop + Content Scrambling System
• CSSM Client-Server Systems Management [IBM]
• CS/SS Card Service/Socket Service
• CSTA Computer-Supported Telephony Applications
• CSU Channel Service/Switching Unit
• CSV Circuit-Switched Voice + Comma-Separated Value/Variable + Common Services Verbs (interface) [Microsoft]
• C2T Cable Changing Technology
• C&T Chips and Technologies
• CTB Cipher Type Byte
• CTC Channel To Channel + Counter/Timer Chip
• CTCP Client-To-Client Protocol
• CTI Computer-Telephony Integration
• CTL Complex Text Layout
• CTOS Cassette Tape Operating System + Computerized Tomography Operating System + Convergent Technologies Operating System
• CTPA Coax-to-Twisted-Pair Adapter
• CTRCO * Calculating,Tabulating,Recording Company (The name of
• this company was changed to "International Business
• Machines" by Thomas J. Watson, Sr.)
• CTRL Control
• CTS Clear To Send + Computer Telephony Solution [IBM] + Customer Telephone System
• CTSS * Compatible Time Sharing System
• CUA Common User Access [IBM]
• CUB Cursor Backward
• CUD Cursor Down
• CUE Custom Updates and Extras (card) [Egghead Software]
• CUF Cursor Forward
• CUI Character-Oriented User Interface + Common User Interface [IBM]
• CUP Cursor Position
• CUPID Completely Universal Processor I/O Design [AST]
• .CUR Cursor (file name extension)
• CUSIP Committee for Uniform Security Identification
• Procedures [U.S. Treasury]
• CUT Control Unit Terminal
• CUTE Clarkston University Terminal Emulator
• CUU Cursor Up
• CVF Compressed Volume File
• CVGA Color Video Graphics Array
• CVIA Computer Virus Industry Association
• CVS Concurrent Versions System
• CVT Convert
• CVW CodeView for Windows
• CWA Competitive Web Analysis
• CWD Convert Word to Double Word + Change Working Directory [Internet]
• CWIS Campus Wide Information Service/System [Internet] + Community Wide Information Service/System [Internet]
• C2X Character To Hexadecimal [REXX]
• CXML Commerce Extensible Markup Language
• CYL Cylinder
• CYMK Cyan-Yellow-Magenta-Black (color model)