C - Return to Index

CA - Refers to a Certificate Authority.

Cache - Refers to a storage area which holds data in order to expedite data retrievals and usage. For example, a computer may cache BIOS instructions in faster performing RAM after extracting them from ROM code.

CADU - Refers to a Channel Access Data Unit.

Canonical - Is to abide by the rules. In computer science and mathamatics this often refers to the way a formula or algorithm is written. When written in a standard way a function is said to be of canonical order.

Carrier Sense Multiple Access with Collision Detection - Refers to an access technique for LANS where workstations connected to the same channel can detect transmissions on that channel and que their transmission while the channel is in use.

Cassini, Giovanni Domenico - See Giovanni Domenico Cassini.

CASE - Refers to Computer Aided Software Engineering.

CCITT - Refers to the Consultative Committee for International Telephony and Telegraphy or to the Comite Consultatif International de Telegraphique et Telephonique. See ITU-TSS.

CCSDS - Refers to the Consultative Committee for Space Data Systems.

CDAS - Refers to a Command and Data Acquisition Station.

CSMA/CD - Is Carrier Sense Multiple Access with Collision Detection.

CDR - Refers to a CD-Recorder or CD-Recordable.

CD-Recordable - Refers to a blank compact disk.

CD ROM or CD-ROM - Refers to Compact Disk - Read Only Memory which uses optical technology.

CDMA - Refers to Code Division Multiple Access.

CERT - Refers to the Computer Emergency Response Team.

CGA - Refers to a Color Graphics Adapter.

cgi or CGI - Refers to Common Gateway Interface.

Child - Is or refers to a process, frame, class or window that has been spawned by a parent window, frame, class or process.

Children - See Child.

CI - Refers to a Confidence Interval.

CIC - Refers to a CPU Interupt Code.

CIO - is a Chief Information Officer.

CIR - Refers to Committed Information Rate.

Circular Polarization - Is a method of radio energy emission where the electric and magnetic field vectors rotate about the central axis of radiation. See Left Hand Circular Polarization and Right Hand Circular Polarization.

CIU - Refers to a Controls Interface Unit.

Class - A definition of an Abstract Data Type in C++.

CLSID - Refers to Class Indentifier.

CLT - Refers to Central Limits Theorm.

CLTU - Refers to a Command Link Transmission Unit.

Cluster or Clusters - Is when several servers are interconnected to balance a load on a network. Processes a delegated to CPUs on spearate servers and they work together as one larger system.

CMOS - Is a Complementary Metal Oxide Semiconductor.

CMS - Refers to Cable Management System.

CMTS - Refers to Cable Modem Termination System.

CNF - Refers to Clausal Normal Form.

CNF may also refer to the Conjunctive Normal Form.

COAMS - Refers to Customer Owned and Maintained Systems.

COBOL - Is the Common Business Oriented Language.

codec or CODEC - Refers to Compression/Decompression software or functions.

COM - Refers to The Component Object Model.

Comite Consultatif International de Telegraphique et Telephonique - See International Telecommunications Union - Telecommunications Standards Sector.

complete binary tree - Refers to a decision tree where all branches, with the exception of the bottom, are completely filled with nodes.

Computer Aided Software Engineering - Refers to automated programming tools. These tools often use an object orientated visual development enviroment.

config.sys or CONFIG.SYS File - Is executed before commands in the autoexec.bat file are when a computer operating MS-DOS is booted. It should be noted that this file is not essential to start MS-DOS but serves as a simplifying text of commands which load features such as device drivers.

Conjuncation - Is to be joined. Conjunction refers to a logical AND. Conjunction contrasts with disjunction.

Constructor - Is a function that instanciates a class.

Contention Access - See Carrier Sense Multiple Access with Collision Detection.

Conventional Memory - Refers to the fist 640 KB of RAM, particularly within the context of MS-DOS programs. There are programs which can modify this standard.

Cookie or Cookies - Is a file or an object that contains information about a user's or client's preferences, identification or other information. Cookies can be used simply to store information about portfolios or shopping items. Cookies can also store information about where, how often, when, and other aspects of a client's movements within a site or across the web. Cookies can be accessed by a server.

CORBA - Refers to the Common Object Request Broker Architecture a OOP standard developed by the Object Management Group.

CPU or CPUs - Refer to a single or multiple Central Processing Units.

crash recovery - Refers to methods of restoring data after a system has halted. When applied to FTP crash recovery refers to resume functionality.

CRC - Is a Cyclic Redundancy Check.

CSA - Refers to a Celestial Sensor Assembly.

CTO - is a Chief Technology Officer.

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