CCITTConsultative Committee for International Telephone & Telegraphy. Sets standards for phones, faxes, modems etc.
CCLConvective Condensation Level- The level in the atmosphere to which an air parcel, if heated from below, will rise dry adiabatically, without becoming…
CCL (Common Communication Layer)The communication infrastructure that unites the various components (controller, parser, crawler, indexer) of WebSphereî Information Integrator…
CCR (cluster continuous replication)A clustered Exchange deployment that combines the asynchronous log shipping and replay features in Exchange 2007 with the failover and management features…
CDa type of form designation such as Form CD435, meaning a Commerce Department form
CD (compact disk)An optical disk that can store up to 700 MB of data Note: It is available in read-only (CD-ROM), write-once (CD-R), and rewritable (CD-RW) technologies.
CD ROM XAAbbreviation for compact disc read only memory eXtended architecture. An extension of the CD-ROM standard, billed as a hybrid of CD ROM and CD-IS formats.
CD-iAbbreviation for compact disc-interactive. A compact disc format that provides audio, digital data, still graphics, and limited motion video, and that…
CD-ROMSee Compact Disc. (Compact Disk - Read Only Memory) Data storage medium that uses compact discs to store about 1,500 floppy discs worth of data.
CDACentral Design Activity (USAF term for Software Engineering Center).
CDATAA predefined XML tag for character data that means "don't interpret these characters," as opposed to parsed character data (PCDATA), in which the normal…
CDI(1) Conventional Defense Initiative. (2) Compressed Data Interface. (3) Classification, Discrimination, and Identification (PATRIOT).
CDIA+Vendor-neutral certification that validates a professional's level of expertise in the technologies and best practices used to plan, design, and specify a…
CDMA (Code-division multiple access access)a digital cellular technology that uses spread-spectrum techniques. Unlike competing systems, such as GSM, that use TDMA, CDMA does not assign a specific…
Cease EngagementIn air defense, a fire control order used to direct units to stop the firing sequence against a designated target.
Cease FireA command given to refrain from firing on, but to continue to track objects. Missiles already in flight will be permitted to continue to intercept.
CEIAbbreviation for comparably efficient interconnection.
CEIPA Microsoft program that invites customers to provide Microsoft with more detailed information about how the software is used including the type and…
CellThe fundamental level of structural organization in complex organisms. Eukaryotic cells contain a nucleus (with chromosome s) and cytoplasm with the…
cell delay variationA quantification of variability in cell delay for an asynchronous transfer mode (ATM) layer connection. [T1.630-1999]
cell delineationThe identification of the asynchronous transfer mode (ATM) cell boundaries within a cell stream. [T1.646-1995]
cell headerAsynchronous transfer mode (ATM) layer protocol control information that precedes user data. [After T1.627-1993]
cell loss ratio1. In a network, the ratio (1- x/y), where: y is the number of cells that arrive in an interval at the ingress of the network; and x is the number of…
cell relayA statistically multiplexed interface protocol for packet switched data communications that uses fixed-length packets, i.e., cells, to transport data.
cellularRefers to communications systems, especially the Advance Mobile Phone Service (AMPS), that divide a geographic region into sections, called cells.
cellular mobileA mobile communications system that uses a combination of radio transmission and conventional telephone switching to permit telephone communication to and…
cellular technologyIn telephony, a generic term for all wireless phones, regardless of the technology they use; the term derives from cellular base stations that receive and…
CEMCivil Emergency Message. A message issued by the National Weather Service in coordination with Federal, state or local government to warn the general…
CenterGenerally speaking, the vertical axis of a tropical cyclone, usually defined by the location of minimum wind or minimum pressure.
center frequencyIn frequency modulation, the rest frequency, i.e., the frequency of the unmodulated carrier. Synonym carrier frequency. 2.
central directory architectureDirectory architecture in a Domino domain in which some servers store Configuration Directories and use primary Domino Directories on remote servers for…
central filesfiles of one or more organizational units stored in one physical location to improve their management and control Also referred to as central registry.
central office (C.O.)A common carrier switching center in which trunks and/or loops are terminated and switched.
Central Office (CO) CodeThe sub-NPA code in a TN, i.e., digits D-E-F of a 10-digit NANP Area address. Central office codes are in the form "NXX," where N is a number from 2 to 9…
central office connecting facilityLoosely, in the sense of a trunk between public and private switches, a synonym for central office trunk. See trunk.
central office prefixThe first three digits (N) of the seven-digit telephone number assigned to a customer's telephone exchange service when dialed on a local basis.
central office trunkLoosely, in the sense of a trunk between public and private switches, a synonym for central office connecting facility. See trunk.
Central Processing UnitThe Central Processing Unit (CPU) is the heart of a computer as it is the part that contains the computer's ability to obey instructions.
centralized attendant services (CAS)A function of a usually centrally located attendant console that permits the control of multiple switches, some of which may be geographically remote.
centralized automatic message accounting (CAMA)An automatic message accounting system that serves more than one switch from a central location. Note: When using CAMA, human intervention may be required.
Centralized CommandOperational concept which specifies that critical C2 is collected and key C2 decisions are performed at a central location by USCINCSPACE, or his…
Centralized ControlThe control mode whereby a higher echelon makes direct target assignments to fire units. (USSPACECOM)
Centralized ManagementThe concept of using a single, designated management authority. It includes system management, program/project management, and product management.