channelingAn application of push technology that allows users to automatically receive specific kinds of content. [Bahorsky]
ChannelizationThe modification of a natural river channel; may include deepening, widening, or straightening.
Channels, Channel listingsLists of links to selected (and usually popular) web sites. The links are maintained by search engines and directories and are sorted into categories or…
CharA byproduct of low-temperature carbonization of a solid fuel.
character checkA method of error detection using the preset rules for the formulation of characters.
character classA square-bracketed list of characters used in a "regular expression" to indicate that any character of the set may occur at a given point.
character filterSoftware that is capable of selectively removing characters from a data stream, e.g.
character generatorA functional unit that converts the coded representation of a character into the graphic representation of the character for display.
character integrityPreservation of a character during processing, storage, and transmission.
character intervalIn a communications system, the total number of unit intervals required to transmit any given character, including synchronizing, information, error…
character normalizationA process in which the variant forms of a character, such as capitalization and diacritical marks, are reduced to a common form.
character propertyA predefined "character class" matchable by the \p "metasymbol". Many standard properties are defined for "Unicode".
character setA grouping of alphabetic, numeric, and other characters that have some relationship in common.
character set encodingThe set of values assigned to characters in a character set. Related characters are often grouped with consecutive values, such as the alphabetic…
character-count integrityThe preservation of the exact number of characters that are originated in a message in the case of message communications, or per unit time, in the case…
character-steppedPertaining to control of start-stop teletypewriter equipment in which a device is stepped one character at a time.
characteristic distortionIn telegraphy, the distortion caused by transients that, as a result of previous modulation, are present in the transmission channel.
characteristic frequencyA frequency which can be easily identified and measured in a given emission. A carrier frequency may, for example, be designated as the characteristic…
characteristic impedance (Zo)The impedance of a circuit that, when connected to the output terminals of a uniform transmission line of arbitrary length, causes the line to appear…
CharacterizationDescription of the essential properties of an organism or system.
chargeable resourcesFeatures or services whose use incurs fees. Although some AWS products are free, others include charges.
charging reference locationIn Universal Personal Telecommunications Service, the geographical location that may be used by the UPT service providers to determine the…
ChassisThe shell of the race car itself including the floorboard, interior and roll cage. The chassis is loosely based off of standard manufactured cars.
ChatSee Instant messaging (IM). A form of real-time communication between two or more people based on typed text.
chat roomAn Internet relay chat (IRC) channel designated for the real-time exchange of text messages.
chat scriptA batch of commands and responses, prerecorded on a terminal computer, for the purpose of facilitating easy or automatic access to a network.
CheckA written order instructing a financial institution to pay immediately on demand a specified amount of money from the check writer's account to the person…
check bitA bit, such as a parity bit, derived from and appended to a bit string for later use in error detection and possibly error correction. 2.
check characterA character, derived from and appended to a data item, for later use in error detection and possibly error correction.
Check DigitOne digit, usually the last, of an identifying field is a mathematical function of all of the other digits in the field.
check inAdd or return a document to an enhanced folder. Releases the editing reservation on a document, allowing others to open and edit it.
check loopA device that is attached to interconnect the Go and Return paths of a circuit at the incoming end of a circuit on command to permit maintenance personnel…
check sequence (CS)A 16-bit sequence in the last two octets of a frame (excluding flags) that offers a cyclic redundancy check (CRC).
check wordCipher text generated by cryptographic logic to detect failures in cryptography. [INFOSEC-99]
check-in formIn the user interface, a form appearing when a user checks in a document. It contains check-in comments, an option to publish a document, and a drop-down…
Check-outCreate a writable version of a document while preventing other users from editing the same document. See also: check-in, enhanced folder
checkboxAn element in a Web page's interactive form that allows users to select an option associated with that element.
checked exceptionAn exception that must be caught locally in a try statement, or propagated via a throws clause defined in the method header. See unchecked exception.
checkinCheckin is the act of returning ArcStorm data which was previously checked out for update purposes.
checking codeMachine instructions used in the detection or interpretation of certain data or data fields from a diskette, for the purpose of determining whether the…
checkoutCheckout is the act of taking selected data out of an ArcStorm database into a local coverage for editing purposes.
CheckpointEvent or point in time during the program before which decision criteria must be met.
checksumA computed value that depends on the contents of a file. It is stored with data to detect file corruption.
checkvalueIn cryptography, a computed value that results from passing a data value through an irreversible algorithm. [After X9.24]
Chemical AgentA chemical substance which is intended for use in military operations to kill, seriously injure, or incapacitate personnel through its physiological…
Chemical LaserA laser in which chemical action is used to produce the laser energy.
Cheyenne Mountain Air Force Base (CMAFB)CMAFB provides the primary facilities for the command, operations, and processing centers which support the correlation and assessment functions of the…
Chief Information Officer (CIO)Agency official responsible for: 1) Providing advice and other assistance to the head of the executive agency and other senior management personnel of the…
child documentA document that inherits values from another document (the parent document).
Child ObjectAn object that resides in another object. A child object implies relation. For example, a file is a child object that resides in a folder, which is the…
chip rateThe rate of encoding. [NTIA] 2. In direct-sequence-modulation spread-spectrum systems, the rate at which the information signal bits are transmitted as a…
chip timeIn spread-spectrum systems, the duration of a chip produced by a frequency-hopping signal generator.
CHIPSWoody material cut into short, thin wafers. Chips are used as a raw material for pulping and fiberboard or as biomass fuel.
chirpingThe rapid changing, as opposed to long-term drifting, of the frequency of an electromagnetic wave.
CHOP(1) Countermeasures Hands-On Program. Also known as the MDA Countermeasures Skunkworks . (2) Change of Operational Control.
chosen-plaintext attackIn cryptography, an analytical attack in which a cryptanalyst can submit an unlimited number of plaintext messages and examine the corresponding…
chroma keyingIn television, nearly instantaneous switching between multiple video signals, based on the state, i.e.
chroma noiseNoise that manifests itself in a video picture as colored snow. [After Silicon]
chromatic dispersionA commonly used (but redundant) synonym for material dispersion. See dispersion.
chromaticity diagramA two-dimensional Cartesian plot that depicts the multidimensional subjective relationship among colors perceived by the normal human visual system (eyes…
chrominanceThe difference between a color and a specified reference color having a specified chromaticity and an equal luminance. [After Laurin]
chrominance signalIn color television, that signal or portion of the composite signal that bears the color information.
Chronic TrunkTrunk: A trunk experiencing a much higher then normal rate of failure or switching irregularities, over a period of time, with resulting high incidence of…
chronological fileRecords filed in date sequence Also referred to as CHRON and chron file.
cHTML (Compact HTML)Compact HTML (cHTML) is a subset of HTML which is designed for small devices. The major features of HTML that are excluded from cHTML are: JPEG image…
CICirrus clouds- High-level clouds (16,000 feet or higher), composed of ice crystals and appearing in the form of white, delicate filaments or white or…
CI (n)Capability Increment (Number), e.g., CI-2, (NMD BMC3 term).
CIDR (Classless Interdomain Routing)An IP address and routing management method that allocates IP addresses in a way that reduces the number of routes stored on any individual router, while…
CIDS(1) Control, Instrumentation and Diagnostic Systems (2) Critical Item Development Specification.
CIDSEConsolidated Integrated Development support Environment.
CIEAbbreviation for Commission International de l'Eclairage (International Commission on Illumination).
CIELCertification and INFOSEC Engineering Laboratory.