Technology terms starting with C

2,021 terms

chain server topology Connects servers one-to-one, end-to-end. Information travels along the chain and then back.
Chairmans Program Assessment (CPA) Summarizes the views of the Chairman, Joint Chiefs of Staff, on the balance and capabilities of the Program Objective Memorandum (POM) force and the…
challenge and reply authentication [A] prearranged procedure in which a subject requests authentication of another, and the latter establishes validity with a correct reply. [INFOSEC-99]
Challenge Response A method used to confirm the presence of a person by eliciting direct responses from the individual. Responses can be either voluntary or involuntary.
Challenge-Response Protocol An authentication protocol where the verifier sends the claimant a challenge (usually a random value or a nonce) that the claimant combines with a shared…
CHAMP Composite High Altitude Maneuvering PBV
change back The procedure of transferring signaling traffic from alternative signaling link(s) to the signaling link which has become available as a result of having…
change log The log where the quorum resource stores data. This data is maintained by the clustering software.
Change of Operational Control (CHOP) The date and time at which the responsibility for operational control of a force or unit passes from one operational control authority to another.
Change Order Unilateral written order to a contractor to modify a contractual requirement within the scope of the contract, pursuant to the changes clause contained in…
changeover The procedure of transferring signaling traffic from one signaling link to one or more different signaling links, when the link in use fails or is…
Channel The bed of a stream or river. This can also refer to a submerged stream or river channel in a reservoir.
channel bank The part of a carrier-multiplex terminal that performs the first step of modulation by multiplexing a group of channels into a higher bandwidth analog…
channel bits Binary data transmitted over a communications link. Note: Channel bits are derived from user information by FEC (forward error correction) coding and…
channel capacity 1. The maximum possible information transfer rate through a channel, subject to specified constraints. 2.
channel gate A device for connecting a channel to a highway, or a highway to a channel, at specified times.
channel noise level The ratio of the channel noise at any point in a transmission system to an arbitrary level chosen as a reference.
channel offset The constant frequency difference between a channel frequency and a reference frequency which may frequency hop.
channel packing Maximizing the use of voice frequency channels for data transmission by multiplexing a number of channels of lower data rate into a single voice frequency…
channel reliability (ChR) The percentage of time a channel was available for use in a specified period of scheduled availability.
channel service unit (CSU) A line bridging device that (a) is used to perform loop-back testing, (b) may perform bit stuffing, (c) may also provide a framing and formatting pattern…
channel supergroup See group.
channel time slot A time slot that starts at a particular instant in a frame and is allocated to a channel for transmitting data, such as a character or an in-slot signal.
channel-associated signaling Signaling in which the signals necessary to switch a given circuit are transmitted via the circuit itself or via a signaling channel permanently…
channeling An application of push technology that allows users to automatically receive specific kinds of content. [Bahorsky]
Channelization The modification of a natural river channel; may include deepening, widening, or straightening.
Channels, Channel listings Lists of links to selected (and usually popular) web sites. The links are maintained by search engines and directories and are sorted into categories or…
Char A byproduct of low-temperature carbonization of a solid fuel.
character See: trait.
character check A method of error detection using the preset rules for the formulation of characters.
character class A 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 filter Software that is capable of selectively removing characters from a data stream, e.g.
character generator A functional unit that converts the coded representation of a character into the graphic representation of the character for display.
character integrity Preservation of a character during processing, storage, and transmission.
character interval In a communications system, the total number of unit intervals required to transmit any given character, including synchronizing, information, error…
character normalization A process in which the variant forms of a character, such as capitalization and diacritical marks, are reduced to a common form.
character property A predefined "character class" matchable by the \p "metasymbol". Many standard properties are defined for "Unicode".
character recognition The identification of characters by automatic means.
character set A grouping of alphabetic, numeric, and other characters that have some relationship in common.
character set encoding The set of values assigned to characters in a character set. Related characters are often grouped with consecutive values, such as the alphabetic…
character-count integrity The 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-stepped Pertaining to control of start-stop teletypewriter equipment in which a device is stepped one character at a time.
characteristic distortion In telegraphy, the distortion caused by transients that, as a result of previous modulation, are present in the transmission channel.
characteristic frequency A 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…
Characterization Description of the essential properties of an organism or system.
characters per inch (cpi) In a recording medium, a unit of linear packing density of characters.
characters per second (cps) A unit of signaling speed used to express the number of characters passing a designated point per second.
charge coupled device (CCD) See CCD.
charge-back allocation of the costs of programs, functions, or services to the groups who use them
charge-out See check-out.
chargeable resources Features or services whose use incurs fees. Although some AWS products are free, others include charges.
charging reference location In Universal Personal Telecommunications Service, the geographical location that may be used by the UPT service providers to determine the…
CHARM Composite High Altitude Radiation Model.
Chassis The shell of the race car itself including the floorboard, interior and roll cage. The chassis is loosely based off of standard manufactured cars.
Chat See Instant messaging (IM). A form of real-time communication between two or more people based on typed text.
chat group In computer conferencing chat, synonym forum.
chat room An Internet relay chat (IRC) channel designated for the real-time exchange of text messages.
chat script A batch of commands and responses, prerecorded on a terminal computer, for the purpose of facilitating easy or automatic access to a network.
Check A 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 bit A 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 character A character, derived from and appended to a data item, for later use in error detection and possibly error correction.
Check Digit One digit, usually the last, of an identifying field is a mathematical function of all of the other digits in the field.
check in Add or return a document to an enhanced folder. Releases the editing reservation on a document, allowing others to open and edit it.
check loop A 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 word Cipher text generated by cryptographic logic to detect failures in cryptography. [INFOSEC-99]
check-in form In 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-out Create a writable version of a document while preventing other users from editing the same document. See also: check-in, enhanced folder
checkbox An element in a Web page's interactive form that allows users to select an option associated with that element.
checked exception An exception that must be caught locally in a try statement, or propagated via a throws clause defined in the method header. See unchecked exception.
checkin Checkin is the act of returning ArcStorm data which was previously checked out for update purposes.
checking code Machine instructions used in the detection or interpretation of certain data or data fields from a diskette, for the purpose of determining whether the…
checkout Checkout is the act of taking selected data out of an ArcStorm database into a local coverage for editing purposes.
Checkpoint Event or point in time during the program before which decision criteria must be met.
checksum A computed value that depends on the contents of a file. It is stored with data to detect file corruption.
checkvalue In cryptography, a computed value that results from passing a data value through an irreversible algorithm. [After X9.24]
Chemical Agent A chemical substance which is intended for use in military operations to kill, seriously injure, or incapacitate personnel through its physiological…
Chemical Laser A 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…
Chief Information Security Officer SEE Senior Agency Information Security Officer.
child document A document that inherits values from another document (the parent document).
Child Object An 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 See: micro-array.
chip rate The 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 time In spread-spectrum systems, the duration of a chip produced by a frequency-hopping signal generator.
CHIPS Woody material cut into short, thin wafers. Chips are used as a raw material for pulping and fiberboard or as biomass fuel.
chirping The 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 attack In cryptography, an analytical attack in which a cryptanalyst can submit an unlimited number of plaintext messages and examine the corresponding…
chroma keying In television, nearly instantaneous switching between multiple video signals, based on the state, i.e.
chroma noise Noise that manifests itself in a video picture as colored snow. [After Silicon]
chromatic dispersion A commonly used (but redundant) synonym for material dispersion. See dispersion.
chromaticity chart See chromaticity diagram.
chromaticity diagram A two-dimensional Cartesian plot that depicts the multidimensional subjective relationship among colors perceived by the normal human visual system (eyes…
chrominance The difference between a color and a specified reference color having a specified chromaticity and an equal luminance. [After Laurin]
chrominance signal In color television, that signal or portion of the composite signal that bears the color information.
CHRON See chronological file.
chron file See chronological file.