Select the first letter of the word from the list above to jump to appropriate section of the glossary or type the term on which you want to search.

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Cat 6

cable is defined by the ANSI TIA/EIA 568B-2.1. It is suitable for 1000 Base-T Ethernet up to 100 m

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catalog

a somewhat dated term for the contents of a disk. see directory.

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Category 5 cable

commonly known as Cat 5, is an unshielded twisted pair type cable designed for high signal integrity. The actual standard defines specific electrical properties of the wire, but it is most commonly known as being rated for its Ethernet capability of 100 Mbit/s. Its specific standard designation is EIA/TIA-568. Cat 5 cable typically has three twists per inch of each twisted pair of 24 gauge copper wires within the cable. Another important characteristic is that the wires are insulated with a plastic (FEP) that has low dispersion, that is, the dielectric constant of the plastic does not depend greatly on frequency. Special attention also has to be paid to minimizing impedance mismatches at connection points.

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CAV

(Constant Angular Velocity) a constant disk rotation speed whether data is being accessed from the outer edge of the disk or nearer the center.

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Cc

abbreviation for carbon copy. The double letters refer to copies. When used in an email header, Cc indicates that copies of the message are being sent to more than one address. see Bcc.

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CCD

(Charge-coupled Device) devices used for the electronic recording of images. CCDs are used in digital cameras and scanners.

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CD

(Compact Disc) a plastic disc with a metal finish, developed in the 1980s, capable of storing digitized music. A CD stores data on a continuous groove, much like a phonograph record. One CD can store up to 74 minutes of music. see CD-I, CD-ROM, CD-RW.

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CD writer

a device that allows a user to record (burn) data using a CD-RW. A CDRW drive allows for the backup of music CDs as well as software applications, photos and individual files.

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CD-I

(Compact Disc Interactive) a compact disc that stores and makes available audio, video and binary data. Developed as a joint venture of Phillips and Sony, the CD-I standard has not been widely accepted.

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CDMA

(Code Division Multiple Access) a method for transmitting simultaneous signals over a shared portion of the spectrum. The foremost application of CDMA is the digital cellular phone technology from QUALCOMM that operates in the 800MHz band and 1.9GHz PCS band. CDMA phones are noted for their call quality.