Computer Aided Software Engineering. The automation of some of the methodologies used in software engineering.

Computer Aided Testing.

Computer Assisted Training System. One of the benefits of computer-assisted training is that each trainee can go at his or her own pace.

Community Antenna TeleVision, the original name for Cable TV.

Constant Angular Velocity. The writing or reading mode used with a hard disk, floppy disk, or laserdisc. The disk rotates at a constant speed, and the number of bits in each track is the same, but because the inner tracks are smaller in circumference than the outer tracks, their density is less. CAV wastes disk space this way compared with constant linear velocity (CLV), but makes data retrieval fast and is a good way to store high-resolution photos or video.

Computer Based Message System.

Constant Bit Rate. A constant rate of transmission, required for voice transmissions.

Computer-controlled Branch eXchange. A telephone switching system that connects telephone extensions to each other within a company or building. Also called PBX.

Carbon copy. Sending a copy of a letter or e-mail message to another person in addition to the addressee, and showing on the original letter the other(s) to whom a copy was sent.

Cold Cathode Fluorescent Tube.