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Computer Glossary - C

CD-ROM
Compact disc read-only memory. A laser-encoded optical memory storage medium.

Cluster
A specified number of sectors grouped together by the FORMAT command. The number is determined by the size of the logical drive. A cluster is the smallest storage unit for storing files.

Codec
Compression/decompression technology for digital video and stereo audio.

Control Panel
Control Panel is a part of the Microsoft Windows graphical user interface which allows users to view and manipulate basic system settings and controls, such as adding hardware, adding and removing software, controlling user accounts, and changing accessibility options.

Cookie
A means by which, under the HTTP protocol, a server or a script can maintain state or status information on the client workstation. In other words, a cookie is bits of information about a person's visit to a Web page. A cookie can include such information as the way a Web page was customized or how a visitor shopped on a Web site, or it can be used to track repeat visits. Cookies are stored on the client computer.