Compact Disc

A family of related optical storage media. The name for an injection-molded, metallized disc, 8 cm or 12 cm in diameter, which stores high-density digital data in microscopic pits that a laser beam can read. Invented by Philips and Sony, it was originally designed to store high-fidelity music. Because of its data storage capacity, the compact disc now is used as a delivery media for electronic publishing.

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