what is compact disk?
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Explanation:
a small plastic disc on which music or other digital information is stored in the form of a pattern of metal-coated pits from which it can be read using laser light reflected off the disc.
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The compact disc is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. It was released in 1982 branded as Digital Audio Compact Disc. The format was later adapted for storage of data.
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