Question

define compact disc
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Answer 1

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.

"all the recordings have been reissued on compact disc"

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Answer 2

Answer:

Compact disc is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982. The format was originally developed to store and play only sound recordings but was later adapted for storage of data.