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compact disc
Last modified: Wednesday, August 13, 2003
Known by its abbreviation, CD, a compact disc is a polycarbonate with one or more metal layers capable of storingdigital information. The most prevalent types of compact discs are those used by the music industry to store digital recordings and CD-ROMs used to store computerdata. Both of these types of compact disc are read-only, which means that once the data has been recorded onto them, they can only be read, or played.
