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Optical disks

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Optical disks The Compact Disc
or CD for short, is an optical disc used to store digital data. It was originally developed to store and play back sound recordings only, but the format was later adapted for storage of data (CD-ROM), write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Discs (VCD), Super Video Compact Discs (SVCD), Photo CD, Picture CD, CD-i, and Enhanced CD. Audio CD's and audio players have been commercially available since October 1982. Have a storage capacity of 700MB or 80 minutes of continuous play.