Cd Sign Video
Upload On Wed Jun 13 2012 by ASL STEM
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Definition
an optical disk approximately 4 3 / 4 in. (12 cm) in diameter, on which a program, data, music, etc., is digitally encoded for a laser beam to scan, decode, and transmit to a playback system, computer monitor, or television set. Abbreviation: CD
Source: http://dictionary.reference.com/browse/compact+disk
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