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Compact
Disk
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A compact disk is a format of digital information storage,
which is mainly used for music, where it can have playing time exceeding an hour. A
compact disk is made of aluminum with a transparent plastic coating, the metal disk
underneath is etched by a laser beam that "carves" extremely small pits which
represent a digital code. Sound or other information can be encoded onto the disk. During
playback a laser beam reads the code and produces signals that are almost 100% true to
life. CD-ROM a variation on the CD is used to carry any sort of computer information, be
it video, text or graphics. Nowadays there are many variations of compact disks, including
CD-Audio, CD-Video, CD-Interactive, CD-ROM, CD-Recordable, CD-ReWriteable and the newly
introduced Digital Versatile (Video) Disk or DVD. Compact disks were first launched in
1983. |
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Copyright Team 16541 |
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