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The Epic Interactive Encyclopedia 1996
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Epic Interactive Encyclopedia, The (1996)(Epic Marketing)[non-bootable].iso
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1992-09-02
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709b
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20 lines
A compact disc is a disc for storing digital
information, about 12cm (4╜inches) across,
mainly used for music, when it can have over
an hour's playing time. Entirely different
from a conventional LP, the compact disc is
made of aluminium with a transparent plastic
coating. The metal disc underneath is etched
by a laser beam with microscopic pits that
carry a digital code representing the sounds.
During playback, a laser beam reads the code
and produces signals that are changed into
near-exact replicas of the original sounds.
Compact discs were launched 1983.
Over the past decade development of the
compact disc has allowed home computers to
use them as a storage medium.
Subject by: Samantha Good