The
Start
How does they
work
How they are made
They future
History
The
diference between CD & DVD
What is aCD ROM
CD
ROM introduction
Index
CD ROM is compact disc read-only memory.
Compact disc were originally developed as a more durable, digital alternative
to prerecorded phonograph records and cassette tapes used for audio playback.
Read- only memory is a generic term for a permanent, unmodifiable computer
data storage device.
CD ROM disc are circular, 129-mm diameter
objects made from bulletproof polycarbonate, with a shiny underlayer that
stores digital information. Only one side of the is used for data storage.
A CD ROM disc can store up to660 mbytes of information. This is about 260,000
pages of text, or 74 minutes of music or video.
Another way of looking at these mind-numbing statistics is to compare CD ROM to its ubiquitous relative, the floppy disc. Squeezing 660,000 mbytes onto a single floppy disk using the 9 tracks per inch format of a standard MS DOS 360K diskette would require a diskette approximately 800 ft across.
Building applications that harness the power of CD ROM technology, yet are easy to use, is a significant challenge for developers and publishers. To meet the challenge, developers must have a through, intimate understanding of CD ROM technology.