10 Facts About CD-ROM

CD-ROM is a pre-pressed optical compact disc that contains data.

The CD-ROM was later designed an extension of the CD-DA, and adapted this format to hold any form of digital data, with an initial storage capacity of 553 MB.

The CD-ROM was announced in 1984 and introduced by Denon and Sony at the first Japanese COMDEX computer show in 1985.

Some computers which were marketed in the 1990s were called "multimedia" computers because they incorporated a CD-ROM drive, which allowed for the delivery of several hundred megabytes of video, picture, and audio data.

CD-ROM XA defines two new sector layouts, called Mode 2 Form 1 and Mode 2 Form 2 .

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CD-ROM capacities are normally expressed with binary prefixes, subtracting the space used for error correction data.

The capacity of a CD-ROM depends on how close the outward data track is extended to the disc's outer rim.

CD-ROM drives are rated with a speed factor relative to music CDs.

For example, a CD-ROM drive that can read at 8× speed spins the disc at 1600 to 4000 rpm, giving a linear velocity of 9.

Problems with vibration, owing to limits on achievable symmetry and strength in mass-produced media, mean that CD-ROM drive speeds have not massively increased since the late 1990s.