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CD-ROMs: Serving Up More Than Music
D-ROM, or Compact Disc-Read Only Memory, drives work with optical CD-ROM disks that are capable of containing significant amounts of data. The most common amount that a CD-ROM can hold is 650 megabytes. Basically, that's the equivalent of over 500 high-density floppy disks. Quite a lot for a small, round, thin piece of metal.

CD-ROMs are "burned" by the person or company that puts the information on the disk. Burning means that the data can't be erased or altered. To read this data, you need a CD-ROM player. CD-ROM players are capable of playing music CDs as well as reading CD-ROMs. CD-ROMs are an excellent means of archiving and transporting graphic files and application installers.

All CD-ROM drives are not created equally. The faster the drive, the faster your computer will be able to access data on a CD-ROM. This becomes particularly noticeable on CD-ROMs that contain video or a lot of very small files. Here's a brief breakdown of the speed of a drive vs. access speed.

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