Tracks

Addressable, concentric circles on a disk, resembling the grooves on a record, which help to divide the disk into separate accessible areas.

UNIX

An operating system that supports multitasking and is suited to multi-user environments. UNIX is compatible with a range of computers, from personal computers to mainframes. See also

Operating system.

VGA

Video Graphics Array. A type of high-resolution display adapter.

Video card

See Display adapter card.

Write-protect

To protect the data on a diskette from being changed by placing a write-protect tab over the notch on a 5¼-inch diskette or by setting the write-protect switch on a 3½-inch diskette. When a diskette is write-protected, you cannot erase, change, or record over its contents.

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