Tracks
Addressable, concentric circles on a disk, resembling the
grooves on a record, which divide the disk into separate
accessible areas. On a tape cassette, the tracks run parallel to
the edge of the tape. See also
Sector.
Unix
A powerful operating system that supports multitasking and
is especially 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 that provides a variety of video modes. Your
computer’s built-in VGA controller supports resolutions up to
1024 x 768 on a compatible monitor.
Video card
See Display adapter card.
Write
To transfer data to a storage device (such as a disk) or an
output device (such as a monitor or printer). Data written to a
disk is stored for later retrieval.
See
also
Read.
Write-protect
To protect the data on a diskette from being changed by setting
the write-protect switch on a 3.5-inch diskette or by placing a
write-protect tab over the notch on a 5.25-inch diskette. You can
also write-protect a file on a disk by using software to designate
the file read-only. When a diskette or file is write-protected,
you cannot erase, change, or record over its contents.
22 Glossary
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