Epson 486SX User Manual page 222

Switch
An option added to a command that modifies the way the
command works. Switches are usually preceded by a /
(forward slash). For example, if you add the /S switch to a
FORMAT command, MS-DOS installs the operating system on
the diskette as it formats it. See also Parameter.
System diagnostics
A series of checks you can perform on the computer to make
sure the hardware is functioning correctly.
System diskette
A diskette that contains the operating system and allows you to
boot the computer.
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. The VGA adapter built into the system board of
your computer can display 16-color graphics at resolutions
up to 1024 x 768 or 256-color graphics at resolutions up to
640x480.
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Glossary