Epson Equity 486DX2/50 PLUS 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. 18 Glossary