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A-4 Glossary
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Power On Self-Test – a test performed by the BIOS that checks the
computer hardware for problems before fully initializing the computer.
RAM disk
A disk drive that uses RAM for the media in place of the usual rotating
disk drive.
ROM-DOS
Datalight operating system that can be placed in and execute from within
a ROM.
ROM disk
A disk drive that uses ROM for the media in place of the usual rotating
disk drive.
ROM scan
The scanning of the ROM area for BIOS extensions performed by the
BIOS at initialization time.
ROM
Read Only Memory. This is memory that is not changeable once placed
in a computer.
Shell
The Shell is the command interpreter, usually COMMAND.COM. The
shell takes text commands and calls the DOS kernel to implement them.
System disk
See Bootable disk.