Epson EQUITY 386SX/16 PLUS - Manual (Page 250)

Shadow RAM
The feature provided by the Equity 386SX/16 PLUS that
enables the computer to copy the system ROM BIOS and
video ROM into the RAM area of memory to speed up
processing.
SIMM
See Memory module.
Software
The programs that enable your computer to perform the tasks
and functions you indicate.
Subdirectory
A directory or group of files that branches down from
another subdirectory or from the root directory.
Switch
An option added to an MS-DOS 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.
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Glossary