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Serial
The type of interface that transmits data one bit at a time. See
Interface and Parallel.
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 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.
18 Glossary