Epson Apex 20020 - Manual (Page 241)

Serial
The type of interface that transmits data one bit at a time. See
Interface and Parallel.
Software
The programs that enable your computer to perform the tasks
and functions you indicate.
Source diskette
The diskette that you are reading or copying data from during a
copy or backup operation.
Stop bit
A signal sent in serial communications to mark the end of a
character.
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 a diskette as it formats it. See Parameters.
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.
Glossary 15