Epson 386SX - Manual (Page 273)

Source diskette
The diskette that you are reading or copying data from during a
copy or backup operation.
SP card
The circuit board inside the computer that provides the serial
and parallel interfaces.
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
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.
Target diskette
The diskette to which you are writing or copying data during a
copy or backup operation.
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