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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