Epson Progression U12 - Manual (Page 208)

Software
The collection of instructions (or programs) that tell your
computer hardware to perform the tasks and functions you
specify. See also Hardware and Program.
Subdirectory
In a hierarchical disk directory structure, a group of files in a
directory that is contained within another directory or the root
directory.
Switch
An optional specifier added to an MS-DOS command that
modifies the way the command works. Switches are typically
preceded by a / (forward slash). See also Command and
Parameter.
System diagnostics
A series of tests you can perform on the computer’s
components and some peripheral devices to make sure they are
functioning correctly.
System diskette
A diskette that contains the operating system and that can be
used to boot the computer.
Tape drive
The physical device that allows you to insert large-capacity
magnetic tape cartridges for compact data storage and backup.
Glossary 21