Default

Any value or setting that takes effect when the computer is turned on or reset. A default value stays in effect unless you override it temporarily by changing a setting or you reset the default value itself.

Device driver

A file containing instructions that allow your computer to recognize and control a device.

Diagnostics

The tests and procedures the computer performs to check its internal circuitry and set up its configuration.

DIP switch

Dual Inline Package switch. A small switch on a computer, option card, or printer that controls a particular function.

Directory

A list of files stored in a particular area on a disk; part of a structure for organizing files into groups. A directory listing shows the name, location, and size of the files in the directory. A directory can contain both files and subdirectories.

Display adapter card

A circuit board installed in one of the computer’s option slots to provide the monitor interface. A display adapter card controls the way the monitor displays text and graphics. Also known as

Video card.

G l o s s a r y 5