High-density

A type of format that allows you to store more data than on single- or double-density diskettes. A 5¼-inch high-density diskette can store 1.2MB of data. A 3½-inch high-density diskette can store 1.44MB of data.

Input/output (I/O) port

See Port.

Interface

A physical or software connection used to transmit data between equipment or programs.

ISA

Industry Standard Architecture. The 8- or 16-bit bus standard developed for IBM compatible computers.

Jumper

A small device that connects two pins on an option card, a disk drive, or the main system board to close an electrical circuit and activate a particular function.

Key disk

A diskette containing a copy-protected program that must remain in the diskette drive while you are using the program.

Kilobyte (KB)

A unit used to measure storage space in a computer’s memory or on a disk. One kilobyte equals 1024 bytes.

8 Glossary