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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