Hidden file

A file whose name is not listed by the DIR command. MS-DOS stores two hidden files in the root directory of your hard disk. Some application programs also create hidden files.

High-density

A type of diskette. High-density, 3 l/z-inch diskettes have a
capacity of 1.44MB.

Input/output (I/O) port

See Port.

Interface

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

Internal command

A command, such as DIR or ERASE, that MS-DOS does not store in a separate program file. You can execute internal commands from any drive or directory.

Kilobyte (KB)

A unit used to measure storage space in a computer’s memory or on a disk. One kilobyte equals 1,024 bytes.

LCD

Liquid Crystal Display. A form of flat panel display.

Log on

To make a drive or directory the current drive or directory.
12 Glossary