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.

LIM EMS 4.0

Version 4.0 of the Lotus/Intel/Microsoft Expanded Memory Specification-a protocol that allows certain application programs to use memory above 1MB. To take advantage of LIM EMS 4.0, you must have the file EEMM386.EXE on your hard disk and you must modify the CONFIG.SYS file. See Chapter 5.

Logical disk drive

A subdivision of a physical disk drive, treated by MS-DOS as though it were a separate physical component of the computer. A physical disk drive may be divided into several logical drives.

Main memory

The amount of memory in the computer up to 1MB that is available to MS-DOS and application programs. Also called base memory.

Math coprocessor

An optional device that enables the computer to process certain mathematical calculations faster.

MCGA

Monochrome/Color Graphics Adapter. A type of adapter that runs either a monochrome or color graphics monitor.

MDA

Monochrome Display Adapter. The type of adapter that displays monochrome text on a monochrome monitor.

Megabyte (MB)

A unit used to measure storage space in a computer’s memory or on a disk. One megabyte equals 1,048,576 bytes.

Glossary 9