Jumper

A small moveable plug that connects two pins on a device’s circuit board. Jumpers can be used to alter the operation of a particular function.

Key disk

A diskette containing a copy-protected program and that must remain in a diskette drive while you use the program. See also

Copy-protected program.

Kilobyte (KB)

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

LIM EMS 4.0

Version 4.0 of the Lotus/Intel/Microsoft Expanded Memory Specification-a description of a capability your computer has for supporting programs that use expanded memory. See also

Expanded Memory.

Main system board

The board built into your computer containing the circuitry and the primary components your computer needs to operate. Other boards, such as option cards, can be installed in the option slots (bus connectors) on the main system board. Also called motherboard.

Math coprocessor

An optional device that enables the computer to process mathematical calculations faster by using floating point numbers instead of whole numbers. This speeds up certain math and graphics operations performed by programs that use this type of calculation.

12 Glossary