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Internal command
An MS-DOS
command
that is stored in the command
processor of the operating system; it is not a separate program
file. This means that you can execute an internal command
without specifying a pathname. Examples include COPY, DEL,
RENAME, and DIR. Unlike external commands, internal
commands can be executed from any drive or directory.
Jumper
A small device that fits over two small pins on a circuit board
to activate a particular function.
Keyboard
A device resembling a typewriter keyboard to enter letters and
numbers to the computer.
Kilobyte (KB)
A unit used to measure storage space in a computer’s memory
or on a disk. One kilobyte equals 1024 bytes.
Math coprocessor
An optional device that enables the computer to process
certain mathematical calculations faster.
Megabyte Text
A unit used to
measure
storage space in a computer’s memory
or on a disk. One megabyte equals 1,048,576 bytes.
Megahertz (MHz
A unit used to measure oscillation frequency (of a computer’s
internal timing clock). A megahertz is one million cycles per
second. The Apex operates at 4.77 MHz or 10 MHz.
Glossary 9