Epson 3865X Plus - Manual (Page 320)

Logical disk drive
A subdivision of a physical disk drive, which MS-DOS treats as
though it were a separate physical component of the computer.
A physical disk drive may be divided into several logical disk
drives.
Main system board
The board built into your computer containing the circuitry the
computer requires to operate.
Math coprocessor
An optional device that enables the computer to process certain
mathematical calculations faster.
MCGA
Monochrome/Color Graphics Adapter. A type of display
adapter that runs either a monochrome or color graphics
monitor.
MDA
Monochrome Display Adapter. A type of display adapter that
displays text in only one color, such as green or amber.
Megabyte (MB)
A unit used to measure storage space in a computer’s memory or
on a disk. One megabyte equals 1024KB.
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 Equity 386SX PLUS operates at 16 MHz or
simulates an 8 MHz operating speed.
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