Epson Progression U12 - Manual (Page 200)

MCGA
Multi-color Graphics Array. A type of display adapter that
emulates a color graphics adapter (CGA). MCGA provides two
additional modes: 640 x 480 in two colors and 320 x 200 in 256
colors. See also CGA.
MDA
Monochrome Display Adapter. A type of display adapter that
displays in 80 column by 25 line text mode 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 (kilobytes). See also
Byte.
Megahertz (MHz)
A unit used to measure oscillation frequency, such as that of a
computer’s internal clock. A megahertz is one million cycles
per second.
Memory
The circuitry in your computer that stores data for possible
retrieval. Memory contents are stored permanently (in ROM) or
temporarily (in RAM).
Memory module
A small circuit board that contains surface-mounted memory
chips. You can add memory modules to the main system board
to expand your computer’s memory. Commonly called a SIMM
(single inline memory module).
Glossary 13