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. Depending on the model you have, your computer operates at 25 MHz or 50 MHz and can simulate an 8 MHz operating speed.
Memory
The area where your computer stores data. Memory contents are either permanent (ROM) or temporary (RAM).
Memory module
A small circuit board that contains memory chips. You can add 256KB or 1MB memory modules to the memory card inside the computer to expand the computer’s memory. A memory module is commonly called a SIMM (single inline memory module).
Memory on card
The additional memory on an optional memory card installed in the computer.
MGA
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