Glossary-7
resolution
The degree of screen image clarity. Video display resolution is determined by the number of
pixels on the screen. Resolution is usually specified in pixels by scan lines, for example, 640
by 480. See pixels.
RS-232C
Standard interface for serial devices.
serial interface
An interface that communicates information one bit at a time.
serial printer
A printer with a serial interface.
shadowing
To copy the system and video BIOS from chip to RAM for enhanced system performance.
software
Programs that run on a computer, such as operating systems, word processors, and
spreadsheets.
synchronous communication
Method of data transmission where transmission is regulated by a clock.
system board
The main printed circuit board inside the system unit into which other boards and major
chip components, such as the system microprocessor, are connected.
system unit
The system component that contains the computer parts, drives, power supply, and option
boards.
VGA
Video Graphics Array. Graphics technology that supports many colors and resolutions (for
example, 256 colors and a graphics resolution of 800 by 600 pixels).
