User’s Manual
Glossary-12
Glossary
RGB:
Red, green, and blue. A device that uses three input signals, each
activating an electron gun for a primary additive color (red, green,
and blue) or port for using such a device.
See also
CRT.
RJ11:
A modular telephone jack.
RJ45:
A modular LAN jack.
ROM:
Read Only Memory: A nonvolatile memory chip manufactured to
contain information that controls the computer’s basic operation.
You cannot access or change information stored in ROM.
S
SCSI:
Small Computer System Interface is an industry standard interface
for connection of a variety of peripheral devices.
SD cards:
Secure Digital cards are flash memory widely used in a variety
of digital devices such as digital cameras and Personal Digital
Assistants.
serial communications:
A communications technique that uses as few as
two interconnecting wires to send bits one after another.
serial interface:
Refer to a type of information exchange that transmits
information sequentially, one bit at a time.
SIO:
Serial Input/Output. The electronic methodology used in serial data
transmission.
soft key:
Key combinations that emulate keys on the IBM keyboard,
change some configuration options, stop program execution, and
access the numeric keypad overlay.
software:
The set of programs, procedures and related documentation
associated with a computer system. Specifically refers to computer
programs that direct and control the computer system’s activities.
See also
hardware.
stop bit:
One or more bits of a byte that follow the transmitted character or
group codes in asynchronous serial communications.
subpixel:
Three elements, one red, one green and blue (RGB), that make
up a pixel on the color LCD. The computer sets subpixels
independently, each may emit a different degree of brightness.
See
also
pixel.
synchronous:
Having a constant time interval between successive bits,
characters or events.
system disk:
A disk that has been formatted with an operating system.
For MS-DOS the operating system is contained in two hidden files
and the COMMAND.COM file. You can boot a computer using a
system disk. Also called an operating system disk.
T
terminal:
A typewriter-like keyboard and CRT display screen connected to
the computer for data input/output.
