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Toshiba Satellite U200 User Manual

Page 226

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Glossary-12

User’s Manual

Glossary

Random Access Memory (RAM): High speed memory within the

computer circuitry that can be read or written to.

restart: Resetting a computer without turning it off (also called “warm boot”

or “soft reset”). See also boot.

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 card: 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: Refers to a type of information exchange that transmits

information sequentially, one bit at a time. Contrast: Parallel

interface.

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.