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Toshiba Portege R400 User Manual

Page 193

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User’s Manual

Glossary-13

Glossary

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.

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.

TFT display: A liquid crystal display (LCD) made from an array of liquid

crystal cells using active-matrix technology with thin film transistor
(TFT) to drive each cell.

Touch Pad: A pointing device integrated into the TOSHIBA computer palm

rest.

TTL: Transistor-transistor logic. A logic circuit design that uses switching

transistors for gates and storage.