Radio frequency interference (RFI) shield
interference. All computer equipment
generates radio frequency signals.
The FCC regulates the amount of
signals a computing device can allow
past its shielding. A Class A device is
sufficient for office use. Class B
provides a more stringent classifica-
tion for home equipment use.
TOSHIBA portable computers comply
with Class B computing device
regulations.
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 manufac-
tured to contain information that
controls the computer's basic opera-
tion. You cannot access or change
information stored in ROM.
Glossary-12
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 Assis-
tants.
SIO: Serial Input/Output. The
electronic methodology used in serial
data transmission.
Smart media: A storage card of
about one-thirds of the area of a
conventional PC card and only
0.76mm thickness. It can be used in
equipment that requires a removable
memory chip for portability.
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.