Radio frequency interference (RFI) shield
GLOSSARY
R
Radiofrequencyinterference(RFI) shield: A metal shield enclosing the printed circuit boards of the printer or computer to prevent radio and TV 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.
RandomAccessMemory(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.
Glossary-12
ROM: Read Only Memory: A nonvolatile memory chip manufac- tured 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 Assis- tants.
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.
