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User’s Manual Glossary-14
Glossary
R
Radio frequency interference (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
classification for home equipment use. TOSHIBA portable
computers comply with Class B computing device regulations.
Random Access Memory (RAM): Volatile memory that can be written to
as well as read. Volatile here means that information in RAM is lost
when you turn off your computer. This type of memory is used for
your computer's main memory. See also memory. Compare ROM.
resolution: A measure of the sharpness of the images that can be
produced by a printer or displayed on a screen. For a printer,
resolution is expressed in dots per inch (dpi). For a screen, it is
expressed as the number of pixels available horizontally and
vertically
restart: Resetting a computer without turning it off (also called "warm
boot", "soft reset" or "reboot"). 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.
RJ45: A modular LAN jack.
Read Only Memory (ROM): Non-volatile memory that can be read but
not written to. Non-volatile here means that information in ROM
remains whether or not the computer is receiving power. This type
of memory is used to store your computer's BIOS, which is
essential instructions the computer reads when you start it up. See
also BIOS, memory. Compare RAM.
S
S/P DIF: A standard of digital interface for audio.
SCSI: Small Computer System Interface is an industry standard interface
for connection of a variety of peripheral devices.
SD/SDHC Card: Secure Digital cards are flash memory widely used in a
variety of digital devices such as digital cameras and Personal
Digital Assistants.