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User’s Manual Glossary-12
Glossary
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.
RJ11: A modular telephone jack.
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 memory card: Secure Digital cards are flash memory widely
used in a variety of digital devices such as digital cameras and
Personal Digital Assistants.
SECAM L: SECAM (Sequential Color Memory) is a broadcasting standard
used in France.
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.
synchronous: Having a constant time interval between successive bits,
characters or events.