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Glossary
5.375 x 8.375 ver 2.3
bus — An electrical circuit that connects the central processing unit
(CPU) with other parts of the computer, such as the video adapter,
disk drives, and ports. It is the pathway through which data flows
from one device to another. See also bus speed, frontside bus.
bus speed — The speed at which the central processing unit (CPU)
communicates with the other parts of the computer.
byte — A sequence of eight bits. A byte is the smallest addressable unit
of data. See also bit, gigabyte, kilobyte, megabyte.
C
cache — A section of very fast memory in which frequently used
information is duplicated for quick access. Accessing data from
cache is faster than accessing it from the computer’s main memory.
See also CPU cache, L1 cache, L2 cache.
CD — An individual compact disc. See also CD-ROM.
CD-ROM (compact disc read-only memory) — A form of high-
capacity storage that uses laser optics instead of magnetic means for
reading data. See also CD. Compare DVD-ROM.
central processing unit (CPU) — The chip that functions as the “brain”
of the computer. It takes information from outside sources, such as
memory or keyboard input, processes the information, and sends the
results to another device that uses the information.
character — Any letter, number, or symbol you can use on the
computer. Some characters are non-printing characters, such as a
paragraph break in a word-processing program. A character
occupies one byte of computer storage.
chip — A small piece of silicon containing computer logic and circuits
for processing, memory, input/output, and/or control functions.
Chips are mounted on printed circuit boards.
click — To press and release the TouchPad control button or mouse
button without moving the cursor or mouse. In the Windows
®
operating system, this refers to the left mouse button or primary
TouchPad control button, unless otherwise stated. See also double-
click.
color palette — A set of specified colors that establishes the colors that
can be displayed on the screen at a particular time.