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Sony VAIO Desktop User Guide
Glossary
109
nN
CardBus
CardBus is the commercial name for an advanced PC Card. The CardBus technology allows
computer users to enjoy higher performances as far as data transfer and operating speed are
concerned. See PCMCIA.
CD-ROM
Abbreviation for Compact Disc Read-Only Memory. A high-capacity optical disc, usually
650 MB in size, capable of being read from but not written to.
CD-RW
Short for Compact Disc-ReWriteable. Compact Disc that can be used to write or rewrite data
to it. A CD-RW can be written to several times, a CD-R can only be written to once.
CNR
Short for Communication and Networking Riser. A hardware device that plugs into a
motherboard and holds chips for functions like modems and audio devices.
CPU
The CPU (Central Processing Unit) is the brains of the computer; it processes the instructions
of your system’s programs. The CPU is also known as the processor or microprocessor and can
be found on the motherboard of your computer.
CRT
A cathode ray tube (CRT) is a specialized vacuum tube in which images are produced when
an electron beam strikes a phosphorescent surface. Most desktop computer displays make
use of CRTs. The CRT in a computer display is similar to the "picture tube" in a television
receiver.
DC In
The Direct Current interface to which you connect your computer’s AC adapter or power
cable.
Driver
A driver is software enabling you to use hardware devices. For example, in order for you to
be able to use a printer, you must first install its driver. Many drivers, such as the mouse
driver, come with the operating system.
DVD-ROM
Short for Digital Versatile Disc. A type of read-only CD with a minimum capacity of 4.7 GB
(maximum capacity can reach 17 GB). This high storage power makes it the ideal medium for
storing films.
Term Definition