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Sony VAIO Desktop User Guide
Glossary
88
nN
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.
DVD-RW
A rewritable DVD, based on the DVD-R format, that can be used to write, erase and rewrite
a program or other data approximately 1,000 times.
See http://www.dvdrw.com
for more information on the DVD-RW.
DVD+RW
The DVD+RW is a slightly different rewritable DVD format, backed by a group of companies
known as the DVD+RW Consortium, which includes Sony. Its advantages include high-
compatibility, high capacity and easy-to-use functionality. Like the DVD-RW, it can be
rewritten about 1,000 times. However, a DVD+RW drive writes at a higher speed than a
DVD-RW drive.
See http://www.dvdplusrw.org
for more information on the DVD+RW.
Term Definition