Winbook SI, User Manual

Page: 187 / 216

PS/2 Pointing Device
Pointing device that uses a PS/2 interface connector to plug into the
computer, e.g. a mouse or trackball.
RAM (Random Access Memory)
The working memory of a computer which is used to run programs
and hold active files. The RAM becomes active each time the computer
is booted and is shut down each time the computer is turned off. RAM
is usually measured in megabytes.
Refresh Rate
The speed at which a monitor sends a new image to the screen. A
cathode ray tube (CRT) sends an image vertically down a screen one
line at a time. The whole screen is thus refreshed at a certain interval
(as the CRT cycles down the screen and then returns to the top). This
speed is usually measured in Hz, which is a unit of frequency. A refresh
rate of 60 Hz will produce a slightly perceptible flicker of the screen
that can cause eye strain. A rate of 72 Hz or faster will usually produce
a comfortable image. Your monitor may refresh as different frequencies
depending on the resolution.
ROM (Read Only Memory)
A memory chip or medium that permanently stores information.
The information cannot be altered.
SCSI Cards
Interface cards that connect your computer to accessories, usually disk
drives, that conform to the Small Computer Systems Interface standard.
R-S
Glossary
G.13
Si Series Manual 2/18/00 4:09 PM Page 191