Sony PCG-GR214CP Instruction & Operation Manual page 115

Glossary
Term
PSTN
RAM
Resolution
RGB signal cable
SDRAM
SELV
Standard RAM
System recovery
Definition
PSTN (Public Switched Telephone Network) refers to the plain old telephone service, the
national telecommunication networks implementing voice transmission by using analog
signals.
Short for Random Access Memory, the memory used to run programs and store data in
current use. RAM is the fastest kind of memory to read from and write to. Information stored
in RAM is lost when you turn off the computer. The higher the RAM capacity, the faster your
current data can be processed.
The degree of sharpness and clarity of an image. Resolution is expressed in pixels. Frequent
computer screen resolutions are 640 x 480 pixels (VGA resolution; appropriate for a 14-inch
screen), 800 x 600 (appropriate for a 15-inch screen), 1,024 by 768 (appropriate for a 17-inch
screen), and 1,280 by 1,024. LCD displays usually use a higher resolution than a CRT of the
same size.
RGB stands for Red, Green, Blue. A cable that requires separate transmission types for the
three colours on the display.
Synchronous DRAM is a kind of dynamic random access memory running at a much higher
clock speed than regular memory.
Short for Safety Extra Low Voltage. A secondary circuit which is so designed and protected
that its voltages do not exceed a safe value under normal operating conditions.
The amount of RAM that is available on your computer when you purchase it.
A recovery process that enables you to recover the hard disk image initially available on the
computer. Performing a system recovery is useful in the event of a serious system crash or if
you want to modify the size of your partitions.
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