Glossary
Sony Notebook User Guide
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Term | Definition |
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PSTN | PSTN (Public Switched Telephone Network) refers to the plain old telephone service, the |
| national telecommunication networks implementing voice transmission by using analog |
| signals. |
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RAM | 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. |
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Resolution | 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 |
| screen), 800 x 600 (appropriate for a |
| screen), and 1,280 by 1,024. LCD displays usually use a higher resolution than a CRT of the |
| same size. |
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RGB signal cable | RGB stands for Red, Green, Blue. A cable that requires separate transmission types for the |
| three colours on the display. |
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SDRAM | Synchronous DRAM is a kind of dynamic random access memory running at a much higher |
| clock speed than regular memory. |
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SELV | 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. |
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Standard RAM | The amount of RAM that is available on your computer when you purchase it. |
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System recovery | 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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