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PCMCIA
Personal Computer Memory Card International Association. A standards body that develops standards for portable accessories like network cards.
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Peer-to-peer network
Network of minimal security where all computers can act as a server to the other computers on the network. ie Napster
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PetaByte
1 Petabyte equal to 1024 terabytes or approx. 1,000,000,000,000,000 bytes. 1 PB has the value of 2 to the power of 50.
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PGA
Pin Grid Array, the method in which the CPU uses to interact with the CPU socket. [image]
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Pincushin
Corrects the curve at the vertical edges of a monitors display.
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port
Receptacle that connects to a cable.
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POST
Power On Self Test, a quick the BIOS does on the components in the computer to make sure everything is working when you first turn it on.
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PowerNow!
technology used by AMD processors to extend battery life for notebooks. It adjusts the power draw of the processor to correspond to the demand of the current application. Can improve battery life by 30%.
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print server
Network device that connects at least one printer to be shared among network users.
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Processor
Short for Central Processing Unit or CPU, the brains of any computer. The Intel Pentium line of processors and the AMD Duron and Athlon processors are classed as CPU's.
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PSU
Power Suppy Unit - The powersupply supplies electricity to the motherboard, device drives and any other peripherials in the computer. [image]
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RAID
RAID stands for Redundant Array of Independent Disks. Several different forms of RAID implementation have been defined. Each form is usually referred to as a "RAID level."
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RAID 0+1
Combines RAID 0 striping and RAID 1 mirroring. This level provides redundancy through mirroring.
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RAID-0
Block "striping" across multiple drives is provided, yielding higher performance than is possible with individual drives. This level does not provide any redundancy.
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RAID-1
Drives are paired and mirrored. All data is 100 percent duplicated on a drive of equivalent size.
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RAID-10
Combines RAID 0 striping and RAID 1 mirroring spanned across multiple drive groups. This level provides redundancy through mirroring.
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RAID-3
Data is "striped" across several physical drives. Maintains parity information which can be used for data recovery.
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RAID-5
Data is "striped" across several physical drives. For data redundancy, drives are encoded with rotated XOR redundancy.
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Ram
Random Access Memory.
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RAMDAC
Random Access Memory to Digital Analog Converter. A chip on videocard which turns digital signals to analog ones which can be outputed to a monitor.
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RDRAM
Rambus DRAM, a totally new DRAM architecture that has a huge ammount of memory bandwidth, however has a high latency penalty. RDRAM is best suited for processors that need high bandwidth like Pentium 4 processors
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Reflective LCD
Reflective LCD technology makes use of only the surrounding ambient light to illuminate the display. Beneath the surface of the display a rear polarizer is combined with a reflector assembly to bounce back ambient light. The technology really only works well in fairly bright light only. The colours are little different from what you might normally be used to, but the display is clear and readable so long as the text is highly contrasted to the background.
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Refresh Rate
The amount of times the monitor refreshes (redraws) the picture on the screen. Refresh rates above 75 Hz are recommended since anything lower will cause headaches after a prolonged period of time.
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Resistor
A device used to control current in an electric circuit by providing resistance.
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Resolution
The pixel size of a display. 800x600 has a horizontal width of 800 pixels while a 600 pixel vertical length.
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Rimm
Rambus memory module. [image]
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Risc
Reduced Instruction Set Computing, an architecture for an application-specific processor.
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Riser
A device that is an add from another card, takes up an expansion slot however doens't plug directly into the motherboard.
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RJ-11
Connector at the end of a standard telephone cable.
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RJ-45
Registered Jacks, sometimes described as RJ-XX. Series of telephone connection interfaces that are registered with the FCC. The most common telephone jack is the RJ-11 jack, which can have six conductors but usually is implemented with four. The RJ-11 jack is likely to be the jack that your household or office phones are plugged into from the ordinary "untwisted" wire that people are most familiar with. The RJ-45 is a single-line jack for digital transmission over ordinary phone wire, either untwisted or twisted. The interface has eight pins or positions.
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Glossary has 10 pages :
[
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10
| Previous
| Next
]
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