II. PROCESSING DEVICES

1. CPU : Central Processing Unit, or in short the CPU, is the core processor of the Computer, and computes all that is
requested. It is the brain of the computer, and its speed in measured in Hz (hertz) the faster the CPU, the faster is the
processing power. Major manufacturers of the CPU in the world are INTEL, AMD, IBM, MOTOROLA. Out of
which Intel sells more all of them put together. Intel Pentium-4 (2.4Ghz) is the common current generation of
Processor which is used in wide variety of applications such as graphic intensive jobs, office applications,
Multimedia Applications etc.
2. RAM : Random Access Memory or commonly known as RAM, is like the number of working hands in a
computer. The more the hands the faster the information shall flow, between the input and the output. It commonly
comes in SIMM (Single Integrated Memory Module) and DIMM (Dual Integrated Memory Module). High end
RAM for servers comes with “Error Correction Control” a safety feature designed to handle large flow of Instruction
without any loss, or stability.
3. MOTHERBOARD : As the terms suggests is the coordinator of the computer which houses all the elements of
the computer, including the CPU, RAM, connections to Storage devices, Input and Output Devices. It has empty
slots for connecting accessories such as scanners, printers, TV’s, Multimedia, Projectors, etc
4. VGA refers to Video Graphic Adapter, which is built on the motherboard, in which case it shares memory from
RAM. The other form is when it is present independently on a card, and can be inserted in one of the available empty
slots on the motherboard. In both the cases the function is the same, it connects the monitor to the CPU. High end
VGA cards are used in doing graphic intensive applications such as designing, or playing 3d games, and watching
movies.
5. SOUND CARD is a device used to play music, voice on the computer or for recording through a micro phone
through its input and output ports. Bundled together with matching speakers, software, and DVD drive, they can
convert an ordinary PC to a great home theater system offering upto 7.1 Channel Dolby digital technology.