Post by Bu_3abbadi on Mar 5, 2006 3:29:20 GMT
[glow=red,2,300]PC WORLD[/glow]
Millions of poeple from different parts of the world may have a computer ...... But the Question is how does it work ...... here it is the parts (most common) and the operation will be posted later 4 u guys NjOy and ask if u which guys .
[glow=red,2,300]Generally[/glow]
Many mass-market IBM PC compatible and Apple Macintosh personal computers are standardized to the point that purchased software is expected to run with little or no customization for the particular computer. Often memory and peripherals such as video boards and disk storage are easily upgradeable, even by the end user. Even the motherboard and central processing unit can be designed to be user-replacable. This upgradeability is, however, not indefinite due to rapid changes in the personal computer industry. A PC that was considered top-of-the-line five or six years prior may be impractical to upgrade due to changes in industry standards. Such a computer usually must be totally replaced once it is no longer suitable for its purpose. This upgrade and replacement cycle is partially related to new releases of the primary mass-market operating system, which tends to drive the acquisition of new hardware and tends to obsolete previously serviceable hardware.
The hardware capabilities of personal computers can sometimes be extended by the addition of expansion cards connected via an expansion bus. Some standard peripheral buses often used for adding expansion cards in personal computers as of 2005 are PCI, AGP(Peripheral Component Interconnect,Accelerated Graphics Port)(a high-speed PCI bus dedicated to graphics adapters), and PCI Express. Most personal computers as of 2005 have multiple physical PCI expansion slots. Many also include an AGP bus and expansion slot or a PCI Express bus and one or more expansion slots, but few PCs contain both buses.
[glow=red,2,300]Motherboard[/glow]
The motherboard (or mainboard) is the primary circuit board for a personal microcomputer. Many other components connect directly or indirectly to the motherboard. Motherboards usually contain one or more CPUs, supporting circuitry and ICs for CPU operation, main memory, and facilities for initial setup of the computer immediately after being powered on (often called boot firmware or a BIOS). In many portable and embedded personal computers, the motherboard houses nearly all of the PC's core components. Often a motherboard will also contain one or more peripheral buses and physical connectors for expansion purposes. Sometimes a secondary daughter board is connected with the motherboard to provide further expandability or to satisfy space constraints.
[glow=red,2,300]Central processing unit[/glow]
The central processing unit, or CPU, is the part of the computer that executes software programs, including the operating system. Nearly all PCs contain a type of CPU known as a microprocessor. The microprocessor often plugs into the motherboard using one of many different types of sockets. IBM PC compatible computers use an x86-compatible processor, usually made by Intel, AMD, VIA Technologies or Transmeta.
[glow=red,2,300]Main memory[/glow]
A PC's main memory place (or primary storage) is fast storage space that is directly accessible to the CPU. It is generally used for storing relatively short-term data needed for software execution. Main memory is usually much faster than mass storage devices like hard disks or optical discs, but is also more expensive and therefore not generally suitable for long-term or archival data storage. As with the CPU, most PCs use some form of semiconductor random access memory such as DRAM or SRAM as their primary storage.
[glow=red,2,300]Hard disk drive[/glow]
The disk drives use a sealed head/disk assembly (HDA) which was first introduced by IBM's "Winchester" disk system. The use of a sealed assembly allowed the use of positive air pressure to drive out particles from the surface of the disk, which improves reliability. This technology is now industry standard, with costs, capacities and access speeds which conform to Moore's law.
If the mass storage controller provides for expandability, a PC may also be upgraded by the addition of extra hard disk or optical drives. For example, DVD-ROMs, CD-ROMs, and various optical disc recorders may all be added by the user to certain PCs. Standard internal storage device interfaces are ATA, Serial ATA, SCSI, and CF+ Type II in 2005.
[glow=red,2,300]Graphics - Video card[/glow]
The graphics card - otherwise called a graphics adapter, video adapter, or video card - processes and renders the graphics output from the computer to the VDU or computer monitor and is an essential part of the modern computer. On older and budget models graphics cards tended to be integrated with the motherboard but, more commonly, they are supplied in PCI, AGP, or PCI Express format. Graphic cards are also the most glamorised computer component as it is the component which creates all the visual effects on the computer which is essential for playing games.
[glow=violet,2,300]The End Of Part 1[/glow]
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