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Desktop	Laptop	Monitor	LED/ LCD	Tablet PC Price
CPU	RAM	Harddisk	Motherboard	Cabinet
K/B-Mouse	Multimedia	Graphics Card	Networking	CCTV
DVD Writer	Printer	UPS/ Invertor	Mobile/iphone	Digital Camera
Pen Drive	Headphone	Web Cam	Web Hosting	Scanner
LAN Card	Sound Card	TV Tuner Card	Data Card	Accessories

Basic computer components Input devices Keyboard Image scanner Microphone Pointing device  Graphics tablet Joystick Light pen Mouse Pointing stick Touchpad Touchscreen Trackball Webcam  Softcam Refreshable braille display Output devices Monitor Refreshable braille display Printer Speakers Plotter Removable data storage Optical disc drive  CD-RW DVD+RW Disk pack Floppy disk Memory card USB flash drive Computer case Central processing unit (CPU) HDD / SSD / SSHD Motherboard Network interface controller Power supply Random-access memory (RAM) Sound card Video card Data ports Ethernet FireWire (IEEE 1394) Parallel port Serial port USB audio jack

this is computer system

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COMPUTER

Common Operating Machine Particularly Used for Trade, Education, and Research

Modern Computers Defined

Modern computers are electronic and digital. The actual machinery -- wires,transistors, and circuits -- is called hardware; the instructions and data are called software.

All general-purpose computers require the following hardware components:

memory: enables a computer to store, at least temporarily, data and programs.

mass storage device: allows a computer to permanently retain large amounts of data. Common mass storage devices include disk drives and tape drives.

input device: usually a keyboard and mouse, the input device is the conduit through which data and instructions enter a computer.

output device: a display screen, printer, or other device that lets you see what the computer has accomplished.

central processing unit (CPU): the heart of the computer, this is the component that actually executes instructions.

In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another.

What is a Computer?

A computer is a programmable machine. The two principal characteristics of a computer are: it responds to a specific set of instructions in a well-defined manner and it can execute a prerecorded list of instructions (a program).

this is cmputer mother borad

computer are simple machine and all person are learn&start