What is Computer?

 What is Computer??


The term 'Computer' is derive from the Latin word 'Computer', this means to calculate.

     Computer is an advance electronic device, which takes raw data as input from the user and processes these data under the control of set of instructions (called program) and given the result (output). It also saves output for the future use. It can process both numerical and non- numerical (arithmetic and logic) calculations. 

      In other words, computer is a programmable machine that stores and retrieves data and performs high-speed logical and mathematical operations. The working principle of computer can be summarized as input, process and output cycle.

IPO Cycle: 

Input         >           Process       >        Output

(Data)                    (Unseen)               (Result)

[Input Device]        [CPU]              [Output Device]

-Mouse                   (ALU+CU)          - Monitor

-Keyboard                                          - Printer

- Scanner                                            - Plotter

-Microphone

-Joystick

-Light Pen

-Touch Pad

-BCR/OCR/MIRC/

Input (Data): Input is the raw information entered into a computer from the input devices. It is the collection of letters, numbers, images etc. Keyboard, mouse, Scanner, Digital/Web Camera, Joystick etc. are some of the input devices.

Process: Process is the operation of data as per given instruction. It is totally internal process of the computer system. CPU (Central Processing Unit) is the main Processing Device.

Output: Output is the processed data given by computer after data processing. Output is also called as Result. We can save these results in the storage devices for the future use.Monitor (Screen) and Printer are the major Output Devices.




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