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IPO Cycle

                 A computer works on the IPO (Input-Process-Output) cycle.




                                       INPUT                 PROCESS                  OUTPUT


                                       3, 6, +                  3 + 6                     9

                                                   Data                 Information











                                      Keyboard                       CPU                  Monitor




                 Input


                 The data and instructions we give to the computer are called Input. The device
                 that is used to send input to a computer is an input device.
                 Process


                 The computer works on the data entered by the user. It converts the data into
                 meaningful information with the help of the processor which is CPU (Central

                 Processing Unit). This conversion of data into information is called processing.
                 Output


                 The result we get after processing the data and instructions is called output. The
                 output displayed on the screen of a monitor is called soft copy. A printout of the

                 soft copy on paper is called hard copy.

                     TYPES OF COMPUTERS

                 All types of computers have a CPU, keyboard, and a screen to display the output.
                 But they differ in their size, shape cost and speed. Let us learn more about them.

                 Microcomputers


                 These computers are made to be used by one person at a time. Desktops, laptops,
                 tablets, and smartphones are called Microcomputers. They are also called Personal

                 Computers (PCs).




                                                                                           A Computer System     13
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