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    We  know  that  a  computer  is  a  human-made  machine.  Have  you  wondered
                      how a computer works? In this chapter, we are going to learn how a computer

                      works.

                      IPO Cycle
                                                                                                                                                1.

                      Have you seen your mother making mango shake for you? This is what she does                                                    Pizza base and toppings                    Baking                         Hot pizza
                      to make the mango shake.                                                                                                                 (Input)                        (Process)                        (Output)

                      1. She puts the mango pieces, sugar and milk in the blender. (This is the input.)

                      2. The blender mixes all the things. (This is the process.)

                      3.  She pours the mango shake in the glass. Mango shake is ready to drink. (This
                         is the output.)

                                                                                                                                                2.

                                                                                                                                                             Debit Card                     ATM Machine                          Cash
                                                                                                                                                               (Input)                       (Processing)                      (Output)
                                       INPUT                                    PROCESS                       OUTPUT
                                                                                                                                                IPO Devices
                      Similarly, we give instructions to the computer; the computer then works on
                                                                                                                                                                                                              Just as bees collect nectar to
                      the instructions and gives us the result.                                                                                 A computer  is  made  up  of  many  parts.                   make honey, computers gather
                                                                                                                                                These parts are also known as devices.                        information to help us solve
                                                                                                                                                Input Devices                                               problems and learn new things.

                             The letters, numbers, symbols we give to the computer are called data.                                             The devices that are used to enter data
                                                                                                                                                into  the  computer  and  give orders  are

                                                                                                                                                called input devices. Some of the commonly used input devices are keyboard
                      The instructions that we give to the computer are called input. The working of
                                                                                                                                                and mouse.
                      the computer is called processing and the result we get is called output.

                      Thus, a computer works in three steps:

                                          INPUT → PROCESS → OUTPUT

                      This is also called IPO cycle. Let us look at some more examples of IPO cycle.

                                                                                                                                                                             Keyboard               Mouse

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