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    WORKING OF A COMPUTER

                     As we have discussed earlier, a computer can do a lot of things. Let us understand
                     how a computer works.

                     A computer works in three steps: Input                Process       Output (IPO). This is also
                     called the IPO cycle.

                                       Input                     Process                     Output

                     INPUT

                     We enter data and instructions into the computer which is called input. The devices
                     which are used to send input to a computer are called input devices.

                     PROCESS

                     A computer works on data (input) to produce meaningful information with the help of

                     processing device known as the CPU (Central Processing Unit). This conversion of
                     data into information is called processing. CPU is also called the brain of a computer.

                     OUTPUT

                     The result received after processing is called output. The devices which are used to
                     display the results are called output devices.

                             Input Device                     Processing Device                    Output Device

                               PARTS OF A COMPUTER

                     The computer system is made up of two parts—Hardware and
                     Software. Let’s learn about hardware and software in detail.

                               HARDWARE

                     The term hardware refers to the parts of a computer that we can see and touch. In
                     other words, hardware are the tangible parts of a computer system.

                                                                                                Hardware and Software  9

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