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We all know that machines make our work faster and easier. Different types of

                  machines are designed to perform different types of tasks. Some machines are used                                                   WORKING OF A COMPUTER
                  to perform only one type of task. For example:                                                                            As we have discussed earlier, a computer can do a lot of things. Let us understand

                                                                                                                                            how a computer works.
                     A washing machine is used to wash clothes.
                                                                                                                                            A computer works in three steps: Input                Process        Output (IPO). This is also
                     A music system is used to play music.
                                                                                                                                            called the IPO cycle.
                  Whereas, a computer is used to do multiple tasks. For example:
                                                                                                                                                              Input                      Process                     Output
                     Search for information                       Send emails

                     Play games                                   Play music                                                                INPUT


                     Store information                            Solve mathematical problems                                               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.

                           FEATURES OF A COMPUTER                                                                                           PROCESS


                  A computer has many unique features that make it a                                                                        A computer works on data (input) to produce meaningful information with the help of

                  wonder machine. Some features are given below:                                                                            a 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.
                  Speed: It does calculations at a very high speed.
                                                                                                                                            OUTPUT

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

                                                     Accuracy: It  performs  calculations  without  making
                                                     any mistakes. However, we can get incorrect output if

                                                     inaccurate data is fed into the computer.



                                                                                                                                                     Input Device                    Processing Device                    Output Device


                  Versatility: It performs various  types  of jobs  at  the

                  same time.                                                                                                                          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.
                                                        Memory: It stores  huge  amounts  of data  and

                                                        information that can be retrieved quickly and easily                                          HARDWARE
                                                        when needed.
                                                                                                                                            The term ‘hardware’ refers to the parts of the computer that we can see and touch.
                                                                                                                                            In other words, hardware is the tangible part of a computer system.



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