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STORAGE DEVICES

            The devices that are used to store data or information are called storage devices.

            We can store songs, pictures, games, videos and many other forms of data on them.
            The most commonly used storage devices are:

            Hard disk: A hard disk is the main storage device fixed inside
            the CPU box. It stores the  largest amount of data as compared

            to other storage devices.
                                                                                               Hard disk


                            Compact Disc or CD: A compact disc or CD is a flat, circular piece of
                            plastic with a shiny surface on one side. It stores less amount of data.


                  CD

            Digital Versatile Disc or DVD: A digital versatile disc looks like a CD
            but can store six times more data than a CD.
                                                                                                        DVD

                                  Pen drive: A pen drive is a very small and a light portable device
                                  that can store and transfer data from one computer to another.

                                  A pen drive can store more data than a CD or DVD. It is also
                Pen drive         called a flash drive.


                                                                                                PURE
                    The first hard disk was introduced by IBM. It could store one MP3 song only.   FACT






                       SOFTWARE


            A computer hardware has numerous features, but it cannot perform a task until
            certain instructions are given to it. Hardware needs step-by-step instructions to
            perform a task. A set of instructions given to the computer to perform specific tasks

            is called a Program. A collection of programs is called a Software. It also helps
            the computer hardware to process the input and convert it into output. Without

            software, a computer is like a car without fuel. Software are mainly of two types:

                                                       SOFTWARE




                           System Software                                Application Software



                                                                                       Hardware and Software  13
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