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    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

                     SYSTEM SOFTWARE

                     System  software is a set  of programs that control the overall  functioning  of a
                     computer. They are designed to operate, control and run a computer's hardware

                     and application programs.

                     When we switch on a computer, the system software prepares the computer for you to
                     work on it. It loads important files so that you can work and run the application software.

                     The operating system is an example of system software. Without an operating system,
                     a computer cannot function. It acts as a manager between the computer hardware and
                     the user. Microsoft Windows is the most popular operating system available today.

                                                                                                Hardware and Software  13

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