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    CD/DVD
                                                                                                       CD          DVD
                      A  Compact Disc (CD)  and  a  Digital Versatile Disc

                      (DVD) are used to store music, movies and computer
                      files. Both are circular in shape.

                                                                                To use a pen drive, you need
                             A DVD can store about 7 times                     to plug it into the USB port on
                             more data than a CD.                                the CPU cabinet or laptop.

                                        If your computer could open a secret door to show you how it thinks, what
                                        do you imagine you would discover inside? Would it look like busy little
                                        robots, glowing tunnels of light or something else entirely?

                       TECH
                          T         Process: Steps a computer follows to convert input into meaningful output.
                          E
                         R          Output: Final result produced by a computer after it processes the given
                         M          input.
                          S
                                    Hardware: Physical parts of a computer or device.

                      REWIND RUN

                      «   The Input, Process and Output (IPO) cycle describes how computers perform tasks.

                      «   Input is the set of instructions or data provided to a computer to perform a task.
                      «   Output is the result produced by the computer after processing the input.

                      «   Input devices such as the keyboard, mouse, microphone, scanner, joystick and barcode
                         reader are hardware devices that tell the computer what to do.

                      «   The CPU is the processing device, which is located inside the CPU box or cabinet.
                      «   Hybrid devices such as touchscreens, headphones, web cameras, are devices which
                         can both send and receive information.

                      «   Storage devices such as a hard disk drive, pen drive and CD/DVD save your work so
                         you can use it later.

                      26      CodePilot (V5.0)-II

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