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Do you know?


                        In laptop, notebook and tabs, keyboard is  referred as ‘keypad’. Christopher Latham Sholes  is  the
                        inventor of keyboard.


                 Mouse

                 Mouse is a handheld pointing device that is used on a  at surface and is represented
                 by a pointer on the screen. The pointer on the screen moves when the mouse is
                 moved by the user. A mouse generally consists of two buttons and a scroll wheel
                 on its top.

                 By clicking the buttons of a mouse, the user gives instructions to the computer.
                 The mouse was invented by Douglas Engelbart.
                                   Joystick

                                   Joystick is a pointing device whose function is similar to a mouse, except that a mouse
                                   pointer stops moving on the screen as soon as the user stops moving it, while the joystick
                                   pointer continues to move in the direction towards which the joystick has been pointed.
                                   To stop the pointer, the user has to bring the joystick to its upright position. It is generally
                                   used to play video games.




                 Scanner
                 A scanner is a device that scans a document by sensing the re ection
                 that is received when the scanner emits rays on the contents. It takes
                 the image of contents and converts it into a digital file.

                 The  scanned  image or  photo can  be  stored  in a computer  and
                 easily transferred to a secondary storage device. Scanners can be
                 categorized as Handheld scanners and Flatbed scanners.


                 Optical Mark Reader (OMR)

                 OMR is an input device that can detect the marks on a paper. It is used to evaluate answer sheets in which
                 selected answers are marked in dark circles. It is used to read the given or marked answers by sensing the
                 marks made on the answer sheet.


                 Magnetic Ink Character Reader (MICR)
                 MICR is a device that is used by banks to process cheques by interpreting information
                 stored in MICR code.

                 On the cheques, the name of the bank, branch code and cheque number are printed
                 with a special kind of ink containing magnetic particles or iron oxide which is scanned
                 & read with the help of MICR and accordingly processed by the computer. A MICR
                 code consists of nine digits that identify the bank and branch.





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