Monday, 6 May 2013

What are computer input devices?Explain its different types with examples


By on 03:28

You may also like:-What are computer output devices?Explain its different types with examples.

Input devices are those devices which takes input from user's in the simple form and convert the data/information into digital form i.e. 1 or 0.

Input device categorisation:-

1)Online input devices/Direct line entry devices:-On line input devices are those devices which are directly connected to computer example keyboard,mouse etc.

2)Offline input devices/Source entry devices:-Offline input devices are those devices which are not directly connected to computer example scanning device.

Types of common input devices:-

1)Keyboard:-Keyboard is a well known input device which contains alphabets,numeric/digits,special keys,function keys etc.Keyboard can be of serial or parallel.




Alphabets:-A to Z,a to z.

Numeric key:-0 to 9

Special keys:-shift,spacebar,ctr,alt etc.

Functions key:-F1,F2.....F12.

Keyboard is used to convert these above mention keys into digital form of computer.

2)Mouse:-Mouse is an input device which is also called a pointing device.It is used to move the cursor on the screen.Mouse works in GUI(Graphical User Interface) mode.Mouse are of different-2 types in which some are physical mouse,optical mouse,cordless mouse.




3)Joystick:-It is also called as game controller device.Joystick is a remote control device which is used in gaming purpose.We will also play game with keyboard but joystick gives more simplicity and more speed than keyboard.

4)Scanner:-Scanner is a example of input device which are mainly used to check OMR sheets.It is also used to copy text,images in the form of soft copy.




5)Bar Code Reader(BCR):-Bar Code Reader is generally used in shopping malls,BCR read the bar code and display the rate of item on the computer screen.It is also used to recognised courier products.BCR takes input in the form of code and convert this bar code into computer language(0 or 1).




Some other input devices are Light pen,track ball,MICR,web camera,touch screen,microphones etc.


If you have any query then leave your comments and don't forgot to follow me on Google+,Facebook,Twitter.

15 comments:

  1. A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones. Additionally, nearly all barcode readers contain decoder circuitry analyzing the barcode's image data provided by the sensor and sending the barcode's content to the scanner's output port.

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  2. Alok Sharma, You have very nice info here on Different Types of Input Devices
    Thanks, keep it up! dear.

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  3. thanks "Mahmood Alam " and "Andy Adams "

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  4. We need more about input devices....

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  5. We need more about input devices....

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  6. This comment has been removed by the author.

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  7. This comment has been removed by the author.

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  8. here is much more about input devices http://www.apnapedia.com/computer-input-devices/

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  9. Thanks very much very intersted answ

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