Input and Output Devices
By Tencho Sherpa
Welcome!
Input Devices
Bar Code Reader
It is a device which is used to read the code from the products which are usually in the form of Bars. It has a light sensitive detector which tells the cashier the values of the bars on the product & changes them into numeric code. These Bar Code Readers are mainly used in shopping malls
Light Pen
It is a pointing device which contains a photocell mounted at it's tip. It senses the light from the screen when it becomes closer to the screen, & generates a pulse. So for identifying a particular location on the screen these light pens are very useful. But these days, not much is in use.
Scanner
The scanner is an input device like the photocopier machine which makes the electronic copy of the picture or document which can be further edited.
McDonald's Keyboard
Output Devices
Plotters
A plotter can be used to make high quality, accurate, A3 size or bigger drawings.