Light pen was discovered at MIT in 1952. The light pen is PC peripheral that is usually found in industries and is also utilized with some mobile devices.

Identification

1. A light pen looks like a usual pen but does not have any ink.

Use

2. Light pens are utilized with a touch responsive PC screen to write and make choices.

Applications

3. Light pens are frequently found with PDAs and pocket PCs. You are probable to see a light pen at a retail or grocery store, where it is utilized to sign for a credit card buy on a specialized terminal.

Misconceptions

4. Light pen itself does not shine any light or give off any light. Quite, when tip of the pen is located against screen, beams of light from screen reflect off the tip, recording pen's place and permitting a selection to be made or writing to happen.

Features

5. When light pens are utilized with PCs or credit card terminals, pen or full terminal is connected to PC with a USB cable.