Touchscreens!

How they work.....

The basics....

Touchscreens are a complex thing to add to gadgets. The software has to recognise multi touch gestures, and remember an individuals move. There are several different types off touch technology. Some rely on infrared sensors, while others use sound waves.

The Invention..........

E.A Johnson had the first ideas about touchscreen in 1965. He drew up some plans, with a photograph, but he never manufactured it for customers.
Haptic Touchscreen Technology (all about sense of touch)