Photos: World's largest touchscreen?

In Groningen, The Netherlands sits the University of Groningen's Reality Touch Theatre which at 10 meters (33 feet) wide is called the biggest touchscreen interface in the world. The touchscreen uses diffuse illumination in which a layer of material on the front of the screen is used to reflect infrared light.

The facility is being used by academics researching geographic information systems that capture, analyse and present data using techniques such as cartography, statistical analysis and database technology.

Source