Elmqvist Multitouch (IMAGE) Purdue University Caption This composite image shows how fingers and hands are computed in a new touch-activated system that projects onto walls and other surfaces and allows people to interact with their environment and each other. Credit Purdue University image Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.