http://mblog.lib.umich.edu/~rdivecha/archives/2006/02/the_world_of_sm.html This is a fun video based on some research some people have done with touchscreens that can sense multiple points of input.
http://mblog.lib.umich.edu/~rdivecha/archives/2006/02/the_world_of_sm.html This is a fun video based on some research some people have done with touchscreens that can sense multiple points of input.