Alan Kay presenting Ivan Sutherland's Sketchpad, one of most influencial programs in the history of graphical user interfaces. Sutherland developed Sketchpad in 1963. This video was extracted taken from a longer one in http://www.archive.o rg/details/AlanKeyD1 987
![Ivan Sutherland\](http://img.youtube.com/vi/mOZqRJzE8xg/2.jpg "Ivan Sutherland\")
