The evolution of Xerox Star 8010 star's icons up to the final product, found at Digibarn Computer Musuem
Discovered these here
"This table helps you to draw precise freehand circles and lines. It is under development by a group in the Yasuaki Kakehi Lab at Keio University.By using a computer to control the XY position of a magnet under the surface of the table, it implements, on paper, drawing methods utilized in computer graphics." http://www.diginfo.tv/v/12-0215-r-en.php#
Found here http://prostheticknowledge.tumblr.com/
This made me kinda emotional...