UM PCs had arcs at each side of the screen. They called it "dial keys". http://w...

		DanBC on March 15, 2014 \| parent \| context \| favorite \| on: Designing and building a keyboard UM PCs had arcs at each side of the screen. They called it "dial keys". http://www.lunchoverip.com/2006/03/say_umpc.html Sadly keyboards are often blocked by patents.