From the – New York Times
A digital pen. The device looks like a slightly plump ballpoint, and works like any ballpoint. But inside this gadget are a tiny camera and an optical sensor that record the pen’s motions as you write, and a microprocessor that digitizes the words, sketches and diagrams that the optics detect.
Read the whole article at the link above. This might be a really great device for adding to digital dental charts.