The ultimate way to be cool, geek and to improve your mathematics skills. The current time is displayed in vertical columns, one digit per column. A column has four dots/lights/thingies, meaning the powers of 2 (2^0 = 1, 2^1 = 2, 2^2 = 4, 2^3 = 8), actually the digits of the according digit of the current time in binary. When a dot lights, then that digit of the binary number is one, if it does not, it's zero. It may sound complicated but it takes only a little practice to be able to read it as fast as you read a "normal" clock. Aviable as a Gnome applet, Windows software, or you can order it in parts or assembled as a desktop or wall clock. Unfortunately, no wrist-watch version (dumb, geek way to amaze girls) is known to exist.