We’re not sure that this is actually the world’s smallest alphanumeric keyboard like they claim, but either way the UniTap is about as small as a keyboard can get and still be functional. It works by having a grid of small dot-like keys, so rather than having each dot associated with a specific letter or number, you just press the four dots that surround the letter or number you want. Right now RL Technologies is trying to license the design of the UniTap to various PDA and cellphone manufacturers,
