QWERTY Keyboard is a fully-functional USB device. And by “fully functional” we mean it is capable of typing words that can be composed with Q, W, E, R, T and Y. (WET, WRY, YET, TRY, there’s a bunch of them!)

There's more info here:

• http://rasterweb.net/raster/projects/qwerty-keyboard/

• Pete Prodoehl