I got one of those DASKEYBOARDs back in 2010 . . . all black without any letters, numbers or symbols on the keys.
Best thing I ever did for my typing skills. I use all my fingers and thumbs and never have to look at the keys to do so. My typing speed has increased exponentially. And it has the "feel" of using an electric typewriter. Clickety-Clack.
P.S. It also keeps other folks away from my computer. Because they haven't a clue what to do with the keyboard, they move on to someone else's.
