If you have a cat that likes to tread the keyboard you might want to look into PawSense

...a software utility that helps protect your computer from cats. It quickly detects and blocks cat typing, and also helps train your cat to stay off the computer keyboard.

But what if your cat was typing the following which recently came to my attention?

"Meowl" by Allen Ginsberg's Cat

I saw the best kittens of my litter abandoned by humans,
feral delirious rabid,
propelling themselves through the calico weeds in over-
grown railyards, searching for a catnip hit,
silverwhiskered hipcats purring in blissful herbal intoxi-
cation leaping to bat the hard white moon-ball
bouncing in the black-top sky...