They're everywhere. Look around you - go on, do it now. How many machines do you see?
I happened across an interesting article by Don Norman, a kind of machine design guru, where he decides that machines are clearly from outer space. And on a mission.
It's a fun read, but with lots of very serious (and quite geeky to be honest) things to say. Check it out:
And remember next time a machine plays tricks on you...