The theme for Illustration Friday (21 Apr ’06) was “Robot” (suggested by Dan Santat). Robot = Artificial device to perform human tasks (see definitions from How Stuff Works and also the Wikipedia entry). I dug around my earlier works and thought this fitted the theme, although when I did this back in 1990, I was thinking more of Cybernetics (the field of control and communications in living things and machines — see this, this or this).
The sketch came quite by chance. I was attempting a sketch of my left hand & forearm. For some reason, I ended up adding cables, wires and assorted machine parts to the picture. It was like what they say about eating potato-chips: “Once you start, you can’t stop!” Heh.