On the power pack!
I don't really care about the signature. This was originally meant as a joke in the "signed books" forum, but I moved it out of there. I really bought the picture, of course (who wouldn't?) but I just think it's funny. I'll probably hang it up behind my desk in an elaborate frame to highlight its greatness. I could only wish it was forged by B-9, the Class M-3 General Utility Non-Theorizing Environmental Control Robot (or robut, as the Robinson father would say).