Asimov's 30 Laws of Robotics

A must-read for any Asimov fan. Here. Three examples:

8. A robot may not act in such a fashion as would make dogs obsolete, because dogs are less expensive than robots, and robots should be reserved for science things.

10. A robot, when given contradictory orders by two human beings, and assuming those orders do not violate the First Law, must decide which order to follow based on which human being has a deeper voice.

16. A robot may take only one item from each house when trick-or-treating, unless that robot has been tasked with collecting as much candy as possible for me, Isaac Asimov, in which case that robot may ignore the First Law.

[Thanks, BoingBoing, for telling me about this.]