The three fundamental Rules of Robotics…One, a robot may not injure a human being, or, through inaction, allow a human being to come to harm…Two…a robot must obey the orders given it by human beings except where such orders would conflict with the First Law…three, a robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

I, Robot (1950) 'Runaround'