That's because both are descended from a common ancestor. GLaDOS is designed to look like contemporary robots, and IRIS is clearly very much based on existing r

That's because both are descended from a common ancestor. GLaDOS is designed to look like contemporary robots, and IRIS is clearly very much based on existing robot designs used in manufacturing, like this one: http://upload.wikimedia.org/wikipedia/commons/8/8a/Automation_of_foundry_with_robot.jpg http://upload.wikimedia.org/wikipedia/commons/8/8a/Automatio...