Steel, microchips and a little bit of intelligence
They were always present in almost all science fiction movies. While some of them were simple butlers there were others who had important positions. Who does not know Dalta from Star Streck or the small handless one from Starwars? The robots. Some decades ago, robots were just the product of man's fantasy, but today they are pure reality. It is amazing to see how robots became part of our lives. Industry was the first area which used the advantages of robots. Is there any other employee better than a robot? I don't think so. Robots do not need sleep, food, medicine... they can work in places no man would survive, they can do jobs with much more precision than any other man... On the whole, robots are in some circumstances the best employees.