There are many forms and applications of AI. Many are in mainstream use today. These are mainly considered weak AI in that they are only applications of AI techniques, not computers that are taking over the world. Strong AI is the quest for artificial intelligence that matches or exceeds human intelligence. The basic idea is when we have achieved strong AI, computers will take over the world in one form or another. Perhaps we will make great pets. Artificial General Intelligence (AGI) has the same meaning.