ELIZA
ELIZA is an early program able to process natural language. ELIZA operated by processing users' responses to scripts. The most famous script was called DOCTOR. It was a simulation of a Rogerian psychotherapist. Eliza didn't know much about thought or emotion. However, DOCTOR sometimes provided conversation like a human. ELIZA was written at MIT by Joseph Weizenbaum between 1964 and 1966.