Artificial intelligence (AI) is the branch of computer science and technology that studies the development of machines able to simulate aspects of human intelligence.

Artificial Intelligence is a branch of computer science which aims to replicate or simulate human-style intelligence (or significant aspects of it). The term was coined by John McCarthy, who invented the LISP programming language as a natural language processing tool to aid his research in the AI field.

Also consult the Artificial Intelligence Stack Exchange site.