This document provides a brief history of artificial intelligence from ancient times to modern day. It traces some of the earliest concepts and developments in logic, reasoning systems, and machine computation from Aristotle, Descartes, and others. Major milestones and inventions are highlighted, such as the first mechanical calculator by Pascal in 1642, Babbage and Lovelace's mechanical computers in the 19th century, Turing's proposal of the Turing test in the 20th century, and Deep Blue's defeat of Kasparov in 1997. The document also briefly discusses some early expert systems, neural networks, and achievements in machine learning and robotics over the decades.