This document provides an introduction to an online course on artificial intelligence (AI). It discusses that the course is offered through Udacity over 4 months and is instructed by Peter Norvig and Sebastian Thrun. The summary provides an overview of the key topics that will be covered in the course, including machine learning techniques like supervised and unsupervised learning, applications of AI such as computer vision and natural language processing, and how AI is used in areas like video games, music, and intelligent personal assistants.