This document provides an overview of artificial intelligence (AI) and its applications. It defines AI as intelligence exhibited by machines and describes artificial neural networks (ANNs) which are systems composed of interconnected processing elements that learn from experience. The document outlines different types of machine learning including supervised, unsupervised, and reinforcement learning. It then discusses many applications of AI in fields such as aviation, education, finance, healthcare, marketing, and transportation. The document concludes by describing AI Saturdays, a global community for peer-to-peer learning about AI.