This document provides an introduction to augmented reality (AR) and discusses how Flash can be used to create AR experiences. It begins with definitions and a brief history of AR, describing early AR technologies from 1999 onwards. It then discusses different types of AR like projection, recognition, and location-based AR. The document outlines AR statistics and trends, then discusses how Flash can be used for AR, including frameworks like FLARToolkit. It provides examples of Flash-based AR demos and concludes with tips for AR development.