The document provides a timeline of developments in augmented reality from 1968 to 2012. Some of the key developments include Ivan Sutherland's early 3D display work in 1968, Philip Milgram's taxonomy of augmented reality in 1994, Steve Feiner's MARS system in 1993, Bruce Thomas' AR Quake demo in 2000, and recent mobile augmented reality applications like Layar in 2009 and Wikitude in 2008.