The very first appearances of augmented reality happened in the late 1960s and 1970s. Ivan Sutherland is credited with creating the very first head mounted display, which was introduced at the University of Utah in 1968. 
First Head Mounted Display
In 1975 Myron Krueger creates Videoplace that allows users to interact with virtual objects for the first time.  The term augmented reality wasn’t really established until the early 1990s when the two Boeing employees Tom Caudell and David Mizell used the term to describe the extension of the range of view with work-specific information, which was done with a heads-up-display (HUD). The 1990s marked an important period for augmented reality, as several factors, such as the development of mobile computers and smartphones with more and more efficient hardware. In 1997 the first mobile augmented reality system (MARS) was developed at the Columbia University in New York. The system used GPS data to display information on a head-worn-display to show more information about the building and the campus to the person wearing it. The calculation power came from a laptop which was carried on the back.
First Mobile Augmented Reality System
After the year 2000 the amount of augmented reality application increased drastically in several industries. The first augmented reality browser for smartphones, Wikitude, was introduced in 2008. Since then the development of new augmented reality apps and games has increased, also thanks to the breakthrough of the iPhone. In 2014 wearable augmented reality makes headlines thanks to Google Glass. Since then augmented reality has spread and more and more apps are being developed.