Google Glass is a type of wearable technology with an optical head-mounted display (OHMD). It was developed byGoogle^[9] with the mission of producing a mass-market ubiquitous computer.^[1] Google Glass displays information in asmartphone-like hands-free format.^[10] Wearers communicate with the Internet via natural language voice commands.^[11][12] Google started selling a prototype of Google Glass to qualified "Glass Explorers" in the US on April 15, 2013, for a limited period for $1,500, before it became available to the public on May 15, 2014,^[13] for the same price.

On January 15, 2015, Google announced that it would stop producing the Google Glass prototype but remained committed to the development of the product. In its eyes, Project Glass was ready to "graduate" from Google Labs, the experimental phase of the project.^[14]