Hologram

A hologram is a projected three-dimensional representation of a person or object. It is a highly advanced, experimental technology that was never widely used before the Great War.

Known holograms

 * Professor Calvert communicates with the outside world through a hologram
 * Aliens on Mothership Zeta use holograms for communication
 * There were going to be several artificial intelligence holograms in the Environmental Protection Agency in Fallout 2, but the location was cut from the final game.