A hologram was a projected three-dimensional representation of a person or object, normally used in communication or entertainment.
Holograms were used mostly in telecommunications as an alternative to screens. A holocamera of any recorder or receiver would acquire the dimensions, form and movements of an object by means of ray scanning. This vision then could be transmitted simultaneously somewhere else, or stored and reproduced on a holoprojector at a later time. Projected holographic images were visible from all sides, although matterless. Holograms were initially monochrome with a cyan hue, though following the Clone Wars, an additional layer of color was added to some holograms. In full duplex telecommunications, users could see each other's holograms, as if they were in the same room talking to each other, although not always in relative proportion.