Hologram

Holograms were three-dimensional light images used for information storage and communication.

Races and individuals with access to holographic technology included:
 * The Doctor (DWM: Flashback, DW: The Parting of the Ways, Blink)
 * Veltrochni (MA: The Dark Path)
 * Kastrians (DW: The Hand of Fear)
 * Magnus Greel (DW: The Talons of Weng-Chiang)
 * Argolins (DW: The Leisure Hive)
 * Betrushians (NA: St Anthony's Fire)
 * The Walker Expedition (DW: The Impossible Planet / The Satan Pit)
 * The inhabitants of New Earth (DW: Gridlock)
 * The inhabitants of Messaline (DW: The Doctor's Daughter)
 * The Shadow Proclamation (DW: The Stolen Earth)
 * The Time Agency (TW: Kiss Kiss, Bang Bang, Fragments)
 * Sontarans (DW: The Sontaran Stratagem,The Poison Sky)