Hologram

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

Distant past
150 million years BC, the Kastrians had a hologram recorded to tell Eldrad aeons later that his mission to revive the race had failed. (DW: The Hand of Fear)

20th century
In 1938, with little energy left, the Eleventh Doctor used the TARDIS' voice interface, which variously took on the images of Rose Tyler, Martha Jones, and Amelia Pond. (DW: Let's Kill Hitler)

In 1969, the Eleventh Doctor showed Canton Delaware a holographic projection of a Silent. (DW: Day of the Moon)

21st century
In 2007, when Sally Sparrow inserted her DVD with the Tenth Doctor's message to her into the TARDIS console, it opened a projection of the Doctor, who announced the TARDIS was returning to his timestream. (DW: Blink)

In 2008, the Eleventh Doctor called the Atraxi back to check if Earth violated their laws, and if it was defended, which the Atraxi used through holograms. (DW: The Eleventh Hour)

A woman that John Hart killed used bombs that were designed to bond to the person who killed her. She announced this to him in a hologram recording. (TW: Kiss Kiss, Bang Bang) When he survived this encounter, John later used a hologram to announce his and Gray's return to the Torchwood Three team, after setting off explosives that injured them. (TW: Fragments)

In 2009, the Shadow Proclamation used holograms to show the 27 planets the Daleks had stolen. (DW: The Stolen Earth)

In 2010, the Claw Shansheeth had an epitaph stone declaring the Eleventh Doctor's death, which Mr Smith projected as a hologram. (SJA: Death of the Doctor)

44th century
Amy Pond, as the Ghost of Christmas Present, showed Kazran Sardick the ship she was on that was about to crash on his planet through the use of holograms. (DW: A Christmas Carol)

61st century
In 6012, the humans and Hath on Messaline used holograms to show a map of their residence. (DW: The Doctor's Daughter)

Far future
The TARDIS projected a hologram of the Ninth Doctor saying goodbye to Rose Tyler, when he thought he had no way out from the Game Station in 200,100. (DW: The Parting of the Ways)

On 5,000,000,053 New Earth, Sally Calypso was a hologram newsreader. (DW: Gridlock)

Pete's World
The Tenth Doctor projected himself as a hologram into Dårlig Ulv Stranden on Pete's World, while he said his final farewells to Rose Tyler from his own universe. (DW: Doomsday)