UAC

The Union Aerospace Corporation (UAC) is a fictional corporation used prominently in the Doom game series.

It is a military-industrial conglomerate that operates the radioactive waste facilities on Mars, as well as on its two moons Phobos and Deimos where Doom takes place. The military, UAC's biggest client, used the latter two facilities to conduct experimental inter-dimensional travel through teleporters. This project grew unstable, and project "volunteers" began to suffer from a violent form of progressive insanity culminating in sudden, pyrotechnic death. The story begins when distress messages sent from the moons reach Mars, where the player is stationed.

In the Doom Bible, the organization was called UAAF (United Aerospace Armed Forces) and operated on Tei Tenga.