UAC meaning in Business ?

Doom (stylized as DooM, and later DOOM) is a video game series and media franchise created by John Carmack, John Romero, Adrian Carmack, Kevin Cloud, and Tom Hall. The series focuses on the exploits of an unnamed space marine operating under the auspices of the Union Aerospace Corporation (UAC), who fight hordes of demons and the undead.

Doom is considered one of the pioneering first-person shooter games, introducing to IBM-compatible computers features such as 3D graphics, third-dimension spatiality, networked multiplayer gameplay, and support for player-created modifications with the Doom WAD format. Since its debut in 1993, over 10 million copies of games in the Doom series have been sold; the series has spawned numerous sequels, novels, comic books, board games, and film adaptations.