(written from a Production point of view)
The Universal Media Disc (UMD) was an optical media format exclusively seen on Sony's PlayStation Portable game system. There have been two UMD releases for the PSP: the full- length Star Trek Nemesis motion picture on 4 October 2005 and the video game Star Trek: Tactical Assault on 14 November 2006.
|Home video formats|
|Physical: Betamax • VHS • CED • LaserDisc • VHD • VCD • DVD • UMD • HD DVD • Blu-ray Disc|
|Digital: Amazon • Google • iTunes • UltraViolet • Vimeo • Xbox SmartGlass|