Blu-ray Disc (BD or Blu-ray) is a high-definition home entertainment format on the standard 120mm optical discs. Launched in 2006, it competed briefly, but fiercely from 2006 to 2008 with HD DVD before becoming the standardized high-definition home entertainment format.
Blu-ray releases, much like DVDs are divided into separate regions, to restrict the areas specific discs can be played. The following is a guide to the regions and which areas of the world they relate to:
"Region free" releases.
East Asia (except Mainland China and Mongolia), Southeast Asia, the Americas and their dependencies.
Africa, Southwest Asia, Europe (except Russia), Oceania and their dependencies.
Central Asia, East Asia (Mainland China and Mongolia only), South Asia, central Eurasia and their dependencies.
Star Trek: The Next Generation - Season 3, The Best of Both Worlds, Star Trek: The Motion Picture, Star Trek III: The Search for Spock, Star Trek V: The Final Frontier, Star Trek Generations, Star Trek: Insurrection, Star Trek Nemesis