Windows Media Center was earlier shipped as its own operating system—the Windows XP Media Center Edition. It is now also bundled along with Windows Vista Ultimate Edition. The program is primarily meant as a home entertainment hub, wherein the interface is either a large monitor or an LCD/plasma television. The interface is meant to be used from a distance of about 10 feet, and thus features large and colourful icons instead of a traditional menu layout. Windows Media Center is capable of organising and cataloguing several media pieces on your computer—from TV shows to movies to photographs; it can also record TV shows at specified time intervals and acts as a PVR if supported with the right hardware. To record TV, it requires a TV-Tuner card, either analogue or digital. Flash memory (NVRAM) and part regular hard disk. Such H-HDDs, as they are called, should soon become regular features of our computer systems. Typically, H-HDDs include between 50 MB and 512 MB of Flash memory. Much like ReadyBoost, Windows Vista will make use of this Flash capacity to store frequently used data as cache. Vista can, for example store boot data to the cache when the system shuts down or hibernates. This should allow faster restarting or resuming, respectively. The cache can also be used as a scratchpad for data reads and writes even when the hard drive has spun down—this should reduce the power consumed by the disk under normal usage; once again a plus point for laptop owners. Recorded shows can either be burnt onto disc or transferred to a portable media player. There are several geographical restrictions on this software— particularly—Windows Media Center can play HD video in all countries, but does not support HDTV in any country except the United States. Additionally, there is no support for HD-DVD or Bluray movies in any country. While HDTV sets are not supported, media managed through Media Center can be relayed to any standard TV set via Media Extenders or via the Xbox 360 game console. (A Media Extender such as the Xbox 360 game console allows you to stream your music, movies, and photographs to a television set.) Media cannot be transferred to another computer, however (for this you can always use Windows Media Player 11, assuming all computers have Vista installed).