Xbox was first released on November 15, 2001 in North America, February 22, 2002 in Japan, and on March 14, 2002 in Europe.
The Xbox 360 was the first home console to be released in the seventh generation of game consoles and competes against Sony's PlayStation 3 and Nintendo's Wii.
Microsoft XNA is a set of tools and technologies that includes XNA Studio, which provides versions of key production tools such as asset management, defect tracking, project automation and work lists.
The full list of backward-compatible games is maintained at Xbox.com.
Only six games were initially offered in Japan, and eagerly anticipated titles like Dead or Alive 4 were not released until several weeks after launch.
Xenos contains 48 unified shader units, which are capable of both vertex and pixel shading operations. This is in contrast to older graphics processor designs which utilize separate specialized units for these tasks.