Xbox is a video gaming brand created and owned by Microsoft. It represents a series of video game consoles developed by Microsoft, with three consoles released in the sixth, seventh, and eighth generations, respectively. The brand also represents applications (games), streaming services, an online service by the name of Xbox Live, and the development arm by the name of Xbox Game Studios. The brand was first introduced in the United States in November 2001, with the launch of the original Xbox console.
The original device was the first video game console offered by an American company after the Atari Jaguar stopped sales in 1996. It reached over 24 million units sold as of May 2006. Microsoft's second console, the Xbox 360, was released in 2005 and has sold 84 million units as of June 2014. The Xbox One has been released in 21 markets in total, with a Chinese release in September 2014. The head of Xbox is Phil Spencer, who succeeded former head Marc Whitten in late-March 2014.