Sony Interactive Entertainment (abbreviated as SIE and formerly known as Sony Computer Entertainment (SCE) and Sony Network Entertainment) is a multinational video game company and is a wholly owned subsidiary and part of the Consumer Products and Services Group of Sony.
The company was founded and established on November 16, 1993, as Sony Computer Entertainment, to handle Sony's venture into video game development with its PlayStation brand. Since the successful launch of the original PlayStation console in 1994, the company has since been developing the PlayStation lineup of home video game consoles and accessories.
Sony Interactive Entertainment handles the research and development, production, and sales of both hardware and software for the PlayStation video game systems. Alongside, it is also a developer and publisher of video game titles and is composed of several subsidiaries of Sony's largest markets: North America, Europe and Asia. As of September 2016, the company has sold more than 486 million PlayStation consoles overall worldwide.
(Source: Wikipedia)