One of the world's largest software makers, Microsoft was founded in 1975. It is renown for Windows, the world's most popular operating system for PCs and laptops. It launched its Windows Phone smartphone OS in 2010, and its own Surface lineup of tablets in 2012. The Redmond, California based company completed its acquisition of the Nokia Devices and Services division in 2014. Xbox Game Studios, previously known as Microsoft Studios, is a subsidiary of Microsoft that publishes games. It’s known for games such as Age of Empires, Minesweeper, Solitaire, Halo, and Flight Simulator, among many others.