Microsoft Flight Simulator X (abbreviated to FSX) is a 2006 flight simulation computer game originally developed and published by Microsoft Game Studios for Microsoft Windows. It is the sequel to Microsoft Flight Simulator 2004 and the tenth and most current installment of the Microsoft Flight Simulator series, which was first released in 1982. It is built on an upgraded graphics rendering engine, showcasing DirectX 10 features and was marketed by Microsoft as the most important technological milestone in the series to date. FSX is the first version in the series to be released on DVD media.