Plot: Microsoft Flight Simulator 2004: A Century of Flight is a flight simulation video game released in 2003, and is part of the Microsoft Flight Simulator video game series. It is the last version to support Windows 98/9x series of operating systems. Wikipedia
Plot: Microsoft Flight Simulator is a series of amateur flight simulator programs for Microsoft Windows operating systems, and earlier for MS-DOS and Classic Mac OS. It is one of the longest-running, best-known, and most comprehensive home flight simulator programs on the market. Wikipedia