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
Plot: X-Plane is a flight simulation engine series developed and published by Laminar Research since 1995. Commercial desktop versions are sold for macOS, Windows, and Linux, although Laminar Research also distributes FAA-certified versions for professional use. Wikipedia