ORCA/Modula-2 is a Modula-2 compiler written in the Modula-2 programming language for the Apple IIGS computer. It was developed by Peter Easdown during 1993–94 and published by The Byte Works. Whilst originally developed separately, when it was finally published, it was fully integrated with the development platform/environment called the or . At publication, the compiler was shipped with comprehensive support for the Apple IIGS's operating system (GS/OS) and toolkit. Unfortunately, due to the demise of the Apple IIGS, ORCA/Modula-2 never had much impact in the market.