A developer has adapted Microsoft Word 1.1a, originally for 16-bit x86 systems, to run natively on modern 64-bit Windows PCs through a project called “Opus.” This adaptation compiles the original source code into a genuine x64 application, avoiding the use of emulators or virtual machines. The developer translated incompatible segments of the original code, including 16-bit assembly language, into C or C++, while mapping Win16 functions to modern Win32 APIs. The project retains original resources and copyright notices, and is hosted on GitHub without a broad open-source license. Automated testing has been implemented to ensure functionality mirrors the original application. Microsoft has previously published similar historic projects, but this port is an independent effort, providing insights into early Windows software architecture.