Windows — originally codenamed 'Interface Manager' — was announced by Bill Gates in 1983, but didn't ship until 20 November 1985. Its first incarnation was as a front end for Microsoft's command-line ...

The Windows Calculator, the one that currently ships with Microsoft Windows 10 v1809 or newer, has been open sourced under the MIT License. The C++ source code, build system, unit tests, and product ...