https://thenextweb.com/dd/2019/03/06/microsoft-just-open-sourced-the-iconic-windows-calculator/

The source code to the iconic Windows Calculator app is now available to view on GitHub, and I’m ridiculously excited.

A bit strange, isn’t it, to be excited to get a poke into the grubby internals of a calculator app? But then again, can you think of a more iconic, instantly-recognizable piece of software? The Windows Calculator has been a part of every version of Windows since Windows 1.0 was released in 1985. It predates pretty much everyone on TNW’s editorial team. If you’ve ever used a computer, you’ve almost certainly used it. It’s iconic.