I think I would also be interested in seeing the older source code for Calculator in Windows 3.x, 95, NT4, 2K.
Are there any particular reasons why? I think the new Calculator has a lot of interesting functionality.
I think for several reasons:
The limited resource era probably led to some interesting solutions
I changed my wording a little, though, instead of “more interested” to “also interested”
The core (numeric) code looks like it dates from this time.