The history of the OS calculator is rooted in skeumorphism to look like the pocket calculators of the 90s: https://en.wikipedia.org/wiki/Calculator https://en.w

The history of the OS calculator is rooted in skeumorphism to look like the pocket calculators of the 90s: https://en.wikipedia.org/wiki/Calculator https://en.wikipedia.org/wiki/Calculator I doubt any OS calculator got built through a modern software development process.