I love the Programmer view in the macOS calculator. Being able to type in hex, flip binary digits. I've needed it a handful of times ever, but it's nice to know

I love the Programmer view in the macOS calculator. Being able to type in hex, flip binary digits. I've needed it a handful of times ever, but it's nice to know it's there. For a long time I wanted a real one, with a bank of binary LEDs alongside a hex display. Just for fun really. I don't know if such a calculator ever existed? But that one looks like the closest.