I am sad that Forth did not make the list. It showed how to make a minimal programming language that runs in a very small amount of space with just a stack. A

I am sad that Forth did not make the list. It showed how to make a minimal programming language that runs in a very small amount of space with just a stack. And did a lot to popularize RPN notation. Even if you do not write in Forth, you can still benefit from knowing the ideas. For example I could not have written my answer at https://stackoverflow.com/a/60817908/585411 https://stackoverflow.com/a/60817908/585411 if I did not know the ideas of Forth.