At some point I was quite interested in how the very first version of FORTRAN looked like, so I wrote a FizzBuzz [1] in it.

It was a very bare-bones language, felt more like a high-level assembly macro language. One thing it did well was expressing formulas with the usual "mathematical" notations (+,-,*,/, parentheses to group operations, variables). I guess this was revolutionary at the time. But the control structures were very limited, everything was basically jumps and gotos. The IF was merely a syntactic sugar for conditional jumps. Of course, functions did not exist in the language.

[1] https://mveg.es/posts/fizzbuzz-in-fortran-1/