Another good example of how languages were already progressing during the 1960's.

This is where list comprehensions came from! Like we have in modern Python, Haskell and more. SETL was the first language to use comprehensions in its core syntax.

Doing Advent of Code 2025 in SETL this year.

isetl was what we used for my discrete math course 20 years ago or so. I remember other students complaining about having to learn it. "when are we going to use this language".