APL has a long an interesting history. It was successfully used for decades in Wall Street firms.
It's also worth looking at
* The A+ programming language, an APL derivative created at Morgan Stanley by Arthur Whitney. https://en.wikipedia.org/wiki/A%2B_(programming_language).
Roger Hui also worked there for a number of year.s
* The J language from Roger Hui - https://en.wikipedia.org/wiki/Roger_Hui#J_language
* Arthur Whitney and Kx Systems - https://en.wikipedia.org/wiki/Arthur_Whitney_(computer_scien...