For what it's worth, GNU APL is GNU because the developer chose to associate their project with GNU, not because there was any sort of effort by GNU as an organ

For what it's worth, GNU APL is GNU because the developer chose to associate their project with GNU, not because there was any sort of effort by GNU as an organization to implement APL (see also [0]). It implements what I think is a pretty outdated APL (e.g. dynamic scoping everywhere, no control structures for loops), and I'd say there are better free options now, like Kap and April, and some others listed at [1]. [0] https://en.wikipedia.org/wiki/List_of_GNU_packages#What_it_means_to_be_a_GNU_package https://en.wikipedia.org/wiki/List_of_GNU_packages#What_it_m... [1] https://aplwiki.com/wiki/List_of_open-source_array_languages https://aplwiki.com/wiki/List_of_open-source_array_languages