Seems there is an alternative history where Stallman went with APL and not lisp: https://en.wikipedia.org/wiki/APL_(programming_language)#GNU_APL https://en.wi

Seems there is an alternative history where Stallman went with APL and not lisp: https://en.wikipedia.org/wiki/APL_(programming_language)#GNU_APL https://en.wikipedia.org/wiki/APL_(programming_language)#GNU... > (...) Richard Stallman, founder of the GNU Project, was an early adopter of APL, using it to write a text editor as a high school student in the summer of 1969. And: Rho, rho, rho of X Always equals 1 Rho is dimension, rho rho rank. APL is fun! Richard M. Stallman, 1969 https://www.gnu.org/software/apl/ https://www.gnu.org/software/apl/ But: > GNU APL was written and is being maintained by Jürgen Sauermann. and I believe it's fairly young when compared to emacs/emacs lisp.