
Resident of Howard County, Maryland, systems engineer, and amateur essayist and data scientist. Author of the book That Type of Girl: Notes on Takako Shimura's Sweet Blue Flowers. Staff writer for Okazu.
Believe it or not, I actually once used a system with an APL keyboard, oh so long ago. (I think it was an IBM 5100). It was weird -- but memorable.
P.S. Thanks for commenting!
oh that looks so good... i would love to dive into that thing 
and in apl even better xD lose myself completely for a week or two...
I think you're right, though Mathematica is also ghastly. (And in my experience way more widely used than APL.)
Ah, but Mathematica doesn't assume use of a special keyboard... P.S. Thanks for stopping by!
this was my reaction too
fibonacci sequence function in apl: fib←{⍵≤1:⍵ ⋄ (∇ ⍵-1)+∇ ⍵-2}