[itishappy]

It sounds unrelated to the monads popularized by Haskell tutorials. Naming coincidence or am I missing something?

[odo1242]

Naming coincidence, they are in fact unrelated.

[solidsnack9000]

A `monad` in Category Theory (which is where Haskell gets them from, ultimately) is a single-argument functor and two natural transformations, so there probably is a through-line here in terms of one-argument function-likes.

[skruger]

APL's use of 'monad' predates Haskell's existence by decades.

[082349872349872]

...and Leibniz's "windowless monads" (all three concepts are pairwise distinct, related solely by the greek prefix for 'single') predates APL and Haskell by centuries.