I can do whatever to a function. I can use it as an argument. I can return it from another function. I can make a function that modifies functions.

All that w/out doing anything out of the ordinary day to day programing.

   << a -> << a a * >> >> 'SQUARE' STO

First HP engineers made RPL, then they attended Sussman and Abelson's intro to CS class. I think Sussman once said that, if RPL had anonymous functions it'd be a perfect lisp.

They were real good.

https://ocw.mit.edu/courses/6-001-structure-and-interpretati...