The "Great FP Terminology Barrier"
"Things that can be mapped over shall be called...Functor"
Combinator: "A style of organizing libraries centered around the idea of combininig things".Like Unix command pipeline ps aux | grep root | wc -l
High-Order-Function: A function that takes other functions as parameters or whose result is a function.
lambda: Annonymous function.
from >>'Functional Programming simplified'.