The Unlambda Programming Language

[David L. Nicol]

"currying" used in a fascinating context: an experimental 
language in which

http://www.eleves.ens.fr:8080/home/madore/programs/unlambda/#tut

everything is a unary function.

Multiple-argument functions are defined in such a way that
the function takes the first argument and returns a function
that takes the second.