What's the difference between REST & RESTful

Question

What\'s the difference between a REST system and a system that is RESTful?

From a few things I\'ve read most so called REST services are actually RESTful services. S

Answer 1

Think of REST as an architectural "class" while RESTful is the well known "instance" of that class.

Please mind the ""; we are not dealing with "real" programming objects here.