(Chapter 21 of "Our Father's Plan", by Fr. William Most, published by Christendom College Press.)

API designers, please note the following rules before calling your creation a REST API:

Update or Link images for quick format conversion

"Inversion of Control is a key part of what makes a framework different to a library. A library is essentially a set of functions that you can call, these days usually organized into classes. Each call does some work and returns control to the client."