Squid vs. Calamari - Same or Different?

Let's be honest, who doesn't love calamari? If you haven't tried it you obviously should, its delicious. As most of my dear foodies know, calamari is squid. However, is a squid necessarily calamari?

This question was brought up over dinner this past weekend so I did a little research. Basically calamari is the name of particular types of squid, however, the term is widely used to describe the rings of squid that can be prepared using any species of the squid family.