These books are basically the equivalent of a zoologist going out into the world of existing code bases, and trying to come up with a naming scheme for everything they find. Most of the OO patterns existed long before the Gang of Four formalised them. Many of them existed before we even had commercial OO languages. And I'm certain most of the patterns in this book have been used (where suitable) by web developers for a long time now. It can be useful to have some terms defined, but in the end you either hav