Design Patterns - Elements of Reusable OO Software

I am starting on a new learning expedition into software design patterns.  I have learned that the bible of design patterns is a book called ‘Design Patterns, Elements of Reusable Object-Oriented Software’ published by Addison Wesley.  This book is used as a textbook for many Software Engineering programs. 

 Design Patterns in this book are broken down into three main categories; Creational Patterns, Structural Patterns, and Behavioral Patterns.  My goal is to study each design pattern and summarize my findings and to record any insights I may have.  Look forward to a writup on each pattern.  The first pattern in this series will be the Abstract Factory pattern.