For many years professional psychologists have written books about our personal mental make up. Unfortunately , and almost without exception , these works use vocabulary outside of a understanding of the average person and as a result are incomprehensible to him. We would all like to understand the structure and contents of our mind better and this book is written for them. The book is written using simple English using everyday vocabulary, augmented by IT terminology, the only language common to the whole world. This book will also enable you to understand the building blocks of your minds structure and why you think as you do , why there are apparent conflicts in your belief system, why you behave in a certain manner, how you perceive yourself, and how others perceive you. It also examines your own character and personality and explains why you are what you are. This book further explores how we speak, how we remember things, and how we interface with our five senses and with external media such as books and electronic information systems. It also explores our belief systems, why they change as we mature, and why they contain apparent dichotomies. By reading this book, you will fully understand how and why your mind functions and enable you to understand the character and behavior of others. This will enable the reader to fully understand why others say and do , as they do.