This book in your hand is worth nothing if you donÕt read it. People around me are partly responsible for the book because they stimulated me in one or another way to put my thoughts on paper.Many engineers on the planet contributed in this book and they even donÕt know it. I have great respect for all good guys working in aviation, making the world fleet safe and keeping the aircraft in good shape. It is great to be part of it. This is a book about Avionics engineering, written by Avionics Engineer.