This book talks about some of the specific issues like hardware and programming.It covers some basic topics like micro controller's architectures,VLSI,FPGAs and some general low-level computing topics. While many of the issues discussed in this book may apply to PCs, and non-embedded computers.This book remains focused on topics that apply to embedded systems only. This book has incorporated a number of smaller books, stub-books, and half-books that were previously written about this subject. The author Express his Gratitude and sincere thanks to management, All the Professors and Students of Alliance college of Engineering and Design,Alliance University who have expressed their desire of this book.The Author hopes this book will serve the purpose.