My sincere thanks go to all the people who directly/indirectly taught, guided, supported, and advised me to build my personal profile.

I dedicate this book to the memory of my father, and my uncle, Hamza; both of them invested the seeds of concepts and beliefs in my brother and me, and now we are harvesting the fruits of it. I also dedicate this book to my older brother, Ramy, and my mother for their support and prayers. I would also like to thank my lovely wife, Fatema, who has given up so much of our personal life during the development of my career.