First of all, I am grateful to my mom, Safia, and dad, Abdelaziz, for the love and education that they generously provided me with. Thanks to Spectrum ZX, which we had back in the 80s. I grew as addicted to computers as I am right now, and this was the start of everything.

I would also like to thank my in-laws, aunt Zohra and uncle Hammadi, who always supported me and had blind and unconditional faith in the work I did. They really wanted to see this book published.

I am very thankful to my editors Tushar Gupta, Vivek Pala, and Natasha Dsouza; and reviewers, Vitomir Kovanovic and Multabh Mayank, for the valuable advice and professional guidance that they provided to accomplish this book.

I would especially like to thank my friends Anas Zdadou and Sahbi Chakroun and my family: Tselma, Soussou, Dah, Hafedh, Zazza, and Idriss. I owe so much to you all.

However, most of all, I am extremely grateful to my super wife, Khawla, who patiently had to suffer my absence while I wrote this book. During this period, she always kept her smile on and never complained. I can say that this book would probably never have been possible if she hadn't been there all along with our little Fatma Ezzahra, casting a light to help brighten my hard journey toward achievement and success.