For indeed, with hardship [will be] ease. [94:5]

This book is dedicated to my parents, who taught me how to write and communicate better!

To my lovely wife. Without her tireless support in different adventures (in UK, Italy, Qatar and Pakistan), I would not have been able to make it!

I would like to thank Dr. Ahmed Elmagarmid (Executive Director of Qatar Computing & Research Institute, Hamad Bin Khalifa University), whose vision inspired me all the way while writing this book.

I would like to extend my special thanks to everyone, including my family (brothers and sister), and friends (Muhammad Imran and Abid) who motivated and helped me achieve this, director, Marco Li Vigni, in Italy whose technical advice and ready support has always been guidance and of greatest value for me.

I would like to thank the reviewers of this book for their feedback and pointing me to the right direction. A special thanks to Mamata Walkar the Content Editor of the book, Divya Poojari, Technical Editor Mohita Vyas, and Shaon Basu for getting this effort completed.