Dedication

Dedicated to my mother, Mrs. Nita Harwani, Ray Tomlinson, and Dr. V. A. Shiva Ayyadurai.My mother is next to God for me. Whatever I am today is just because of the moral values taught by her.I admire and appreciate Ray Tomlinson and Dr. V. A. Shiva Ayyadurai’s invention—Internet-based email. They have revolutionized the mode of communication. In fact, their achievement has changed the life of millions of people around the world, including me.

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