Prof. Satish Jain has obtained B. Sc. Degree from Agra university in first division and is a gold medal winner. He obtained his B. E. (Electronics) degree from Indian institute of science (I. I. Sc. ), Bangalore with distinction. He joined Indian Airforce as a signal officer and held different technical appointments during 21 years of service. He was specially selected by the IAF to undergo masters of engineering course in aerospace science at I. I. Sc., Bangalore and M. Tech in computer science engineering at IIT Kanpur. After taking retirement from the IAF, he set up computer science department in different organisations and educational institutes. He has authored over thirty-five books on different topics in computer science and it. --This text refers to the paperback edition.