The chapters of this book are collected mainly from the best selected papers that have been published in the 4th International conference on Information Technology ICIT 2009, that has been held in Al-Zaytoonah University/Jordan in the period 3-5/6/2009. The other chapters have been collected as related works to the book’s topics. “Heuristics are criteria, methods, or principles for deciding which among several alternative courses of action promises to be the most effective in order to achieve some goal - Pearl 1984.
