E-Learning or electronic learning refers to the practice of teaching and learning using digital technology and multimedia. E-Learning technologies use flash and PowerPoint software to develop interactive content and database and Content Management Systems (CMS) to store user information. Effective presentation of the subject matter as well as the addition of relevant data can lead to better learning. E-Learning can be practiced in the classroom or through distance learning. Different approaches, evaluations, methodologies and advanced studies on E-Learning have been included in this book. It will serve as a valuable source of reference for graduate and post graduate students.