This book covers in detail some existent theories and innovative concepts revolving around educational technology and knowledge engineering. It explores all the important aspects of this field in the present day scenario. Educational technology refers to the practice of promoting learning and enhancing performance by implementing, managing and designing apt technological methods and resources. Knowledge engineering is a part of artificial intelligence, which falls under educational technology. It deals with developing computer systems that have abundant knowledge, reasoning ability and mechanism. Both of these fields work towards making learning more accessible. The objective of this book is to provide in-depth knowledge about the various applications and methods of these subjects. Some of the diverse topics covered in this text address the varied branches that fall under this category. This book is appropriate for students seeking detailed information in this area as well as for experts.