This book is a collaborative work of B.Ed. trainee teachers studying at Arunachal University of Studies, Namsai. The purpose of this book is to provide information about the world of Information Communication and Technology (ICT). ICT has become an integral part of our daily lives and its importance is only growing. Whether you are a student, a professional, or just someone who is just curious about technology. This book is designed to give you a comprehensive overview of the subject. In this book, we will explore different aspects of ICT prevalent in today's world.