This book covers introductory concepts of Information Technology. It broadly covers the topics regarding components of computer system, computer networks and the distinctions between the different hardwares and softwares. Role and importance of database management system is also discussed. While accessing the internet, the intermediate devices for data transfer are analyzed for proper understanding. All the features of Microsoft Office (microsoft word, microsoft excel and microsoft powerpoint) are elaborated with complete details. At last, the concept of electronic commerce is explained.