Information Technology and Its Business Applications is designed to serve as a textbook for B Com students It covers those aspects of computer science and information technology IT which apply to the study of commerce subjects. It will also be equally useful for students pursuing BBA. Starting with an overview of IT and its relevance to business the book delves into number systems and representation of data in a computing system fundamentals of computers data organization and database management system data communication and computer networks Internet and Internet security. It also provides an exhaustive practical section covering several important topics. Written in a lucid style the book provides numerous examples self-explanatory figures and diagrams and chapter-end exercises.