This book has covered the entire syllabus of INC with a detailed explanation of topics for GNM students. In this book, the complexities have been avoided to provide easy understanding to students. Diagrams, flow charts, tables, and examples are accompanied with explanations appropriately wherever required. Important points are specially marked for easy access and easy understanding. All the syllabus topics are well defined, and the writer didn’t leave any stone unturned to provide you topics in detail. Students may definitely experience wonderful learning of this subject by the book—easy and detailed explanations.