This book results from continued strong belief in the need for a text that focuses on social science information system in library science issues of present and future in a distinctive pattern. The increasing interest in the study of society and societary problems by thinkers has created a growing demand for social science courses in the colleges. This edition is incorporated with many suggestions from both social science and library information system side, as it focuses on the critical roles of librarians and teachers. Social Science is a vague subject to be explored and many other books by experts in library science can be used for referral along with this book. This book can facilitate new learners to acquaint with the basic knowledge of social science and library information system which can be applied in practical experience of academics and library area. Effort has been made to explain the concepts in a simple and comprehensive manner to develop a foundation for the new library professionals. This book will help in library science aspects in their practical life of library profession as it will help to understand the basic concepts of social science & library information system in terms. This book has been written for bachelors' course in library science and can be used as a reference source by post-graduate students of library and information science. It covers all the topics of social science information system in the library science curriculum according to the syllabus of major Indian universities. It is grounded with theoretical and practical aspects of social science and information system in library science education and library practice. The chapters have been sequenced to facilitate ease in reading and understanding. This textbook is divided into four units, with each unit focusing on one the major domains of essentials role of social science information system in library science.