Library and Information Science (LIS) is a dynamic subject and a noble profession which has the prime objective of informing and enlightening the people in various walks of life. This book is a commemorative volume brought out on the eve of retirement of Dr. Jalaja V., Associate Professor and Head, DLIS, from the University of Calicut. Eminent LIS professionals and teachers have contributed to this volume. It is a collection of 26 scholarly articles written by well experienced practitioners in LIS and eminent teachers. The articles focus on the current developments in Library and Information Science and Information Technology. The articles are grouped into seven parts. Part I, Digital Library, contains three articles on digital library software and the practical experience in Digital Library. Part II, Web 2.0 and Information Professionals, includes five articles covering the various tools and techniques and components of Web 2.0. Part III, Library Professionals and Professional Associations, contains three articles relating to role and professional requirements of LIS professionals and professional associations. Part IV, Public Libraries, has two articles which are based on the practical experience and research study. Part V, Information Users and User Studies, contains six research papers on various information user groups and their use of a variety of information sources. Part VI, Library Provisions and Access Possibilities, with four papers, discusses various modern information sources provided in the libraries and the tools and techniques related to them. Part VII, The Open Source Philosophy, contains three informative articles relating to various open source application possibilities. The volume will prove to be a good contribution in the field of Library and Information Science and will add more information to the existing treasure of knowledge in LIS.