Libraries in 21st century will be increasingly user centered information centers. There will be a need to enhance not only user services but also the house keeping services jobs. This book is designed and prepared, within the parameters of needs of future library services for the users. It explores scope for libraries to adopt the new and emerging information technologies. The book covers topic of new publishing trends, cloud computing, digital preservation, application of artificial intelligence, information gateway, e-books etc. The implied objective of the book is to inform about the present status of the libraries and draw the picture of future libraries."