This book explains in details about the influence of Information Technology on Academic Libraries and its services. Need of Digital Libraries and its importance in the modern electronic era, accessing of resources from the Internet, history of internet and the way of accessing resources from the internet, few examples of famous digital libraries / library databases available through online, explained about few online catalogues such as IISC (Bangalore), INFLIBNET and Kerala Agricultural University Library and Information System (KAULIS), described about the Internet Public Library and its services.