Web OPAC is the integrated module of web based Online Public Access Catalog of KOHA UC TATI Library System. It provides an easy way for user to search the books in the Main Library and ‘online affiliated libraries’ all over the world through internet. In general, Web OPAC is designed to query the books online using its powerful searching tools and to present the results to user in structurally and systematically manner by listing down the details of the books including its locations. Besides, Web OPAC also provides the services for registering user to check their personal account in library and also is able to reserve the books online through Web OPAC.