|An institution uses computer to manage information systems to produce a value of the processed manually. Library is an organization working unit for agency or institution. The library of SMA Negeri 1 Bantarbolang used library information system, thus serve as one of the planning program by the school. The author interviewed the head librarian. The result of interview that the author obtained is that information at the school library system has many difficulties in data processing. The problems included the stock of books is large of numbers, so the occurrence error in recording process of book numbers, not from their catalog of books that provide availability of a collection of classical books and personal book collection so that visitors have difficulty in finding books to be borrowed. Another difficulty is the library officer who has difficulty in serving the patrons in administrative data processing which includes borrowing and returning book, when the number of borrowers are increased at the same time. By using application, the library would expect to help the librarian of SMA Negeri 1 Bantarbolang in administrative data processing and to help students to find desired book easier.
Keyword : library information system, waterfall, client-server