and Arab exhibitions to publish and display its publications and other Saudi intellectual production, along with communications, and cooperative programs, and the exchange of information and publications with Arab and foreign bodies, reflecting the cultural and civilizational role played by the library internally and externally. Indexing The library indexes the contents of Saudi periodicals such as original or translated essays, book reviews, thesis, bibliographic works, researches submitted to symposiums and conferences and published legislations for customers service beside indexing of Saudi and non-Saudi periodicals dealing with Saudi Arabia and Arab peninsula. Collection maintenance Sterilization: To save its collection from damage due to abuse and climatic factors, the library sterilizes manuscripts, rare documents using modern tools. 1- Binding: They is a binding unit for binding published and photocopied books. Rare books maintained before binding, then gold tooled. 2- Microforms: In order to keep its collections safe, the library transfer newspapers, books, manuscripts and financial documents into microforms, this spares much space and keeps it from damage. 3- Photocopying: The library provides photocopying services for its individual, organizational customers and for its own benefits, but has no circulation system, the photocopying services take into consideration the intellectual property rights. 4- Manuscripts and documents maintenance: For the sake of safety of its collection of rare manuscripts and documents, the library has established an independent maintenance unit to keep these valuable collections. Legal Deposit One of the most library achievements is the legal deposit act that issued by the royal decree No. (M/26 on 7/9/1412 A.H.) . Since application of this act in 1414 A.H., the library started to register all what is published inside the kingdom and giving it a deposit number before publishing. Regarding the retrospective deposit of old books, the library does its best to collect rare and old books through cooperation with the authors, gifts and purchasing of the first Saudi publications that are not available in the library or bookshops, the library has collected a lot of old and rare Saudi publications which enable the library to control Saudi intellectual property. Publishing King Fahd National Library Act assures the library role in contribution and publishing of researches, studies and library and information services guides, so, the library published a lot of books, references and guides to serve its customers. To promote library and information services and the history of Saudi Arabia sources, the library issued (King Fahd National Library