CEVAP:

National Catalog. Many countries have their own national catalogs which list all the publications available in the country An example for Turkey is TO-KAT (Ulusal Toplu Katalog - National Union Catalog). It is a database that includes all the recorded details of all the books that are available in the libraries in Turkey. The website of TO-KAT is available at http://www.toplukatalog.gov.tr. Another national catalog for Public Libraries in Turkey is KOHA which is an open source library system that is used worldwide. KOHA is used in Turkey as an automation system that unifies all the libraries that are linked to the General Directorate of Libraries and Publications of Ministry of Culture and Tourism. It is available at (http://koha.ekutuphane.gov.tr).