Bibsys is a supplier of library and information systems for all the Norwegian university and college libraries, the National Library of Norway and a number of research libraries and institutions.  Bibsys is formally organized as a unit at the Norwegian University of Science and Technology (NTNU), located in Trondheim, Norway. The board of directors is appinted by Norwegian Ministry of Education and Research.
Bibsys offers researchers, students and others an easy access to library resources by providing a variety of search possibilities as well as simple loan and order functions. Bibsys delivers a range of integrated products for the internal operation of research and special libraries, as well as providing easy access to the libraries’ collections, whether they are electronic or paper documents. Their products and services are developed in cooperation with the institutions.
Bibsys began in 1972 as a collaborative project between the Royal Norwegian Society of Sciences and Letters Library (Det Kongelige Norske Videnskabers Selskabs Bibliotek), the Norwegian Institute of Technology Library and the Computer Centre at the Norwegian Institute of Technology. The purpose of the project was to automate internal library routines. Since 1972 Bibsys has evolved from a library system supplier for two libraries in Trondheim, to developing and operating a national library system for Norwegian research and special libraries. The target group has also expanded to include the customers of research and special libraries, by providing them easy access to library resources.
Bibsys is a public administrative agency answerable to the Ministry of Education and Research, and administratively organised as a unit at NTNU. In addition to Bibsys Library System, the product portfolio consists of Bibsys Ask, Bibsys Brage, Bibsys Galleri and Bibsys Tyr. All operation of applications and databases is performed centrally by Bibsys. Bibsys can also offer a range of services, both in connection with their products and separate services independent of the products they supply.
- Language institute asks hackers to help (archived) in Aftenposten, 7 June 2002 "The Ivar Aasen Center is a member of Bibsys, which is a library data center offering services to all Norwegian University Libraries, the National Library, all college libraries, and a number of research libraries."
- Kulturell kampanjejournalistikk in Aftenposten 4 March 2009 "Et enkelt søk i Bibsys (et elektronisk biblioteksystem for hele landet, red.anm.)"
- Pilotprosjekt i det stille in Aftenposten 25 June 2009 "eller du kan låne den fra nærmeste bibliotek gjennom Bibsys."