MathSciNet is a comprehensive database covering the world's mathematical literature since 1940. It provides Web access to reviews, abstracts and bibliographic information from Mathematical Review and Current Mathematical Publications. The database contains information on over 4 million articles and books, with direct links to over 2.7 million articles in over 1,800 journals.

The database OLC Ibero-America, Spain and Portugal is a regional related section from the Online Contents database that is constantly being completed with the addition of selected journals from the competent Libraries, the Library of the Ibero-American Institute Prussian Cultural Heritage (Ibero-America and the Caribbean) and the state and university library SUB Hamburg (Spain and Portugal). Currently more than 1.400 journals are being indexed. Gradually earlier editions of these journals will also be made accessible.

The multidisciplinary database OLC International Relations and Area Studies contains table of contents of journals from several special subject collections, including political science, economics, the Middle East and other regional special subject collections. It offers a multidisciplinary selection from the Online Contents database, with additional input from other special subject collections. The International Relations and Area Studies section currently covers approximately 797 journals.

Online Contents Law is a subject-based selection of bibliographic data from the database Online Contents. The improvement of the Online Contents Law database is supported by the Deutsche Forschungsgemeinschaft (German Research Foundation) - from 2006 - within Internet portal Virtuelle Fachbibliothek Recht (Virtual Library Law). The further development of the database is coordinated by the Sondersammelgebiet Rechtswissenschaft (Special Collection Law) of the Staatsbibliothek zu Berlin - Preußischer Kulturbesitz (Berlin State Library - Prussian Cultural Heritage). 88 journals cover the ibero-american law and are part of the Online Contents - SSG Ibero-America.

The database OLC Mathematics and Informatics is a subject oriented selection of bibliographic data from the Online Contents database that is regularly enhanced by table of contents data from additional periodicals out of the special collections of the TIB Hannover. Currently 1,357 journals are being indexed back to the year of publication in 1993.

The Online Contents service of the Special Subject Collection Political Science and Peace Research is part of the Online Contents database. It offers access to tables of contents of more than 870 journals relevant for study and research. New journals were added until December 2013 by the Special Subject Collection. Thus the database contains approximately 1.478,600 records of journal articles and reviews.

SSOAR collects electronic full texts from the domain of the Social Sciences and makes these texts available according to the Berlin Declaration on Open Access to Scientific Knowledge.

References within the fields of business, economics, credit management and ergonomics are searchable via a single interface. An overview of included resources is available via https://www.wiso-net.de/sourceInformation/categoryNavigation?searchId=%3A3%3AWIR....

German-language literature and research projects in the field of social sciences as well as the database World Affairs Online with literature on international relations. An overview of included resources is available via https://www.wiso-net.de/sourceInformation/categoryNavigation?searchId=%3A3%3ASOZ....

zbMATH Open (formerly known as Zentralblatt MATH) is the world's most complete and longest running abstracting and reviewing service in pure and applied mathematics. The MATH Database contains several million entries drawn from more than 3,500 serials and journals, and more than 1,100 book series and monographs. The entries are classified according to the Mathematics Subject Classification Scheme (MSC 2000).