KVK: The Karlsruher Virtuelle Katalog (Karlsruhe Virtual Catalog) allows for parallel searches in several catalogs at once, as well as in bookstore directories, for example. Currently, it can direct you to approximately 500 million books and journal titles worldwide.

HBZ: the Hochschulbibliothekszentrum (University Library Center) for the state of North Rhine-Westphalia gives you access to the state's collaborative catalog. Here, you can also access DigiBib.

arthistoricum.net: (Fachinformationsdienst Kunst, Fotografie, Design): you can research the whole subject spectrum belonging to Art History, beginning with the Early Christian era up to the present. Using the search function at arthistoricum.net, you'll have access to bibliographical information on literature from the entire collection of the Special Subject Catalogues for Art (Heidelberg University Library) and Contemporary Art (Dresden SLUB) - as well as content from the arthistoricum web pages.The search function covers books and magazines, art historical Internet sources, collection, articles and digital copies of texts as well as photographs from the Deutsche Fotothek image database (German Photographic Collection).

Baufachinformation: is the central platform for specialist publications of different publishers and institutions to all subjects of planning and building. The extensive offer for practice and research will be continually expanded and includes following publication types: specialist books, leaflets, standards, research papers, conference proceedings, academic articles of 400 journals, dissertations, legal articles, test reports, literature documentations and video conferences ...

TIB-Portal:Is the portal for specialist and research data for technical life science subjects. In the TIB Portal, you have access to more than 170 million data sets from specialist databases, publishers, and library catalogs. Researching is free of charge.

EZB: Access to more than 47,000 academic publications and e-journals, half of which are freely available in their entirety. It also contains online publications for which the Hochschule Kaiserslautern's University Library is licensed, so they are available across the whole campus. You can search for publications alphabetically or by subject.

Springer-Link: allows for online viewing of around 2,000 Springer journals. Springer primarily deals with the topics of technology, medicine, and life sciences.

Wiley Online Library: offers research possibilities under various aspects including access to abstracts and full texts of open access journals. If licenses are purchased, additional full texts can be accessed.

Directory of Open Access Journals (DOAJ): this is a directory of electronic journals which are free to access, based on the principle of open access online. Unlike with the EZB, you can search for individual articles here.

bookboon.com: The resources for students currently include over 1,000 textbooks. The collection is curated exclusively by professors with teaching duties at a recognized University.

DBIS: A cooperative project to allow use of academic online and CD-ROM databases. There is free, campus-wide access to all of the subject-specific databases for which the University Library is licensed and around 4,500 databases available for free online.

Beck-online: Extensive database of full texts on legal studies (contains legislative texts, commentaries, handbooks, journals). Additionally, Beck-online also has current judicial rulings as well as some collections of forms.

DETAIL inspiration The image and reference database DETAIL inspiration contains over 5,000 project documentations from issue 1/1961 of the journal DETAIL. Online access to the product "Detail inspiration" is provided by the National Consortium and organised by the Technical Information Library Hannover (TIB).

Nautos: Database with approx. 2,500,000 data of standards from 27 countries (e.g. ANSI, DIN, ISO), technical rules as well as German legal regulations with technical reference and valid EU directives.

Sciencedirect: Elsevier offers its journal archive in subject-specific collections. The national licence contains a total of around 1,500 titles.

Google Scholar: on Google Scholar, you can search for academic texts.

BASE (Bielefeld Academic Search Engine): is one of the world's largest search engines for online academic documents. The index spans over 100 million documents from over 4,000 sources. Some 60% of the documents included in the BASE directory are full texts available to access for free (open access). The BASE search engine is operated by the Bielefeld University Library.

Online-Fernleihe: the portal for online inter-library loans, officially known in German as "Deutscher Leihverkehr", is a cooperative establishment by libraries in the Federal Republic of Germany for sharing and providing media. It is based on the principle of reciprocity, i.e. every library contributes to and makes use of the shared stocks.