KVK: The Karlsruher Virtuelle Katalog (Karlsruhe Virtual Catalog) allows for parallel searches in several catalogs at once, for example in bookstore directories as well. Currently, it can direct you to approximately 100 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.

SULB: Medicine Faculty, Homburg: the Medicine Faculty at the university and state library of Saarland, located in Homburg, can generally provide loans to any individual. The library offers an excellent selection of electronic resources.

LIVIVO: The ZB MED search portal for life sciences offers access to a wide range of specialist information. The search results can usually be accessed online or can be ordered directly.

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.

ViFa Bio: the Virtuelle Fachbibliothek Biologie (Virtual Specialist Library for Biology) offers access to databases, online journals, and other selected specialist sources.

PubPharm: contains over 40 million publications (magazine articles, books, eBooks, dissertations) that deal with the subject of pharmacy. It also includes the Medline database, which contributes 26 million publications to the PubPharm resources.

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

Openbooks des Rheinwerks Verlags : a selection of approximately 30 up-to-date specialist IT books in German published by Rheinwerk Verlag, which can be viewed and downloaded free of charge.

O'Reilly OpenBooks: a selection of approximately 40 up-to-date specialist IT books in English published by O’Reilly, which can be viewed and downloaded free of Charge.

DBIS: A cooperative project for the usage of scientific online and CD-ROM databases. Campus wide free access to specialized databases licensed by the university library and 4,500 free online databases.

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.

Handbuch Internet-Recherche: the focus of this German-language online guide for internet research is on searching for academic information.

Suchdienste-Kompass: the Suchdienste-Kompass (Search Services Finder) of the Bielefeld University Library explains in a user-friendly way how to achieve your internet search goals quickly.

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.