O'Reilly is an electronic reference library by providing access to technical content from leading publishers, including books, videos, proven learning paths, case studies, interactive tutorials and audio books. The learning platform gives access to the latest titles from O'Reilly and from Pearson's collection of imprints which include: Addison-Wesley Professional, Adobe Press, Cisco Press, Macromedia Press, New Riders, Peachpit Press, Prentice Hall PTR, Sun Microsystems Press, Que, and Sams. Microsoft Press titles are also available in O'Reilly.

The OAPEN Library contains freely accessible academic books, mainly in the area of Humanities and Social Sciences. OAPEN works with publishers to build a quality controlled collection of Open Access books, and provides services for publishers, libraries and research funders in the areas of dissemination, quality assurance and digital preservation. OAPEN serves as delivery platform for various open access initiatives, including Knowledge Unlatched.

OECD iLibrary is the online library of the Organisation for Economic Cooperation and Development (OECD) featuring its books, papers and statistics and is the gateway to OECD’s analysis and data. It also contains content published by the International Energy Agency (IEA), the Nuclear Energy Agency (NEA), the OECD Development Centre, PISA (Programme for International Student Assessment), and the International Transport Forum (ITF).

Oxford Handbooks Online in Law brings together the world's leading scholars to write review essays that evaluate the current thinking on a field or topic, and make an original argument about the future direction of the debate. Monthly updates introduce articles in advance of print publication and beyond the book, online-only content ensures the most current, authoritative coverage anywhere. We have purchased the collections Foundation (titles before 2012) as well as the collections 2012-2018 of the subject “Law”.

Founded in 1916, Optica (formerly the Optical Society of America, OSA) was organized to increase and diffuse the knowledge of optics, pure and applied. One of the Society's major activities is the publication of peer-reviewed journals, books, conference proceedings and co-publications.

Oxford Art Online offers access to a collection of authoritative, comprehensive and easily searchable online art resources, including "Grove Art Online", "The Concise Oxford Dictionary of Art Terms", "Encyclopedia of Aesthetics" and "The Oxford Companion to Western Art". Grove Art Online contains "The Dictionary of Art", edited by Jane Turner (1996, 34 vols), and thus provides web access to the entire text of the dictionary with quarterly additions of new material and updates to the text, plus extensive image links.

These popular and reliable resources from Oxford provide expert recommendations on grammar, spelling, and usage; essential guides to the written word; and specialist dictionaries for writers, editors, proofreaders, and other professionals. Premium resources * New Hart’s Rules: The Oxford Style Guide * Garner’s Dictionary of Legal Usage * New Oxford Dictionary for Writers & Editors * Pocket Fowler’s Modern English Usage

The Oxford English Dictionary is a guide to the meaning, history, and pronunciation of over half a million words and phrases, both present and past, from across the English-speaking world. It traces the usage of words through 3.5 million quotations from a wide range of international English language sources, from classic literature and specialist periodicals to film scripts, song lyrics and social media posts.

Oxford Scholarly Authorities on International Law (OSAIL) contains over 180 full-text online editions of market-leading reference works and treatises published by Oxford University Press, including Oppenheim, and the Oxford Commentaries on International Law.

Including Oxford Scholarship Online (OSO), the University Press Scholarship Online (UPSO) publishes new books every month from an ever-growing roster of contributing presses, each adding to the variety of subjects covered on the platform. The MPG purchased the volumes 2003-2013/2014 of 16 OSO subject collections. This selection is continuously extended by single e-book acquisitions by MPG libraries.

The Miras Maktoob collection of Persian e-books consists of 249 volumes (189 works) originally published by the Written Heritage Research Institute (Miras Maktoob), a non-governmental organization in Tehran. These e-books contain both Persian and Arabic works on Islamic history and culture in the broadest sense.

Project Gutenberg is a volunteer effort to digitize and archive cultural works. Founded in 1971 by Michael Hart, it is the oldest digital library. Project Gutenberg's mission is "To encourage the creation and distribution of eBooks".

Featuring exclusive contributions by prominent political leaders, policymakers, scholars, business leaders, and civic activists from more than 100 countries, Project Syndicate offers unrivaled insight into the topics commanding the world’s attention.

prometheus is a digital image archive for Art and Cultural Sciences containing approx. 360.000 images -- prometheus ist ein digitales Bildarchiv für Kunst- und Kulturwissenschaften mit ca. 360.000 Bildern

Das Projekt "Propylaeum – Virtuelle Fachbibliothek Altertumswissenschaften" ist ein Internetportal, das Fachinformationen für den gesamten Bereich der Altertumswissenschaft anbietet, derzeit für die Fächer Ägyptologie, Alte Geschichte, Klassische Archäologie, Klassische Philologie und Vor- und Frühgeschichte. --

Refubium is a service of the university library of the Freie Universität Berlin. As an institutional repository it collects documents, dissertations, postdoctoral theses, and research data.

MPG Resource Navigator is a web application to navigate through scientific information resources available to staff and guests of the Max Planck Society. It includes licensed databases, digital collections, and reference works. In addition, recommendable retrieval tools available on the web free of charge are part of the collection. Moreover, almost all Max Planck Institute library catalogs, as well as selected external ones, are accessible from here.

RILM Abstracts of Music Literature features a wealth of content from the early 1800s through the present with some content coverage extending back as far as the late 18th century. Updated monthly, the database includes coverage of relevant articles from more than 10,000 journals, many of which are not specifically devoted to music. RILM Abstracts of Music Literature also includes nearly 850,000 records with over 52,000 new records are added every year.

The RSC publishing platform provides access to electronic journals and books from the Royal Society of Chemistry. From this page, you can reach over 1 million chemical science articles and chapters. Users from the MPG have access to the entire journal collection, including the RSC journals archive covering articles published back to 1841. In addition, a collection of about 900 ebooks was purchased within the scope of the German national licenses program. The Max Planck Society also covers article-processing charges in line with the RSC "Read & Publish" agreement. Further details are available on the MPDL website.

SAGE Research Methods is the ultimate methods library with more than 1000 books, reference works, journal articles, and instructional videos by world-leading academics from across the social sciences, including the largest collection of qualitative methods books available online from any scholarly publisher. The site is designed to guide users to the content they need to learn a little or a lot about their method. The Methods Map can help those less familiar with research methods to find the best technique to use in their research. Built upon SAGE’s legacy of methods publishing, SAGE Research Methods is the essential online tool for researchers.