The database OLC Physics 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, the central subject library of Germany for technology and their related subjects, especially chemistry, computer sciences, mathematics and physics.

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.

OLC Psychology is a subject oriented selection of bibliographic data from the Online Contents database. This database is regularly enhanced by table of contents data from additional periodicals out of the special collections of the Saarland University and State Library (SULB) Saarbrücken, the central subject library for Psychology in Germany. Currently 878 journals are being indexed back to the year of publication in 1993.

Online Contents Social Sciences provides access to the tables of contents of journals in the field of sociology and social policy. It is a subject-oriented selection of bibliographic data from the Database Online Contents. The database is regularly enhanced by table of contents data from additional periodicals out of the special collections of the University Library Cologne.

OLC Technology 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, the central subject library of Germany for technology and their related subjects, especially chemistry, computer science, mathematics and physics. Currently 2,393 journals are being indexed back to the year of publication in 1993.

Open Syllabus is a non-profit research organization that collects and analyzes millions of syllabi to support novel teaching and learning applications. Open Syllabus helps instructors develop classes, libraries manage collections, and presses develop books. It supports students and lifelong learners in their exploration of topics and fields. It creates incentives for faculty to improve teaching materials and to use open licenses. It supports work on aligning higher education with job market needs and on making student mobility easier. It also challenges faculty and universities to work together to steward this important data resource. Open Syllabus currently has a corpus of nine million English-language syllabi from 140 countries. It uses machine learning and other techniques to extract citations, dates, fields, and other metadata from these documents. The resulting data is made freely available via the Syllabus Explorer and for academic research. The project was founded at The American Assembly, a public policy institute associated with Columbia University. It has been independent since 2019. All of the syllabi in the current collection are English language documents – including from universities where English is not the primary teaching language.

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.

The OSF Preprints search combines records from various preprint repositories, including arXiv, bioRxiv, Cogprints, PeerJ, PsyArXiv, RePEc and SocArXiv.

Our World in Data is an online publication that shows how living conditions are changing. The aim is to give a global overview and to show changes over the very long run, so that we can see where we are coming from and where we are today.

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.

Oxford Bibliographies offers exclusive, authoritative research guides. Combining the features of an annotated bibliography and a high-level encyclopedia. Every article in the database is an authoritative guide to the current scholarship, written and reviewed by academic experts, with original commentary and annotations.

Oxford Bibliographies in International Law offers exclusive, authoritative research guides that combine the best features of an annotated bibliography and a high-level encyclopedia. The database provides a comprehensive introduction to the essential body of literature that has shaped scholarly thought. It provides expert recommendations on the works available in International Law whether it be a chapter, a book, a journal article, a Website, blog, or data set. The entries provide a critical reflection on the literature and define the concepts necessary for legal aspects of international problems. The module “International Law” comprises e.g. the following main subjects: “History of International Law”, “Human Rights”, “International Economic Law”, “International Environmental Law”, “International Humanitarian Law”, “Sources, Foundations, and Principles of International Law”, “Specific Nations and Regions”, “Territory and Sea Law”, “Theory of International Law”. RSS alerts notify you when articles and bibliographies are updated.

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.

The Oxford Legal Research Library provides access to leading works relevant to "International Commercial Arbitration" as well as "International Commercial Law" and "Private International Law". A title list can be found at https://olrl.ouplaw.com/page/476/ (the product "Financial and Banking Law" is not licensed).

Oxford Music Online contains the full text of several music reference works, most importantly Grove Music Online, The Oxford Companion to Music, and The Oxford Dictionary of Music

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.

This historic journal index enables the simultaneous search in millions of citations for articles published in the arts, humanities and social sciences, across more than 300 years. It enables researchers quickly and comprehensively to identify articles relevant to their field of study and reduces what could take years of research to a matter of minutes. Journals indexed span 37 key subject areas and multiple languages.

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.