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.

Olms Online is an e-book portal providing access to following collections: * Reprints: About 400 volumes with a focus on German language and literature and on philosophy. Olms Online presents titles with additional information. These are reprints with new introductions, afterwords, notes or indexes added by the editors. * Frankfurt and Leipzig Book Fair Catalogues: Book-trade catalogues, generally referred to as book fair catalogues, offer a unique overview of German and European book production over a period of nearly 300 years (1594-1860).

The Open Library of Humanities is an open access publishing platform, launched as an international network of scholars, librarians, programmers and publishers in January 2013. The OLH platform supports academic journals from across the humanities disciplines, as well as hosting its own multidisciplinary journal. Unlike many open-access publishers, the Open Library of Humanities does not charge individual author fees, but covers all costs by cooperating with an international library consortium.

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.

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 and books. Though access to current Optica Publishing Group content is no longer licensed, access to the 2007 - 2011 volumes of the journals and proceedings is still available.

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.

Developed cooperatively with scholars and librarians worldwide, Oxford Bibliographies offers exclusive, authoritative research guides across a variety of subject areas. Combining the best features of an annotated bibliography and a high-level encyclopedia, this cutting-edge resource directs researchers to the best available scholarship across a wide variety of subjects.

Oxford Constitutions of the World (OCW) contains fully-translated English-language versions of all the world's constitutions (both national and sub-national), accompanied by individual jurisdictional commentaries, and supplementary materials, including foundation documents, historical versions of constitutions, and amendment Acts/Laws. The Max Planck Encyclopedia of Comparative Constitutional Law (MPECCOL) is a comprehensive online resource containing analytical comparative articles offering a global overview of constitutional law. Subscribers also benefit from access to the Oxford Law Citator, one of the most powerful tools available for legal research, enabling onward research and ease of access to key materials.

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 platform serves as interface to over 300 journals published by the Oxford University Press (OUP) in the humanities, social sciences, law, science, and medicine. Two-thirds of this journals are published in partnership with learned and professional societies around the world. The MPG subscription enables full text access to OUP's full journal collection. It also covers article-processing charges for Max Planck authors in hybrid and selected fully open access journals offering CC-BY licenses. Further details are available on the MPDL website.

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 Handbooks Online is a collection of handbooks in 17 subject areas, bringing 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. For the first time, all Handbooks are available online as well is in print across the subject areas. Monthly updates introduce articles in advance of print publication and beyond the book, online-only content ensures the most current, authoritative coverage anywhere.

Oxford International Organizations (OXIO) provides materials on the law of international organizations (NGOs are excluded) and enables comparative research across a wide range of organizations. It shows how international organizations have contributed to the development of international law. It collects and analyses primary materials on international organizations, ranging from their constituent instruments, resolutions, agreements with host states, to national and international court decisions and states' declarations and policy statements. The resource includes materials on lesser-known and regional organizations as well as well-known ones such as the UN, WHO, IMF, and World Bank.