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OnePetro

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OnePetro.org is a multi-society library that provides a simple way to search for and access a broad range of technical literature related to the oil and gas exploration and production industry.

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This site boasts that one can convert just about anything to anything else. And with 50,000 conversions and 5,000 units, it has an impressive range.

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Opera in Video

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Performances, staged productions, interviews, and documentaries. (Alexander Street / ProQuest)

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Optics InfoBase

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Optical Society of America (OSA)'s online library for OSA flagship journals and for partnered and co-published journals.

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Orbis

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US and international company information from Bureau van Dijk including Datamonitor market research and company reports (same content as Mint Global with a different interface).

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Orchestral Music Online

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The digital version of David Daniels' reference work; search compositions by duration, instrumentation, chorus type, and soloists.

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OSIRIS

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US and international public company information from Bureau van Dijk.

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Oxford Art Online

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Grove Art Online provides web access to the entire text of The Dictionary of Art (1996, 34 vols.) with annual additions of new material and updates to the text, plus extensive image links and all the sophisticated search advantages possible with an online reference source.

Access to the database is limited to 5 users.

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Subtitled "The people who shaped the history of the British Isles and beyond," the Oxford DNB covers noteworthy people in any walk of life who were connected with the British Isles and British history worldwide (e.g.,/Benjamin Franklin Empress Eugenie of France, Mahatma Gandhi).
Access to the database is limited to 3 users.

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The OED Online contains the complete text of the 20-volume Second Edition, first published in 1989, together with its 3-volume Additions Series, published in 1993 (volumes 1 and 2) and 1997 (volume 3).

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This authoritative, dynamic resource brings together the best current scholarship in the field for students, scholars, government officials, community groups, and librarians to foster a more accurate and informed understanding of the Islamic world.

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Oxford Journals

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Provides access to a search interface that retrieves articles across all Oxford titles; searches can be limited to specific subject categories.

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OLDO provides fully searchable, completely comprehensive bilingual dictionaries, and unique study materials.

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Oxford Music Online

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Grove Music Online, the New Grove Dictionary of Opera, the New Grove Dictionary of Jazz, the Oxford Dictionary of Music, and the Oxford Companion to Music. (Access limited to 8 concurrent users.)

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Oxford Reference Online

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The Core Collection brings together 100 language and subject dictionaries and reference works - containing well over 60,000 pages - into a single cross-searchable resource.
Access to the database is limited to 5 users.

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The Oxford Text Archive (OTA) collects, catalogues, preserves and distributes high-quality digital electronic texts and other literary and language resources for research and teaching.

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OECD iLibrary

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Publications portal of the Organisation for Economic Co-operation and Development (OECD) and consists of three sections that include books and reports by theme, periodicals, and statistics.

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Oxford Scholarship Online (OSO) provides scholarly ebooks on a wide range of subjects. Chapters can be downloaded as PDFs. Subject areas include Biology, Business and Management, Classical Studies, Economics and Finance, History, Law, Linguistics, Literature, Mathematics, Music, Neuroscience, Palliative Care, Philosophy, Physics, Political Science, Psychology, Public Health and Epidemiology, Religion, Social Work, and Sociology. OSO also includes the full text of some publications from other university presses.

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OmniFile Full Text, Mega Edition contains a wealth of essential material for learning and detailed research in a single, easily-searched database.

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OxResearch Database

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This database provides succinct analytical articles covering world and regional economic and political developments of major significance.

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Archive of California's legislative information for dates 1993 to the present. Files available by using the Downloadable Database.

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This database contains abstracts of systematic reviews and randomized controlled trials relevant to occupational therapy. Trials have been critically appraised to assist with evaluation.

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Developed cooperatively with scholars and librarians worldwide, Oxford Bibliographies offers exclusive, authoritative research guides.

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Oxford Handbooks Online

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USC provides access to Business and Management, Classics, Economics and Finance, History, Linguistics, Music, Political Science and Psychology collections.

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OAIster searches freely available Open Access electronic documents and resources. Content includes theses, technical reports, research papers, and more.

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2,500 prints, photographs, drawings, posters, and cartoons on the history of medicine from the 17th to 20th centuries, hosted by McGill University Library.

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This site contains CATs and CAPs focussing on occupational therapy interventions. These CATs have not been formally peer reviewed, other than by the developer of the site.

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This database indexes therapy outcome information, published in peer-reviewed journals. Requires AOTA membership.

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An open access repository for peer reviewed materials. Check your publishing agreement to determine if you can deposit your articles as a preprint or postprint.

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A listing of open access data repositories in all subject areas with a concentration on the sciences. Good for identifying data repositories for your own data or finding raw datasets.

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A collection of legal tools and information for providing and using open data including sample open data commons licenses. This is good for when you have questions about sharing any of your datasets.

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Oxford Clinical Psychology provides full-text access to over 200 titles in Oxford's global clinical psychology publishing program in an integrated online service covering a broad range of specialty areas, disorders, and treatment modalities.

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Substantive, peer-reviewed, regularly updated articles on a wide range of topics dealing with ancient Greek and Roman history as well as many other topics in Classics.

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Online access to health news, health policies, health statistics, and other reports from around the world. Topics include quality of care, spending, value for money, financial sustainability, economics of prevention and public health, and pharmaceuticals

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