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The Observer
Complete archive of the Observer newspaper (London, England), including all issues from 1791 to 2003.


OnePetro
OnePetro is an online library of technical literature for the oil and gas exploration and production industry and is the definitive resource on upstream oil and gas


Oxford Art Online
Grove Art Online (available via Oxford Art Online) provides access to key online art resources including the Grove Dictionary of Art, the Encyclopedia of Aesthetics, Oxford Companion to Western Art, and Concise Oxford Dictionary of Art Terms. Our access to subscription does not include the Benezit Dictionary of Artists. You may prefer to limit search results to Available (green padlock) resources only. Grove Art Online includes 30,000 articles and images 6,000 subject entries and 20,000 biographies, subject guides, timelines and bibliographies. Articles are written by academic scholars, and images are sourced from leading art museums and galleries.


Oxford Dictionary of National Biography (Oxford DNB)
Reference source on key figures in British history and society from 100BC to the present day.  Includes 60,000+ biographies, 11,000+ portraits, plus archival references and bibliographies.


Oxford English Dictionary (OED)
Definitive reference source on the English language, providing a guide to the spelling, meaning, history (etymology), and pronunciation of 600,000+ words across the English-speaking world, using the International Phonetic Alphabet


Oxford Reports on International Law (ORIL)
Collection of full-text law reports on public international law, reporting on international courts, domestic courts and ad hoc tribunals. Includes the following series: International Law in Domestic Courts (ILDC), International Courts of General Jurisdiction (ICGJ), International Human Rights Law (IHRL), International Criminal Law (ICL), International Investment Claims (IIC), International Trade Law Decisions (ITL), and International Law in EU Courts (ILEC).