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OAIster (pronounced oyster) is a union catalog of millions of records that represent open access resources. It was built by harvesting open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH).
Free Resource
odesi is a web-based tool for data exploration, extraction and analysis. It searches for survey questions (variables) across thousands of datasets held in a growing number of collections, and supports basic tabulation and analysis online. As well, it contains a digital repository for social science data the core of which is Statistics Canada's public-use survey data.
OldMapsOnline indexes historical maps from a number of participating institutions.
Free Resource
Open Book Publishers is a non-profit organisation which is committed to making high-quality research available to readers around the world.
Open Data Portal is a search portal for finding government data, including open datasets. It provides instructions on how to use a variety of data formats, including application programming interfaces (APIs), and presents examples of what people have done with open data across the country. The Open Data Portal contains data about Government of Canada services, financials, national demographic information, geospatial data, and high resolution maps.
Free Resource
OpenDOAR provides a listing of open access repositories around the world. Its primary aim is to support the academic and research activities of the global community, while maintaining a comprehensive and authoritative list of institutional and subject-based repositories.
Free Resource
OpenEdition brings together four platforms (, OpenEdition Books, Calenda, and Hypotheses) dedicated to electronic resources in the humanities and social sciences.
Free Resource
Opera del Vocabolario Italiano (OVI) is a collection Italian vernacular literary texts the majority of which are dated prior to 1375, the year of Boccaccio's death. The verse and prose works include early masters of Italian literature like Dante, Petrarch, and Boccaccio, as well as lesser-known and obscure texts by poets, merchants, and medieval chroniclers. The OVI database was created to aid in the compilation of an historical dictionary of the Italian language, the Tesoro della lingua italiana delle origini.
Our Roots is a fully searchable collection of books that are out of print or only available in distant collections, made readily accessible in digital format. Its aim is to preserve Canada’s unique identity, and bring it’s history to life through local histories.
Oxford Bibliographies Online (OBO) provides an introduction to the specialized literature on major and minor topics in different subject areas, and directs the user to the right chapter, book, website, archive, or data set they need for their research. Current subject areas include: Classics, and Medieval Studies.
The Oxford English Dictionary (OED) is widely regarded as the accepted authority on the English language. It is an unsurpassed guide to the meaning, history, and pronunciation of words— past and present—from across the English-speaking world.
Oxford Handbooks Online (OHO), is a multidisciplinary ebook platform for handbooks published by Oxford University Press. Current subjects collections include: Business and Administration, Philosophy, and Political Science.
Oxford Journals Online is a multidisciplinary collection of peer-reviewed journals published by Oxford University Press. It contains material across a range of disciplines from the sciences, social sciences and humanities.
Oxford Reference Online (ORO) provides access to Oxford Reference titles which have a wide coverage of topics in the arts and sciences. It includes language and subject dictionaries, thesauri, companions and encyclopedias.