OAIster indexes citations and abstracts of multidisciplinary resources from open archives. Records contain a digital object link allowing users access to the object in a single click.The resources are available in the form of movies, audio files, datasets, digitized books.
OAIster is a union catalog of digital resources from over 1000 contributors worldwide. Items include digitized books and articles, born-digital texts, audio files, images, movies, and datasets. Collections include theses, technical reports, research papers, and image collections. These resources, often hidden from search engine users behind web scripts, are known as the "deep web." This is the freely accessible version from OCLC
Oceanic Abstracts indexes citations and abstracts from journal articles and conference papers in the fields of ecology, marine geology, biological oceanography, marine pollution, geophysics, geochemistry, marine biology, and maritime law. You can limit to peer-reviewed sources. 1981-present.
OECD iLibrary indexes citations, abstracts, and full-text journal articles, reports, and ebooks in all areas of world economics. Full text available in HTML and PDF, plus statistics in Excel. Our subscription includes six journals, though many content areas are freely available to any site visitor, such as the OECD Factbook, Working Papers, OECD Key Tables, and more. 1997-present.
Online Mendelian Inheritance in Animals is a database of genes, inherited disorders and traits in animal species (other than human and mouse) with links to relevant records from OMIM, PubMed, Gene, and soon to NCBI's Phenotype database.
Online Mendelian Inheritance in Man (OMIM) is a compendium of human genes and genetic phenotypes. The full-text, referenced overviews in OMIM contain information on all known mendelian disorders and over 12,000 genes. OMIM focuses on the relationship between phenotype and genotype.
Oncogenes and Growth Factory Abstracts indexes citations and abstracts from journal articles, conference papers, and books in the fields of medicine, immunology, virology, bacteriology, genetics, molecular biology, cell growth, and oncogenesis. You can limit to peer-reviewed sources. 1989-present.
The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video and that are in the public domain. Documents are commonly presented as PDFs; multimedia are presented in JPG and other video formats. Also includes bibliographic records for physical media.
ICPSR's Online Learning Center presents ICPSR data sets in accessible formats designed for use in classroom settings, particularly for introductory-level classes. It includes data sets from a wide range of ICPSR collections. Each includes a bibliography of related materials.
OpenDOAR is both a directory of open access repositories and a database of the contents of most of those repositories. These repositories can include books, articles, conference papers, data sets, multimedia, patents, software, theses and dissertations, and manuscripts from all academic disciplines.
Opposing Viewpoints offers over 14,000 pro/con viewpoint essays on controversial topics and current events, plus thousands of topic overviews, primary source documents, biographies of social activists, court case overviews, related full-text periodical articles, statistical tables, and multimedia content.
Oral History Online is both an index of full-text interviews and other oral history narratives and free oral history information online. The narratives cover diverse subjects, including civil rights and race relations, labor history, African American history, women's history, immigration studies, political history, American Indian history, regional history, and more.
The Organic Agriculture Information Access is an electronic collection of historic United States Department of Agriculture (USDA) publications related to organic agriculture. In this collection, there are almost 200 documents published before 1942 (before synthetic chemicals became widely used) that contain state-of-the-art information and data that is still very pertinent for today's agriculture. Documents available JPGs and text.
Organic Eprints is a repository of preprints (pre-review), postprints (post-review) and reprints (published) of scientific papers, conference papers and posters, theses, reports, books and book chapters, magazine articles, web products, project descriptions, and other published or unpublished documents related to organic agriculture. 1990-present.
Orlando indexes citations and full-text biographical and critical material for over 800 British women writers, including literary, social, and historical materials. Early medieval-present.
Search or browse over 2500 entries on almost one thousand years, from the first Olympic Games in 776 BC to the death of Marcus Aurelius in AD 180, this accessible and wide-ranging reference work draws on the groundbreaking Oxford Classical Dictionary to present more than 2,500 entries on the civilizations of ancient Greece and Rome. The dictionary covers key aspects of ancient Greek and Roman life and literature, such as science, social structure, philosophy, and religion, and contains comprehensive articles on central figures, both real and mythological, from Achilles to Zeno. References are linked via Get VText.
Browse or search over 600,000 words showing meanings, history, and pronunciations from across the English-speaking world. As a historical dictionary, the OED is very different from those of current English, in which the focus is on present-day meanings. You'll still find these in the OED, but you'll also find the history of individual words, and of the language—traced through 3 million quotations, from classic literature and specialist periodicals to films scripts and cookery books. You can also explore a timeline of when words entered the English language and the many works that have act as sources for the OED.
Organized alphabetically, each entry offers a brief history and outlines contemporary social, economic, political and religious issues. For each country there is a map and a quick-reference fact box containing data and statistics including languages, population, GDP, capital city, life expectancy, and more. References are linked via Get VText.
Oxford Reference Online provides full-text articles from fully-indexed, extensively linked, up to date, and cross-searchable dictionary, language reference, and subject reference works. You can search across the entire collection, subject collections, or individual works. References are linked via Get VText.