Open-Access Text Archivehosted by the Internet Archive offers permanent access for researchers, historians, scholars, people with disabilities, and the general public to historical collections that exist in digital format.
Oral History Online provides audio, video and full text access to collections of Oral History in English from around the world along with pointers to free audio and video files available on the Internet.
Ovid Healthstar : 1966 to present provides information from MEDLINE and focuses on both clinical and non-clinical health care delivery. It covers health services, technology, administration and research.
Oxford Reference Online Premiumis a comprehensive collection of subject dictionaries and encyclopedias covering a variety of fields from the Oxford University Press. It also includes English and bilingual dictionaries.