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• Oncogenes and Growth Factors Abstracts
  Covers every aspect of oncogene research into the molecular basis of malignant transformations.

• Oceanic Abstracts
  Worldwide technical literature pertaining to the marine and brackish-water environment.

• OVID Gateway
  AARP Ageline, CINAHL, ERIC, INSPEC, MLA International Bibliography, NTIS, PsycINFO, Sociological Abstracts, SPORTDiscus.

• OED online (Oxford English Dictionary)
Entire text of the 22-volume Oxford English Dictionary.
 
• Oxford African American Studies Center
  Comprehensive collection of documents focused on the lives and events of African Americans, including primary sources, commentaries, images, maps, charts, and much more.
  
  
• Oxford Reference Online Core Collection
  Provides the full-text of reference books, including encyclopedias, handbooks, dictionaries published by Oxford University Press.
  
  
• Oxford University Press Journals
  Online access to full-text Oxford University Press Journals in the fields of the humanities, social sciences, and the sciences.