PubMed comprises over 22 million citations for biomedical literature from MEDLINE, life science journals, and online books. PubMed citations and abstracts include the fields of biomedicine and health, covering portions of the life sciences, behavioral sciences, chemical sciences, and bioengineering.
PsycINFO, from the American Psychological Association (APA), contains more than 2 million citations and summaries of scholarly journal articles, book chapters, books, and dissertations, all in psychology and related disciplines, dating as far back as the 1800s. The database also includes information about the psychological aspects of related fields such as medicine, psychiatry, nursing, sociology, education, pharmacology, physiology, linguistics, anthropology, business, law and others.
All material cataloged by OCLC member libraries including: books, manuscripts, websites & internet resources, maps, computer programs, musical scores, films & slides, newspapers, journals, magazines, sound recordings, articles, chapters, papers, videotapes. Over 179 million records representing materials from 1000 BCE to the present, many with online links to the fulltext. Updated daily.