PubMed is the public access version to Medline, the premier database for biomedical literature. PubMedPlus is an enhanced version with links to full-text journals that the Penn Library subscribes to. Once the "Log-in" is completed, any full-text articles to which Penn Libraries subscribe will become available within the PubMed system by clicking on the Penn Text icon. The MEDLINE database is widely recognized as the premier source for bibliographic coverage of biomedical literature. The PubMed version of MEDLINE includes the PREMEDLINE database, which provides very current basic citation information and abstracts before the full records are prepared and added to MEDLINE. New records are added to PREMEDLINE daily. In addition, for participating journals that are indexed selectively for MEDLINE, PubMed includes all articles from that journal, not just those that are included in MEDLINE. PubMed is also the literature component of the Entrez retrieval system for molecular biology information. To retrieve Bioethics articles, limit search to Bioethics subset.  Holdings: 1950 to the present. Updated daily.

EBSCO MegaFILE
General, multidisciplinary fulltext periodical database, covering all scholarly disciplines, with many general and popular magazines, and news sources. Includes bibliographic citations with indexing and abstracts for more than 16,000 periodicals.
Holdings: Coverage varies: mostly 1990s to present.

PAIS International
-from CSA Databases
Bibliographic citations with indexing on contemporary public affairs and policy issues worldwide related to a wide range of topics: agriculture, banking, finance, business, demographics, education, health, environment, planning, public administration, law and legislation, and international relations. The PAIS Archive extends current PAIS coverage back to 1915. Materials indexed include journal articles, books, government documents, statistical directories, grey literature, research reports, conference reports, publications of international agencies, microfiche, and Internet material. Newspapers and newsletters are not indexed.
Holdings: 1915-

The premier database for bibliographic coverage of biomedical literature. MEDLINE encompasses information from Index Medicus, Index to Dental Literature, and International Nursing Index, as well as other sources of coverage in the areas of allied health, biological and physical sciences, humanities and information science as they relate to medicine and health care, communication disorders, population biology, and reproductive biology. Resources in all languages are represented. Searches can be limited to the Bioethics subset.

A unique Web-based system that provides simultaneous searching of multiple databases and resource types located at the National Library of Medicine. Individual searches can yield journal citations, books, serials, audio-visual material, consumer health information including drug information and meeting abstracts. The databases being searched simultaneously are: MEDLINE, OLDMEDLINE, LOCATORplus, MEDLINEplus, DIRLINE, AIDS Meetings, HSR Meetings and HSR Projects. References from the defunct databases  AIDSLINE, BIOETHICSLINE, HEALTHSTAR, HISTLINE, POPLINE and SPACELINE have been merged into MEDLINE.