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.

McGraw-Hill's AccessMedicine.com is an online reference resource that includes Harrison's Online, Current Medical Diagnosis and Treatment, other core medical texts, Lange clinical review library, USMLE review, drug information, patient education, and many more resources.