The Wikipedia page for "Internet" provides a comprehensive overview of this global network of interconnected computer networks that has revolutionized communication and information sharing.

The Medical Library Association (MLA) is a nonprofit educational organization with more than 3,400 health-sciences information professional members.

MEDLINE (Medical Literature Analysis and Retrieval System Online, or MEDLARS Online) is a bibliographic database of life sciences and biomedical information.

The National Institutes of Health (NIH) is an agency of the United States Department of Health and Human Services.

PubMed is a free search engine for accessing a vast collection of biomedical literature, including scientific journals, clinical research papers, and articles on health-related subjects.