Entrez

Provider: National Center for Biotechnology Information (NCBI)
Description: Cross searches other NCBI databases such as PubMed, OMIM, PubMed Central, etc.
Date Coverage: Late 1800's- present.
Subject Coverage: Health Science
Type: Multi-Database Search
Full Text: Limited
Special Features: Resources avaiable for various science related topics.
Access Restrictions: None. Free and open to all.
Help: Entrez Help