British Society for the History of Science  
   Describes the society and its activities. Includes contact information, link to journal and guide to courses in the UK.
   http://www.bshs.org.uk/

History of Science, Medicine, and Technology at Johns Hopkins University  
   Undergraduate, Graduate, Doctoral, and combined MD-PhD programs in the History of Science, Medicine, and Technology offered jointly through the School of Arts & Sciences and the School of Medicine.
   http://www.hopkinsmedicine.org/graduateprograms/history_of_science/

Mexican Society for the History of Science and Technology  
   Contact information and conference announcements in English and Spanish.
   http://www.smhct.org/

Society for the History of Natural History  
   International society devoted to the history of botany, zoology and geology, in the broadest sense, including natural history collections, exploration, art and bibliography.
   http://www.shnh.org/

History of Science Society  
   Dedicated to fostering interest and scholarly research in the history of science and its social and cultural relations. Site informs about the profession, teaching and research efforts, and society activities. Publishes the journal Isis.
   http://www.hssonline.org/

The Royal Society - Library  
   Library of the Royal Society of London, the premier British scientific institution since 1660. The library contains extensive resources for research in the history of science.
   http://www.royalsoc.ac.uk/page.asp?id=1646