U.S. flag

An official website of the United States government

  • Online Services, Training, and Resources

    The NIH Library is here to help you—online—with your virtual information and research needs. Check out the extensive set of NIH Library service and resources that are available online.

  • SciFinder Chemistry Database Class at the NIH Library

    Register to attend this class on SciFinder, a chemistry database that provides integrated access to a comprehensive collection of chemical substances, reactions, and literature references. 

  • NIH Celebrates Pi Day

    The Greek letter π is the symbol for the irrational number representing the ratio of the circumference of a circle to its diameter. It is approximately 3.1415926. Pi Day is an annual celebration on March 14th (3/14), with this year’s being a very special Pi Day (3/14/15).