Science and Engineering Indicators and other titles published by the National Science Board are works of the U.S. federal government and carry no claim to copyright. Thus, material from these reports may be freely used as in the public domain. We do request that use of work from any of these reports be credited, and we appreciate voluntary reporting of use. When possible, we would appreciate being notified when work that cites our sources is published.

The recommended citation for this report is:
National Science Board. 2018. Science and Engineering Indicators 2018. Alexandria, VA: National Science Foundation (NSB-2018-1).