Definition of Activity code

Glossary of Confusing NIH Terms
Activity code
A three digit code identifying the type of award mechanism (e.g., R01 is a research project grant). Major series are: F - fellowship, K - research career, N - research contracts, P - research programs and centers, R - research projects, S - research-related programs, T - training, U - cooperative agreements, and Y - interagency agreements (see NIAID extramural funding mechanisms.) .

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