The lexicon of the top500 ( The Encyclopedia for Classification Codes ) explains the codes and definitions in the world of economical classifications.
NAICS Code 8132 Grantmaking and Giving Services
The NAICS Code 8132 is described as
Grantmaking and Giving Services It belongs to the code group
NAICS Code 813 (Religious, Grantmaking, Civic, Professional, and Similar Organizations)