The International Union of Pure and Applied Chemistry (IUPAC, on lowercase letters: iupac, or ) is an international federation of National Adhering Organizations that represents chemists in individual countries.
NSA je bila vključena v zasnovo algoritma DES (Data Encription Standard) v času njegovega nastanka v podjetju IBM in kasneje pri uveljavitvi šifrirnega standarda s strani Nacionalnega urada za standarde.