International Federation of National Standardization
Historical organization name; it is an organization name. The abbreviation 'pn' in the gloss likely stands for 'proper noun'.
The International Federation of National Standardization was an organization that promoted international standardization.
Compound of 万国 (all nations), 規格 (standard), 統一 (unification), and 協会 (association). The name reflects its purpose of unifying standards across countries.