PKN - portal wiedzy normalizacyjnej WIEDZA
Polski Komitet Normalizacyjny
Polskie Centrum Akredytacji
Oznaczenie CE
International Organization for Standardization
International Electrotechnical Commision
International Telecommunication Union
European Committee for Standardization
European Committee for Electrotechnical Standardization
European Telecommunications Standards Institute
Deutsches Institut für Normung e. V.
British Standards Institution
American Society for Testing and Materials
American National Standards Institute
Accuris
Techstreet
E-Standards Store