There are many international, regional, and national Organizations, the most important of which are:   International Organization for Standardization (ISO)  International Electrotechnical Commission (IEC)  Codex Alimentarius Commission (CODEX)  European Standardization Organizations (CEN, CENELEC) and ETSI)  American Society for Testing and Materials (ASTM International),  International Organization of Legal Metrology (OIML), and  British Standards Institution(BSI).