International Bureau of Weights and Measures

International Organization for Standardization

American National Standards Institute

United States Department of Commerce

International Union of Pure and Applied Chemistry

Economic Development Administration

Bureau of Industry and Security

National Oceanic and Atmospheric Administration

International Committee for Weights and Measures

General Conference On Weights and Measures

Health Level 7

Institute of Electrical and Electronics Engineers

ASTM International

NIST Special Publication 800-53

WWVB

Federal Information Processing Standard

Gaithersburg

WWV

JAMA