World Meteorological Organisation (WMO)

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WMO owns 3 standards, which are:

Pubnum Title Date
306 Vol I.1 Manual on Codes - International Codes, Volume I.1, Annex II to the WMO Technical Regulations: part A- Alphanumeric Codes 2019
306 Vol I.2 Manual on Codes - International Codes, Volume I.2, Annex II to the WMO Technical Regulations: Part B – Binary Codes, Part C – Common Features to Binary and Alphanumeric Codes 2019
306 Vol 2 Manual on Codes - Regional Codes and National Coding Practices, Volume II 2018