ISO 4217 codes (STANAG 1059, 9th edition) use "X" codes for imaginary exercise countries ranging from XXB for "Brownland" to XXR for "Redland", as well as for major commands such as XXE for SHAPE or XXS for SACLANT. Consequently, ISO 4217 can use "X" codes for non-country-specific currencies without risk of clashing with future country codes. The inclusion of EU (denoting the European Union) in the ISO 3166-1 reserved codes list, allows the euro to be coded as EUR rather than assigned a code beginning with X, even though it is a supranational currency. The ISO 4217 standard includes a crude mechanism
International Organization for Standardization was created in 2009 for the purpose of "[s]tandardization in the field of energy efficiency and renewable energy sources". ISO has 162 national members. ISO has three membership categories: Participating members are called "P" members, as opposed to observing members, who are called "O" members. ISO is funded by a combination of: ISO's main products are international standards. ISO also publishes technical reports, technical specifications, publicly available specifications, technical corrigenda, and guides. International standards Technical reports Technical and publicly available specifications Technical corrigenda ISO guides These are meta-standards covering "matters related to international standardization". They are named using the format