Context : ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest. 
Subject : ISO 3166-1 alpha-2 
Relation : standards body
Who set the standards for ISO 3166-1 alpha-2?