標準

ISO官方網站http://www.iso.org

Because "International Organization for Standardization" would have different acronyms in different languages ("IOS" in English, "OIN" in French for Organisation internationale de normalisation), its founders decided to give it also a short, all-purpose name. They chose "ISO", derived from the Greek isos, meaning "equal". Whatever the country, whatever the language, the short form of the organization's name is always ISO.

International Organizagion for Standardizations, ISO

如果真的是用縮寫字的話，那就應該用IOS，問題它偏偏就不是縮寫字，而是由希臘文轉過來的字，原希臘文為isos，這是公平的意思。