ISO 4217 (MA), SIX Interbank Clearing, is responsible for maintaining the list of codes. The following is a list of active codes of official ISO 4217 currency names. In the standard the values are called "alphabetic code", "numeric code", and "minor unit". The US dollar has two codes assigned: USD and USN (next day). The USS (same day) code is not in use any longer, and was removed from the list of active ISO 4217 codes in March 2014. According to UN/CEFACT recommendation 9, paragraphs 8–9 ECE/TRADE/203, 1996, available online: As of August 2018, there are no new codes planned to be
ISO/TC 37 are closely linked to the standardization efforts of IEC (International Electrotechnical Commission, founded in 1906) and ISO (International Organization for Standardization, founded in 1946). A terminology standard according to ISO/IEC Guide 2 (1996) is defined as "standard that is concerned with terms, usually accompanied by their definitions, and sometimes by explanatory notes, illustrations, examples, etc." ISO 1087-1:2000 defines terminology as ""set of designations belonging to one special language" and designations as "representation of a concept by a sign which denotes it"." Here, concept representation goes beyond terms (being only linguistic signs), which is also supported by the state-of-the-art of terminology