Useful ISO standards for programmers Feb 19, 2025 Out of curiosity, I put together a list of some ISO standards that seem to come up regularly when programming and what year they were first put into practice. These are in rough order of frequency. ISO 8601 (1988): Date and time format ISO 3166 (1974): Country codes ISO 639 (1937): Language codes ISO 4217 (1978): Currency codes ISO 9660 (1988): Disk image format, aka .iso files ISO 8859 (1987): Text encodings, e.g. Latin-1