> Probably something like us.lax, fr.cdg, ko.inc, or a combination of country + number HK02, GB231 etc. This naming system has been for such a long time that I

> Probably something like us.lax, fr.cdg, ko.inc, or a combination of country + number HK02, GB231 etc. This naming system has been for such a long time that I woud'nt be surprised if any minor change breaks something somewhere. Probably some old school database that can only handle three letters, uppercase and no punctuation characters. Or perhaps a modern app that depends on json generated by parsing txt output from a terminal. Or even a barcode format that can't handle any more characters.