The maddening mess of airport codes [video]
The entire world of airline coding (as in "encoding") is fascinating to me: there are all kinds of ancient semi-human-readable formats like ACARS[1] and IATA Teletype[2] that are still pushing data around. Not the mention standard meal codes[3], like BLML for "bland meal" and CLML for "celebration cake meal."[1]: https://en.wikipedia.org/wiki/ACARS[2]: https://en.wikipedia.org/wiki/Airline_teletype_system[3]: https://en.wikipedia.org/wiki/International_Air_Transport_As...