It's also interesting to note how many of these systems are still running on a daily basis for 50+ years now. Stuff like your airplane boarding passes and hotel

It's also interesting to note how many of these systems are still running on a daily basis for 50+ years now. Stuff like your airplane boarding passes and hotel bookings still use all-upper encoding because these systems go back to the 1960s [1]. Cheques and other bank documents still use those MICR typefaces, which are similarly still encoded in all-caps [2] [1] https://media.ccc.de/v/33c3-7964-where_in_the_world_is_carmen_sandiego https://media.ccc.de/v/33c3-7964-where_in_the_world_is_carme... [2] https://en.wikipedia.org/wiki/Magnetic_ink_character_recognition https://en.wikipedia.org/wiki/Magnetic_ink_character_recogni...