I was just updating my earlier reply after I thought to look at their use cases page. I should write a better criticism about that. Usernames: No, store them

I was just updating my earlier reply after I thought to look at their use cases page. I should write a better criticism about that. Usernames: No, store them as given, just like real names. Also, use UTF-8. Consult the visual rendering engine for decomposing the value to display units, or a rendered result, etc. Asset tags: Just use hex, or numbers. Mortal people looking at either of those systems understand them quickly enough without further documentation. It's only 4 vs 5 letters, worth the lack of a binder describing why you're not missing crates. Cheat codes: This is actually fine, I don't care, it isn't important. Though hex or anything else is just as fine. Cryptography: Less possible artifacts from less letters. 0123456789ABCDEF typically don't contain any difficult to read or alias characters for dyslexic or other non-perfect readers. If density matters (again 4 vs 5) no printed media is going to work out. Geographic coordinates / addresses: Everyone's using base 10 here, either as big floats or as sets of numbers that are friendly to read. Those articles that have average consumers use an app and send 3 words back from it are making up for the missing safety feature of 911 sending a well formatted set of SMS messages with the call indicating the handset's current GPS data.