[ggm]

For anyone young enough not to have used an ASR-33 or similar, the UNIX login: process would assume you were on uppercase only and "work" if you logged in as your username/password in uppercase. Guess it was an extra round or two of password hashing against the salt.

It remained in the "getty" process for some time, well into the {Free,Net,Open}BSD era.

CP/M and the like were pretty forgiving of commands being shouted too.

some languages (IMP, maybe others) used %reserved-word% formatting so you could do things pretty much how you wanted and then the system would know what was instructions.

[tyingq]

>It remained in the "getty" process for some time, well into the {Free,Net,Open}BSD era.

Still there in agetty: https://github.com/util-linux/util-linux/blob/master/term-ut... And, I imagine in other getty implementations.

[whartung]

Well CP/M was a mixed bag. It was case sensitive and the command line upshifted everything.

However programs like MS-BASIC would allow you to create files with lower case names that were then unmanageable from the command line.