Why did older computers and OSes use UPPER case instead of lower case?

Submitted ⁨⁨1⁩ ⁨year⁩ ago⁩ by ⁨bot@lemmy.smeargle.fans [bot]⁩ to ⁨hackernews@lemmy.smeargle.fans⁩

https://retrocomputing.stackexchange.com/questions/28141/why-did-older-computers-and-oses-use-upper-case-instead-of-lower-case