Why do not files and folders still accept a few different characters?
Ibelieveyoumusthavesomeprogrammaticinfluencetomakethatdecision.DidtheOperatingSystemshaveand/orstillhaverestrictionstobeproducedinthisway?
Aswellasdomainnamesthatoncedidnotacceptaccentanddifferentcharacters,andhavebeenworkingwiththemmorerecently.
AnInternationalDomainNameisadomainnamethatcancontain charactersnotdefinedbytheASCIIstandard.Thesecharactersinclude mostoftheaccentedlettersusedindifferentEuropeanlanguagesand othercharactersthatarenotfoundintheLatinalphabet.(i.e. accentués.com)
Technically,accentedcharacterscannotbeusedinDNS,whichiswhy everyIDNisencodedasastringofnon-accentedcharacterwhoseshape iscalledACE.Inthelatter,thedomainnamesbeginwithXN-to differentiateunaccenteddomainnames.(i.e.xn--accentus-h1a.com)
(removedfrom from here )
Example:
The domain name Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω ー
In this article of w3 talks about this "internationalization" of domains
User's expectations and use of the Internet have moved since then, and there is now a growing need to enable use of characters from any language in Web addresses. The Web address in your own language and alphabet is easier to create, memorize, transcribe, interpret, guess, and relate to. It is also important for brand recognition. This in turn, is better for business, better for finding things, and better for communicating. In short, better for the Web.
I think this question is more about the creation history (so it has a bit to do with programming) of the operating systems.