yan_g wrote:Thanks. I somehow understood there was an unexplainable exception for acronyms. About the last case I think you mean elision, not contraction though?
For the third option, you are utilizing elision to create a contraction
As an aside, I think the possessive form for multiple MP3s would be MP3s'Admittedly this is not very important in an informal setting lol
The possessive would depend on whether it was the plural form or the singular.
Ie. The mp3's house smelled like a rusty ferret. <- singular
The mp3s' house smelled like the junkies for which it was built. <- plural.
Yes… not important in an informal setting.