This is curious, I mean, as you know I'm Italian, so I've to learn these abbreviations... Necessarily, right?
Instead, I thought you guys, from USA-GB-Australia and whenever English is the Official Language, already knew them... ie, I thought these abbrevations "belonged" somehow to the Common Language... but they don't still 100% belong to... right?
I think this is also due to the Cell Phone SMS way of writing (for every Language), isn't it?
Anyway, Excellent!!! Another "Thing" to "keep"!!!
Congratulations on your 300th Post man... don't stop now!!! 8)