BR
I don't think it has an abbreviation because it is only two letters.
It is a common abbreviation for 'Italian'. It's based on the first two letters of the word. The two letters are the beginning letters for the word in a number of languages. So the abbreviation works under a number of situations, in a number of different languages.
BRO is the abbreviation for brother.
Kentucky
Possibly sacroiliac joint
A pure and simple two letters namely VA.the abbreviation is VA
Chemical
UT = UTAH This is the official postal state abbreviation. No periods. Just two capital letters.
MA is the postal abbreviation for Massachusetts.Note: All State abbreviations are two letters and both are capitalized.
Two simple letters, both capitalized: MR
DE is the abbreviation for Germany, which in German is called "Deutschland". So the abbreviation "DE" comes from the first two letters of the German name for their country.
SA is the abbreviation for the state of South Australia.