Yes they should be capitalized.
no
It is proper and implied that you should, but I have seen people just put down Ny instead of NY... When mailing a letter you have both letters capitalized.
Two simple letters, both capitalized: MR
Yes, historians start both words with capital letters.
Yes, "Mon ami" should be capitalized as you have written it, with the M in Mon and the A in ami both capitalized.
No, the letters in "re" do not have to be capitalized unless it is at the beginning of a sentence. In most cases, "re" is written in lowercase.
MA is the postal abbreviation for Massachusetts.Note: All State abbreviations are two letters and both are capitalized.
In AP style, "PhD" should be written with no spaces and with both letters capitalized.
"OK" is typically capitalized because it is an abbreviation of "oll korrect," a humorous misspelling of "all correct." Capitalizing "OK" helps to distinguish it from other words and make it stand out as a separate entity in written text.
Yes, the first letters of "point of contact" are not capitalized unless the term is used as a proper noun or at the start of a sentence.
means to or towards when followed by the accusative caseWhen both letters are capitalized, it's an abbreviation for Anno Domini, "In the Year of the Lord".
I'm pretty sure it means not here, but if both of the letters are capitalized the it could be an abbreviation for New Hampshire.