Yes, it is capitalized both when used to shorten "Saint" and "Street".
As an abbreviation it should be capitalized.
The 'L' of the abbreviation Ltd. should be capitalized.
It should be capitalized when it's an abbreviation.
C/o
hp is the English abbreviation for horsepower. Note that it is not capitalized. In Europe, the abbreviation may also be seen as PS.
As an abbreviation it should be capitalized.
Not, ft. is not normally capitalized.
Yes, A.M. should be capitalized.
The 'L' of the abbreviation Ltd. should be capitalized.
Saint Patrick's DayYes, all 3 words are capitalized, i.e., Saint Patrick's Day.
Yes. It's an abbreviation.
St. is the abbreviation for saint or street.
It should be capitalized when it's an abbreviation.
A capitalized letter
If the MOA is the abbreviation for aname like the Mall of Asia then the M and A should be capitalized.
C/o
"CD" is capitalized because it is an abbreviation for "compact disc", but "compact disc" is a common noun so would not be capitalized.