n.b.
— Noun
– English
~ a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something; "the margins of his book were generously supplied with pencilled NBs"
N.C.
— Noun
– English
~ a state in southeastern United States; one of the original 13 colonies
N.D.
— Noun
– English
~ a state of north central United States bordering on Canada