verb: (Internet slang, social media) Initialism of do not follow.
noun: (Britain, cartography) Initialism of Digital National Framework.
noun: (mathematics) Initialism of disjunctive normal form. [(logic) The form of a boolean formula that the formula has if the formula is a disjunction of conjunctions of literals, such as “(A and B and C) or (D and E and not F)”.]
