Examples from the Web for apb
Historical Examples of apb
Find the area of triangle APB in terms of x, the side of the square.The Canterbury Puzzles
Henry Ernest Dudeney
abbreviation for (in the US)
also a.p.b., 1960, police jargon initialism for all-points bulletin, itself attested by 1953 (perhaps more in the jargon of detective novels than in actual police use).