New York Situations: Use apostrophes for plurals of abbreviations which have money letters and periods: M.D.’s, C.P.A.’s. Also use apostrophes for plurals fashioned from solitary letters: He obtained A’s and B’s on his report card. Mind your p’s and q’s. JayJay 37k33 gold badges6363 silver badges111111 bronze badges six 3 https://carzen.co.uk