The big apple Moments: Use apostrophes for plurals of abbreviations which have money letters and intervals: M.D.’s, C.P.A.’s. Also use apostrophes for plurals formed from single letters: He received A’s and B’s on his report card. Mind your p’s and q’s. Funds letters used as text, numerals used as nouns, https://one-bookmark.com/story19910377/details-fiction-and-used-cars-uk