Crossword clues for 1, 2, and 3 (abbr.) 3 letters:MINThe 1 in {1,2,3}: Abbr.SEQ1, 1, 2, 3, 5, 8, 13 ..., e.g.: Abbr.NOS1, 2, 3, etc.: Abbr.NOS1, 2, and 3 (abbr.)NOS1, 2, 3, 4, 5, etc.: Abbr.DENOM$1 or $2, but not $3 (abbr.)