3-1-1

3-1-1
 n.— «The key point is that, in carry-on bags, each traveler is allowed no containers of liquids and gels larger than 3 ounces; everything must fit in a single one-quart bag; and there can be only one such bag per person. (The TSA shorthand for this is 3-1-1).» —“Editor’s notebook” The Capital (Annapolis, Maryland) Nov. 20, 2006. (source: Double-Tongued Dictionary)