COS
Set to 42 different clues across 63 published puzzles, most often “Firms: Abbr.” — The New York Times, Monday, 5 July 2010.
3 letters
Every clue on record, most used first
- Firms: Abbr.9 times
The New York Times — Monday, 5 July 2010
- Fortune 500 listings: Abbr.4 times
The New York Times — Tuesday, 11 November 2008
- Nasdaq listings: Abbr.3 times
The New York Times — Sunday, 23 September 2007
- Lettuce variety3 times
The New York Times — Saturday, 23 June 2007
- N.Y.S.E. listings2 times
The New York Times — Wednesday, 28 April 2010
- Comedian Bill, informally2 times
The New York Times — Monday, 11 December 2006
- Trigonometry abbr.2 times
The New York Times — Monday, 1 September 2003
- Businesses: Abbr.2 times
The New York Times — Monday, 25 March 2002
- Yellow pages listings: Abbr.2 times
The New York Times — Saturday, 19 January 2002
- Comedian Bill, to friends2 times
The New York Times — Monday, 2 February 1998
- Inc. article subjectsonce
The New York Times — Thursday, 12 November 2009
- "I Spy" co-star Bill, familiarlyonce
The New York Times — Monday, 5 October 2009