AOKS
Set to 3 different clues across 3 published puzzles, most often "All systems go" signals — The New York Times, Tuesday, 17 November 2009.
4 letters
Every clue on record, most used first
- "All systems go" signalsonce
The New York Times — Tuesday, 17 November 2009
- "Thumbs-up" responsesonce
The New York Times — Tuesday, 30 December 2008
- NASA green lightsonce
The New York Times — Thursday, 13 January 1994