PPD
Set to 7 different clues across 8 published puzzles, most often “Mail-order abbr.” — The New York Times, Saturday, 21 June 1997.
3 letters
Every clue on record, most used first
- Mail-order abbr.2 times
The New York Times — Saturday, 21 June 1997
- One way to send merchandise: Abbr.once
The New York Times — Sunday, 28 September 2003
- Mail order abbr.once
The New York Times — Tuesday, 23 January 2001
- How most goods must be ordered by mail: Abbr.once
The New York Times — Wednesday, 15 July 1998
- Shipment notation: Abbr.once
The New York Times — Saturday, 11 January 1997
- Shipping lettersonce
The New York Times — Thursday, 25 August 1994
- Abbr. in a mail-order adonce
The New York Times — Monday, 14 March 1994