Related Clues:

• P.O. piece
• P.O. box item
• Epistle: Abbr.
• Copier tray abbr.
• Abbr. on a copier paper tray
• Wd. component
• Wd. fragment
• Monogram pt.
• U.S.P.S. delivery
• Brief correspondence?
• A, B, or C: abbr.
• USPS unit
• Env. filler
• USPS piece
• Envelope enclosure: Abbr.