Initial: Abbr. (3 letters)

{ Answer }

LTR

{ Related Clues }

Alphabet pt.
Env. contents
Env. enclosure
Epistle: Abbr.
Missive: Abbr.
Photocopier abbr.
P.O. concern
P.O. item
U.S.P.S. delivery
Delivered piece: Abbr.
Item given to the P.O.
L, e.g.: Abbr.
Paper size: Abbr.
One photocopier tray: Abbr.
Piece of mail: Abbr.
P.O. box item
Ar, ef or dee: Abbr.
Copier page size: Abbr.
It may have a P.S.
Paper tray size: Abbr.
Photocopier tray size: Abbr.
Printer tray size: Abbr.

{ Tags }

abbr, box, common, contents, copier, delivery, env, epistle, initial, item, its, ltr, missive, paper, pg, photocopier, piece, po, size, tray, usps

{ Notes }

The answer LTR is common and appears about once every 250 puzzles.