Answer: ltr

AnswerCrossword Clue
LTRForm of recommendation (abbr.)
LTRP.O. delivery
LTRPaper size: Abbr.
LTRCopier paper size: Abbr.
LTREnv. enclosure
LTRCopier tray size: Abbr.
LTRCopier tray abbr.
LTREnv. insert
LTROne may be SWAK
LTRPhotocopier tray size: Abbr.
LTRPiece of mail (abbr.)
LTRMany a grade: Abbr.
LTRPart of a wd.
LTRP.O. piece
LTREnv. stuffing
LTRScrabble unit (abbr.)
LTRPiece at the P.O.
LTRPrinting paper size (abbr.)
LTREnv. stuffer
LTRScrabble tile (abbr.)
LTRXerox setting: Abbr.
LTRCommon pg. size
LTRP.O. item
LTRUSPS delivery
LTRUSPS piece
LTRSize for a printer: Abbr.
LTRUSPS item
LTRU.S.P.S. delivery
LTRPc. of mail
LTREpistle (abbr.)
LTRScrabble tile: Abbr.
LTRA or B, e. g.
LTRPaper in an env.
LTREnv. contents
LTRP.O. box item
LTRE-mail predecessor: Abbr.
LTRA secy might take one from a CEO
LTREnv. filler
LTRUSPS unit
LTRA, e.g.: Abbr.