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A ltr. might be sent to yours, 4 letters
A wd. to Kmart shoppers, 4 letters
Abbr. at the top of a memo, 4 letters
Abbr. before a colon, 4 letters
Abbr. before a name in a memo, 4 letters
Abbr. before a name on an envelope, 4 letters
Abbr. before a name on top of a memo, 4 letters
Abbr. before some addressees, 4 letters
Abbr. before the name of a memo recipient, 4 letters
Abbr. indicating to whom it may concern, 4 letters
Abbr. often before a name, 4 letters
Abbr. often followed by a colon, 4 letters
Abbr. often seen under an address, 4 letters
Abbr. on a business envelope, 4 letters
Abbr. on a business envelope, perhaps, 4 letters
Abbr. on a business letter, 4 letters
Abbr. on a fax cover sheet, 4 letters
Abbr. on a FedEx env., 4 letters
Abbr. on an envelope, 4 letters
Abbr. on an invoice, 4 letters
Abbr. on business envelopes, 4 letters
Abbr. on some letter headings, 4 letters
Abbr. on the bottom of an envelope, 4 letters
Abbr. spotted in the mailroom, 4 letters
Abbr. that may precede a colon, 4 letters
Abbr. that often precedes a colon, 4 letters
Abbr. under an address, 4 letters
Address label abbr., 4 letters
Addressee footnote (abbr.), 4 letters
Addressee preceder, perhaps, 4 letters
Alerting wd. on a letter, 4 letters
Bottom-of-env. header, 4 letters
Bus. envelope notation, 4 letters
Bus. letter directive, 4 letters
Bus. letter heading, 4 letters
Bus.-letter letters, 4 letters
Business envelope abbr., 4 letters
Business letter abbr., 4 letters
Business letter letters, 4 letters
Business memo abbr., 4 letters
Business-env. letters, 4 letters
Business-envelope abbreviation, 4 letters
Business-envelope letters, 4 letters
Colon preceder on an env., 4 letters
Corp. memo directive, 4 letters
Directive on an env., 4 letters
E-mail heading: Abbr., 4 letters
Env. routing indicator, 4 letters
Envelope abbr. before a contact name, 4 letters
Envelope abbreviation, 4 letters
Envelope or memo abbr., perhaps, 4 letters
Envelope shortening, 4 letters
Envelope-directing abbr., 4 letters
Fax cover sheet abbr., 4 letters
It's for you, on a ltr., 4 letters
Letter abbreviation, 4 letters
Letter address abbr., 4 letters
Letter directive (abbr.), 4 letters
Letter routing abbr., 4 letters
Letter-routing letters, 4 letters
Letters directing letters, 4 letters
Letters on a business letter, 4 letters
Letters on an envelope, 4 letters
Letters on business envelopes, 4 letters
Letters on business letters, 4 letters
Letters on many business letters, 4 letters
Letters on many faxes, 4 letters
Letters on some letters, 4 letters
Letters that help a letter sorter, 4 letters
Line below a business name, perhaps, 4 letters
Ltr. recipient pinpointer, 4 letters
Mailing label abbr., 4 letters
Memo header, for short, 4 letters
Memo heading (abbr.), 4 letters
Memo heading, for short, 4 letters
Memo starter: Abbr., 4 letters
Memo-directing abbr., 4 letters
Name preceder on a bus. letter, 4 letters
Name preceder on an env., perhaps, 4 letters
Now hear this! (memo abbr.), 4 letters
Now hear this!: Abbr., 4 letters
Routing word: Abbr., 4 letters