Related Clues:
- Chatroom digression shorthand
- Routing letters
- Memo abbreviation
- Abbr. on a memo
- Abbr. on a business envelope, perhaps
- Bus.-letter letters
- Abbr. on envelopes
- Abbr. before the name of a memo recipient
- Bus. envelope abbr.
- Business envelope abbr.
- Ltr. routing aid
- Corp. memo directive
- 'Incidentally,' in online shorthand
- Business-envelope letters
- Env. alerter