Related Clues:

• Bus. letter abbr
• Mail routing abbr
• Incidentally, in e-mail shorthand
• 'Incidentally,' online
• Abbr. before a memo recipient's name
• "Before I forget," in texts
• 'Before I forget,' in texts
• Envelope notation
• Abbr. on memos and fax cover pages
• Address block abbr
• Ltr. heads-up
• "Incidentally," in texts
• 'Incidentally,' in texts
• 'Before I forget' letters
• Start of a subj. line