Related Clues:

• Chat room "Incidentally ..."
• Line below a business name, perhaps
• Bus. letter directive
• Mail-routing abbr.
• Texter's "incidentally"
• Letters before an emailed aside
• 'Incidentally,' to texters
• Texter's 'incidentally'
• Abbr. before a name on top of a memo
• 'One more thing,' for short
• Routing aid: Abbr.
• Fax cover sheet abbr.
• Business memo abbr.
• Letters in a bus. letter
• "Oh, and did I mention ...," in netspeak