Related Clues:

• "Incidentally," in IMs
• Ltr.-routing letters
• 'Oh, also ...,' in a text
• Mail-directing abbr
• "Incidentally," in a text
• Texter's 'Oh, just remembered ...'
• 'just 1 more thing . . .'
• 'I almost forgot . . .' in texts
• For, for short
• FYI cousin
• Texter's 'just so you know'
• Texter's "just so you know"
• Lead-in to a texter's afterthought
• 'Oh, P.S.'
• "I meant to tell u ..."