Clue: Routing-memo abbr.

Answer: ATTN

Length: 4

---

Similar Clues:

• Memo-routing abbr. (ATTN with 4 letters)
• Memo abbr. (e.g. ASAP with 4 letters)
• Memo abbreviation (e.g. ASAP with 4 letters)
• Mail-routing abbr. (ATTN with 4 letters)
• Routing abbr. (ATTN with 4 letters)
• Abbr. at the top of a memo (ATTN with 4 letters)
• Top-of-memo abbr. (ATTN with 4 letters)
• Routing aid: Abbr. (ATTN with 4 letters)
• Memo-heading abbr. (ATTN with 4 letters)
• Letter-routing abbr. (ATTN with 4 letters)