Related Clues:

• Envelope abbr.
• Memo starter
• Memo letters
• Memo starter: Abbr.
• Letter letters
• Abbr. on an envelope
• Memo abbr.
• 'Now hear this!': Abbr.
• Abbr. that often precedes a colon
• Address abbr.
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• Env. notation
• Abbr. on some letter headings
• Letter abbr.
• Letters on letters