Related Clues:

• S.A.S.E., e.g.
• Env. contents
• Business letter abbr.
• Env. notation
• Abbr. on some letter headings
• Letter abbr.
• Bottom-of-letter abbr.
• SASE, e.g.
• Letters on letters
• Abbr. on 14-Across
• Abbr. on a business letter
• Memo header
• Ltr. insert
• Abbr. at the top of a memo
• Abbr. on an order