Related Clues:
- Letter opener: Abbr
- Directive on an env
- Fax cover page abbr
- Sorting aid on an env
- Abbr. to facilitate routing
- Abbr. on an office memo
- Ltr.-routing letters
- Mail-directing abbr
- Abbr. at the bottom of some applications
- For, for short
- Anything inside an envelope: Abbr
- Package directive: Abbr
- Office mail abbr
- Bottom-of-business-letter notation
- Abbr. for routing of mail