Related Clues:
- Chain email abbr
- Abbr. in an email header
- Memo heading abbr
- Abbr. often capitalized on envelopes
- Bus. letter abbr
- Mail routing abbr
- Abbr. before a memo recipient's name
- Envelope notation
- Abbr. on memos and fax cover pages
- Address block abbr
- Ltr. heads-up
- Start of a subj. line
- 'Skip ahead' abbr. on a music player
- Memo-heading abbr
- Email subject abbr