Related Clues:
- Letters on an envelope addressed to a company
- Letter inclusion (Abbr.)
- Letters facilitating sorting
- Letter heading abbr
- Memo heading abbr
- Abbr. often capitalized on envelopes
- Insertion with a 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
- Accompanier of a letter inside an env
- Start of a subj. line