- Photographic message services (1)
- Cable, telegram, and telex services (5)
- Cablegram service (1)
- Mailgram services (3)
- Telegram services (1)
- Telegraph services (3)
- Teletypewriter services (5)
- Electronic mail (8)
- Facsimile transmission services (31)
- Nonvocal message communications (7)
