transmission of messages

Scope Note

This category is used for to index information on the technologically simple transmission of messages. The category includes information on signaling devices (e.g., fire, smoke, blinker, semaphore); signal codes (e.g., drum language, flag codes, Morse code); cryptography; use of carrier birds and animals; messenger and human courier systems; etc. For information on specific methods of transmission use "Mail" (205), "Telephone and Telegraph" (206), "Radio and Television" (207), and "Internet Communications" (2010).

Identifier

Broader Term

• 200 communication

Related Terms

• 191 speech
• 2010 internet communications
• 205 mail
• 206 telephone and telegraph
• 207 radio and television
• 484 travel
• 495 auxiliary highway services
• 496 railways
• 648 external relations
• 726 warfare