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Category:Message systems

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Includes postal services and voice mail.

A 1916 photo of British officials using Morse Code at The Battle of Somme
A 1916 photo of British officials using Morse Code at The Battle of Somme


Subcategories

  • Postal services - the services used to transmit physical objects and tangible letters across space
  • Voice mail - a computer based system that allows users to exchange voice messages

Subcategories

This category has the following 2 subcategories, out of 2 total.

P

V

Pages in category "Message systems"

This category contains only the following page.

C

Media in category "Message systems"

This category contains only the following file.

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