Category:Message systems

Revision as of 20:54, 14 January 2013 by Administrator1 (talk | contribs)

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

Includes postal services and voice mail.


  • 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


This category has only the following subcategory.

Media in category "Message systems"

The following 2 files are in this category, out of 2 total.