Category:Message systems

Revision as of 22:21, 31 January 2012 by Beichner (talk | contribs)

Includes postal services and voice mail.

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


  • 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.