Category:Message systems

Revision as of 17:32, 14 April 2014 by Administrator1 (talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
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


This category has only the following subcategory.

Media in category "Message systems"

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