Category:Message systems: Difference between revisions
From ETHW
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
Includes postal services and voice mail. | Includes postal services and voice mail. | ||
[[Image:Message Systems Morse code in British signal exchange Somme 1916.jpg|thumb|right|A 1916 photo of British officials using Morse Code at The Battle of Somme]] | |||
== Subcategories == | == Subcategories == | ||
Revision as of 22:21, 31 January 2012
Includes postal services and voice mail.
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
Pages in category "Message systems"
The following 4 pages are in this category, out of 4 total.
Media in category "Message systems"
The following 2 files are in this category, out of 2 total.
Fig05-SiemensKarolusFacsimileSystem1927 0622.jpg 1,731 × 2,170; 584 KB
Message Systems Morse code in British signal exchange Somme 1916.jpg 766 × 599; 74 KB
