IEEE

Category:Telegraphy

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== Subcategories ==
 
== Subcategories ==
  
*'''[[:Category:Electrical telegraphy|Electrical telegraphy]]'''
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*'''[[:Category:Electrical telegraphy|Electrical telegraphy]]''' - the long-distance transmission of messages or information via electrical signals, usually over telecommunications lines or radio
*'''[[:Category:Image telegraphy|Image telegraphy]]'''
+
*'''[[:Category:Image telegraphy|Image telegraphy]]''' - the use of telegraphic signals to send scanned images, such as in a fax machine
*'''[[:Category:Morse telegraphs|Morse telegraphs]]'''
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*'''[[:Category:Morse telegraphs|Morse telegraphs]]''' - the telegraphs created by Samuel Morse beginning in the 1830s, which were the first to allow electrical transmission of information over long distances
*'''[[:Category:Optical telegraphy|Optical telegraphy]]'''
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*'''[[:Category:Optical telegraphy|Optical telegraphy]]''' - a system of conveying information by visual signals, usually using towers with flags or shutters
*'''[[:Category:Radio telegraphy|Radio telegraphy]]'''
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*'''[[:Category:Radio telegraphy|Radio telegraphy]]''' - also known as wireless telegraphy, telegraphic signaling without wires connecting the end points of communication
*'''[[:Category:Semaphore telegraphs|Semaphore telegraphs]]'''
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*'''[[:Category:Semaphore telegraphs|Semaphore telegraphs]]''' - a kind of optical telegraphy in which information is communicated through towers with moving moving arms whose position expresses symbols, today can also refer to flag semaphore systems
 
*'''[[:Category:Submarine telegraphy|Submarine telegraphy]]'''
 
*'''[[:Category:Submarine telegraphy|Submarine telegraphy]]'''
 
*'''[[:Category:Telegraph applications|Telegraph applications]]'''
 
*'''[[:Category:Telegraph applications|Telegraph applications]]'''

Revision as of 17:29, 26 September 2011

Muirhead automatic telegraph syphon receiver, 1903
Muirhead automatic telegraph syphon receiver, 1903

A system of telecommunication for the transmission of graphic symbols, usually letter of numerals, by the use of a signal code. Types include electrical, radio, and wireless.

For a history on the telegraph, see the Telegraph article.

Subcategories

Pages in category "Telegraphy"

The following 107 pages are in this category, out of 107 total.

A

B

C

D

E

F

G

H

I

K

L

M

N

P

R

S

S cont.

T

U

W

Z

Media in category "Telegraphy"

The following 13 files are in this category, out of 13 total.