Category:Telegraphy
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== Subcategories == | == Subcategories == | ||
| − | *'''[[:Category:Electrical telegraphy|Electrical telegraphy]]''' | + | *'''[[: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]]''' | + | *'''[[: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]]''' | + | *'''[[: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]]''' | + | *'''[[: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]]''' | + | *'''[[: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
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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
- Electrical telegraphy - the long-distance transmission of messages or information via electrical signals, usually over telecommunications lines or radio
- Image telegraphy - the use of telegraphic signals to send scanned images, such as in a fax machine
- 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
- Optical telegraphy - a system of conveying information by visual signals, usually using towers with flags or shutters
- Radio telegraphy - also known as wireless telegraphy, telegraphic signaling without wires connecting the end points of communication
- 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
- Submarine telegraphy
- Telegraph applications
- Telegraph transmission speed
- Telegraph transmission technology
- Wireless telegraphy
Subcategories
This category has the following 11 subcategories, out of 11 total.
EIMO |
RST |
T cont.W |
Pages in category "Telegraphy"
The following 94 pages are in this category, out of 94 total.
Media in category "Telegraphy"
The following 12 files are in this category, out of 12 total.
