Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange...

Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about...

Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical...

"in recognition of their contributions to the development of wireless telegraphy". His work laid the foundation for the development of radio, television...

Morse, one of the early developers of the system adopted for electrical telegraphy. International Morse code encodes the 26 basic Latin letters A to Z, one...

Mass media Mobile phone Smartphone Optical telecommunication Optical telegraphy Pager Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications...

April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could...

Aerial telegraphy may refer to: Wigwag (flag signals), signalling by hand with a single flag Optical telegraphy, chains of fixed telegraph stations using...

submarine communications cables were laid beginning in the 1850s and carried telegraphy traffic, establishing the first instant telecommunications links between...

code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also...