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 the 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...

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

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...

to wireless telegraphy. The Wireless Telegraphy Acts are laws regulating radio communications in the United Kingdom. Wireless telegraphy as a concept...

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

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

and arrive in a matter of minutes to hours, instead of days or weeks. Telegraphy facilitated faster and more profitable freight and passenger railway traffic...

inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting. In...

Guglielmo Marconi "for their contributions to the development of wireless telegraphy". He was a founder of Telefunken, one of the pioneering communications...

are also called, "Chappe telegraphs" or "Napoleonic semaphore". Optical telegraphy dates from ancient times, in the form of hydraulic telegraphs, torches...

Women in telegraphy have been evident since the 1840s. The introduction of practical systems of telegraphy in the 1840s led to the creation of a new occupational...

The timeline of North American telegraphy is a chronology of notable events in the history of the electric telegraphy in the United States and Canada,...

nonetheless distinct: One for telegraphy and the other for accessory devices built for computer-human communication: For radio-telegraphy, the term "keyer" specifically...

In amateur radio, high-speed telegraphy (HST) is a form of radiosport that challenges amateur radio operators to accurately receive and copy, and in some...

co-developer of Morse code in 1837 and helped to develop the commercial use of telegraphy. Samuel F. B. Morse was born in Charlestown, Massachusetts, the first...

By Wireless Telegraphy was a 1910 Australian play by William Anderson and Roy Redgrave. The play was based on the case of Hawley Harvey Crippen who was...

Acoustic telegraphy (also known as harmonic telegraphy) was a name for various methods of multiplexing (transmitting more than one) telegraph messages...

solid granite of the valley's hillside to house the telegraphy equipment. Porthcurno telegraphy facility closed in 1970, 100 years after it first began...

(Comité Consultatif International Téléphonique) and with long-distance telegraphy CCIT (Comité Consultatif International des Communications Téléphoniques...

first three decades of radio, from 1888 to 1918, called the wireless telegraphy or "spark" era, primitive radio transmitters called spark gap transmitters...

they can be represented by a smaller set of symbols, which is useful for telegraphy, steganography, and cryptography. The device was originally used for fire...

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

magnets to produce alternating current from a rotating armature. In early telegraphy, magnetos were used to power instruments, while in telephony they were...

Jesse H. Bunnell (November 28, 1843 – February 9, 1899) was a telegraphist, famous for his speed record in telegraph transmission, inventor, known for...

components. Although attempts were made in the 1880s to apply them to telegraphy, these designs proved inadequate for successful frequency-division multiplexing...