* Aleksandr S. Popov (Russia) invents the lightning-recording antenna. On 7 May he presents the first receiver of electromagnetic waves to the St. Petersburg Physical and Chemical Society.
* Near Bologna (Italy) Guglielmo Marconi carries out the first experimental transmission of wireless signals over a distance of 400, then 2,000 metres.
* 2 June: In England, Marconi files a patent for a system of wireless communication, and later transmits and receives Morse code signals over a 3 km distance.
* Eugene Ducretet (France) experiments with wireless telegraphy.
* Marconi founds the Wireless Telegraph and Signal Company, Ltd., in London.
* Karl Ferdinand Braun (Germany) invents a device which completes "the tuned circuit", matching the wavelength of transmitter and receiver, a procedure discovered by Sir Oliver Lodge (U.K.).
* 5 November: Ducretet describes to the French Academy of Sciences transmissions between the Eiffel Tower and the Pantheon in Paris (4 km).
* A 42-km link is established in France between two cruisers equipped with Ducretet-Popov devices.
* 28 March: Marconi makes a wireless transmission across the English Channel from Dover to Wimereux.
* Popov makes transmissions covering 50 km. from the shore to Russian ships.
* Marconi obtains a patent for a process enabling an operator to select a wavelength. (The first receivers picked up all frequencies at the same time.) February: The first commercial wireless station is set up, on the island of Borkum (Germany).
* 12 December: Marconi makes the first transatlantic wireless transmission, using Morse code, between Poldhu in Cornwall (U.K.) and St. John's, Newfoundland.
* In Germany Siemens and Allgemeine Elektrizitats Gesellschaft create a joint affiliate, Telefunken.
* Valdemar Poulsen (Denmark) invents a means of producing continuous waves by "arc transmission", later used to construct high-frequency alternators for sending continuous radio waves.
* Gustave Ferrie sets up a long-distance telegraph station on the Eiffel Tower.
* The London Times and the New York Times receive information about the Russo-Japanese war via radio.
* First experiments with telegraphic radio links in Spain.
* In France a commercial maritime radio network is set up under the control of the Ministry of Posts and Telegraphs.
* 16 November: John Fleming (U.K.) invents the thermionic two-electrode valve, or diode, making possible sound transmission.
* A radiotelegraphy station is built on the Adriatic coast in the principality of Montenegro.
* In Canada, the Wireless Telegraph Act stipulates that a licence must be obtained for wireless telegraphy.
* First wireless communication in Spain, between El Ferrol del Caudillo and La Coruna.
* Discovery of the properties of galena (lead sulphide) as a detector of radio-electric signals.
* Reginald Fessenden (U.S.A.) constructs a high-frequency alternator and succeeds in transmitting the human voice via radio.
* 25 October: Lee de Forest (U.S.A.) applies for a patent on the triode, a 3-electrode valve that makes possible the detection, transmission and amplification of radio signals.
* 2 April: De Forest experiments with his triode in France by broadcasting from the Eiffel Tower.
* 13 January: A broadcast from the Metropolitan Opera House in New York featuring Enrico Caruso is arranged by Lee de Forest and is heard 20 km away on a ship at sea.
* 15 April: Radio amateurs pick up the SOS sent out by the Titanic.
* Amateurs with galena-crystal radios listen in to the first regular weekly …