morse-cable code
51History of the telephone — The history of the telephone chronicles the development of electrical technology that enabled bidirectional human speech conversations over distances farther than a person could shout.Telephone prehistoryMechanical devicesBefore the invention of… …
52Guglielmo Marconi — Born 25 April 1874(1874 04 25) Palazzo Marescalchi, Bologna …
53Communications in the People's Republic of China — Telecommunications in China redirects here. For the industry, see Telecommunications industry in China. This article is about Communications in the People s Republic of China, excluding Hong Kong and Macau (see Communications in Hong Kong and… …
54William Thomson, 1st Baron Kelvin — Infobox Scientist box width = 300px name = Lord Kelvin image width = 300px caption = William Thomson, 1st Baron Kelvin (1824 1907) birth date = birth date|1824|6|26|df=y birth place = Belfast, Co. Antrim, Northern Ireland death date = death date… …
55International maritime signal flags — The set of signal flags on the bridge of the Liberty ship SS Jeremiah O Brien The system of international maritime signal flags is one system of flag signals representing individual letters of the alphabet in signals to or from ships. It is a… …
56Telecommunications in the People's Republic of China — Telecommunications in China redirects here. For the industry, see Telecommunications industry in China. This article is about Communications in the People s Republic of China, excluding Hong Kong and Macau (see Communications in Hong Kong and… …
57Spy vs. Spy — Infobox comic strip title=Spy vs. Spy caption= author=Antonio Prohias website= rss= atom= status=Concluded, in reruns first=1961 last=1998 syndicate= publisher= genre=Humor rating= preceded by= followed by= Spy vs. Spy is a wordless black and… …
58Frederick G. Creed — Frederick George Creed (1871–1957) was a Canadian inventor, who worked in the field of telecommunications, and played an early role in the development of SWATH vessels, The CCGS Frederick G. Creed , a SWATH vessel, is named after him.CareerCreed… …
59Superheterodyne receiver — A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… …
60Walkie-talkie — A walkie talkie (more formally known as a handheld transceiver) is a hand held, portable, two way radio transceiver. Originally developed for the Canadian government during the Second World War by Canadian Donald L. Hings, similar designs were… …
