interrupted signalling current
1Invention of the telephone — The modern telephone is the result of work done by many people, all worthy of recognition of their contributions to the field. Alexander Graham Bell was the first to patent the telephone, an apparatus for transmitting vocal or other sounds… …
2Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
3Milan–Bologna railway — The long steel girder bridge over the Po River at its opening in 1854 beside the temporary wooden bridge The Milan–Bologna railway is the northern part of the traditional main north south trunk line of the Italian railway network. It closely… …
4Level crossing — This article is about at grade intersections between railway and road. For where two rail lines cross, see level junction. For a type of nuclear receptor (RXR), see Retinoid X receptor. A level crossing at Chertsey, England, as the barriers rise …
5Telephone — The telephone (from the el. τῆλε, tēle , far and φωνή, phōnē , voice ) is a telecommunications device that is used to transmit and receive sound (most commonly speech), usually two people conversing but occasionally three or more. It is one of… …
6Paris Métro Line 14 — Line 14 Year opened 1998 Last extension 2007 Rolling stock MP 89 6 carriages per trainset Stations served 9 Terminal stations …
7Morse code — Chart of the Morse code letters and numerals Morse code is a method of transmitting textual information as a series of on off tones, lights, or clicks that can …
8Central Organization for Railway Electrification — केन्द्रीय रेल विद्युतीकरण संगठन, Central Organization for Railway Electrification Type Government Owned Industry Railways and Locomotives …
9Formula One — F1 redirects here. For other uses, see F1 (disambiguation). For other uses, see Formula One (disambiguation). Formula One Category Single seater Country or region Worldwide …
10ITV Sport — Type Sports coverage Genre Sport Predecessor Granada Sport; Carlton Sport; ISN (London News Network) …
