electrically switched network
61Western Electric — Infobox Defunct Company company name = Western Electric Co., Inc. company fate = Absorption successor = AT T Technologies foundation = 1872 defunct = 1995 location = New York, NY, USA industry = Telecommunications key people = products = Customer …
62Prague pneumatic post — The Prague pneumatic post (Czech: Pražská potrubní pošta) is the world s last preserved municipal pneumatic post system. [Wertheim, Margaret. [http://www.newscientist.com/article/mg16422095.000 bones to phones.html Bones to phones] , New… …
63telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… …
64Dual gauge — Track gauge by size Broad gauge Sta …
65Richmond, Virginia — This article is about the city of Richmond. For Richmond County, which is 53 miles (85 km) away and unrelated to the city, see Richmond County, Virginia. City of Richmond   City   …
66SRI International — SRI International, based in the United States, is one of the world s largest contract research institutes. It was founded as Stanford Research Institute in 1946 by the trustees of Stanford University as a center of innovation to support economic… …
67Electricity meter — Typical North American domestic analog electricity meter …
68History of television — The Television technology can be divided along two lines: those developments that depended upon both mechanical and electronic principles, and those dependent only on electronic principles. From the latter descended all modern televisions, but… …
69Brihanmumbai Electric Supply and Transport — Infobox Company company name = BEST Undertaking company company type = Autonomous State owned enterprise company slogan = Safety is our motto... foundation = Mumbai (1873) location = Mumbai, India key people = Uttam Khobragade, General Manager… …
70Copper wire and cable — Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.[1][2] The invention of the telephone in 1876 proved to be another early boon for copper wire.[3] Today, despite competition from… …
