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71Royal Observer Corps — Ensign Active 1925–1996 Country …
72History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
73Eagle Mountain Railroad — Infobox SG rail railroad name=Eagle Mountain Railroad logo filename= logo size= marks= locale=Riverside County, California start year=July 29 1948 end year=April 8 1986 old gauge= hq city=The Eagle Mountain Railroad (EMRR) was a California… …
74TXE — TXE, which stands for Telephone eXchange Electronic, was the designation given to a family of telephone exchanges developed by the British General Post Office (GPO), now BT, designed to replace the ageing Strowger systems. When World War II ended …
75Subaru Legacy — Infobox Automobile name = Subaru Legacy aka = Subaru Liberty Subaru B4 Subaru Legacy B4 Subaru Legacy Touring Wagon manufacturer = Subaru predecessor = none parent company = Fuji Heavy Industries production = 1989 present class = Mid size (1989… …
76GPO telephones — The United Kingdom s General Post Office (GPO) had a number of telephones that were provided by them for connection to their exchanges. Until 1982 the GPO had a monopoly on the provision of all telephones within the UK and so the range was… …
77Signals intelligence operational platforms by nation — This article is a subset article under the main article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with current signals… …
78United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …
79No. 503 Squadron RAF — No. 503 (City of Lincoln) Squadron RAF Active 5 October 1926 1 November 1938 Country United Kingdom …
80Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
