system of exchanges
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System X (telephony) — System X was the name of the UK s first national digital telephone exchange system.HistorySystem X was developed by the UK Post Office (later to become British Telecom), GEC, Plessey, and Standard Telephones and Cables (STC), and first shown in… … Wikipedia
System of Cooperation Among the American Air Forces — SICOFAA emblem Active 1961 Current Country Argentina, Belize … Wikipedia
Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… … Wikipedia
Open system (systems theory) — This article is about systems theory. For other uses, see Open system (disambiguation). Open System Model (basics) An open system is a system which continuously interacts with its environment. The interaction can take the form of information,… … Wikipedia
Emergency power system — Emergency power systems are a type of system, which may include lighting, generators and other apparatus, to provide backup resources in a crisis or when regular systems fail. They find uses in a wide variety of settings from residential homes to … Wikipedia
Thermodynamic system — A thermodynamic system is a precisely defined macroscopic region of the universe, often called a physical system, that is studied using the principles of thermodynamics. All space in the universe outside the thermodynamic system is known as the… … Wikipedia
Director telephone system — The Director System was a system which made it possible to call subscribers at other telephone exchanges without operator intervention in large multi exchange cities, and to have a mixture of automatic and manual exchanges within these cities. It … Wikipedia
Chinese financial system — Beijing Financial Street, the economic centre of Beijing. China s financial system is highly regulated and has recently begun to expand rapidly as monetary policy becomes integral to its overall economic policy. As a result, banks are becoming… … Wikipedia
Community Exchange System — Numismatics Terminology Portal Currency … Wikipedia
Hong Kong Exchanges and Clearing — Infobox Company company name = Hong Kong Exchanges and Clearing Limited company company type = public company foundation = 2000 location city = Central location country = Hong Kong key people = Ronald Arculli (Chairman) industry = Financial… … Wikipedia
