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An electronic ticket is a method of ticket entry, processing, and marketing for companies in the airline, railways and other transport and entertainment industries. Airline ticket [ edit ] E-tickets in the airline industry were devised in about 1994, [1] and have now largely replaced the older multi-layered paper ticketing systems.
A permissive action link ( PAL) is an access control security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of a nuclear weapon. [1] The United States Department of Defense definition is: A device included in or attached to a nuclear weapon system to preclude arming and/or launching until the insertion ...
Fare basis code. A fare basis code (often just referred to as a fare basis) is an alphabetic or alpha-numeric code used by airlines to identify a fare type and allow airline staff and travel agents to find the rules applicable to that fare. Although airlines now set their own fare basis codes, there are some patterns that have evolved over the ...
History Preserved mainframe computer unit of the MARS-1 at the JR East Railway Museum in Saitama, September 2015. MARS-1. The MARS-1 train ticket reservation system was designed and planned in the 1950s by the Japanese National Railways' R&D Institute, now the Railway Technical Research Institute, with the system eventually being produced by Hitachi in 1958.
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Programmable logic device. A simplified PAL device. The programmable elements (shown as a fuse) connect both the true and complemented inputs to the AND gates. These AND gates, also known as product terms, are ORed together to form a sum-of-products logic array. A programmable logic device ( PLD) is an electronic component used to build ...
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