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  2. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    Processor read/write scratch memory (called CALL STORE) was implemented using a magnetic core variant called Ferrite Sheet. Program and Data Store (used to store Software and infrequently changed data) was implemented using a technology called piggy back twistor - in modern parlance a write once, read many times non-volatile memory system).

  3. Electrical resistivity and conductivity - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistivity_and...

    [1] [2] [3] For example, if a 1 m 3 solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m. Electrical conductivity (or specific conductance) is the reciprocal of electrical resistivity. It represents a material's ability to conduct ...

  4. North County Transit District - Wikipedia

    en.wikipedia.org/wiki/North_County_Transit_District

    The North County Transit District (NCTD) is the agency responsible for public transportation in Northern San Diego County, California.The agency manages the COASTER commuter rail service between Oceanside and San Diego, the SPRINTER hybrid rail service between Escondido and Oceanside, the BREEZE transit bus service, LIFT paratransit service, and FLEX on-demand and point-deviation service.

  5. History of radiation protection - Wikipedia

    en.wikipedia.org/wiki/History_of_radiation...

    Unprotected experiments in the U.S. in 1896 with an early X-ray tube (Crookes tube), when the dangers of radiation were largely unknown.[1]The history of radiation protection begins at the turn of the 19th and 20th centuries with the realization that ionizing radiation from natural and artificial sources can have harmful effects on living organisms.

  6. British Rail Class 323 - Wikipedia

    en.wikipedia.org/wiki/British_Rail_Class_323

    The British Rail Class 323 is a class of electric multiple unit (EMU) passenger train built by Hunslet Transportation Projects and Holec. All 43 units were built from 1992 through to 1995, [5] although mockups and prototypes were built and tested in 1990 and 1991.

  7. Capitol Corridor - Wikipedia

    en.wikipedia.org/wiki/Capitol_Corridor

    The Capitol Corridor and San Joaquins share a combined fleet of 13 EMD F59PHI and ten Siemens Charger SC-44 locomotives. [36] The Charger locomotives meet EPA Tier IV emission standards and are capable of operating at 125 mph in revenue service. [36] Many of the F59PHI have been re-engined to meet more stringent EPA Tier II emission standards. [37]

  8. ABB - Wikipedia

    en.wikipedia.org/wiki/ABB

    ABB Group [6] is a Swedish-Swiss [7] [8] [9] multinational electrical engineering corporation. Incorporated in Switzerland as ABB Ltd., and headquartered in Zurich, [1] it is dual-listed on the SIX Swiss Exchange in Zurich and the Nasdaq Nordic exchange in Stockholm, Sweden, in addition to OTC Markets Group's pink sheets in the United States. [10]

  9. Flexity Outlook (Toronto) - Wikipedia

    en.wikipedia.org/wiki/Flexity_Outlook_(Toronto)

    The Flexity Outlook is the latest model of streetcar in the rolling stock of the Toronto streetcar system owned by the Toronto Transit Commission (TTC). Based on the Bombardier Flexity, they were first ordered in 2009 and were built by Bombardier Transportation in Thunder Bay and Kingston, Ontario, with specific modifications for Toronto, such as unidirectional operation and the ability to ...