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  2. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes. Calls to the toll-free numbers are charged to the receiving party, and are free to the caller if dialed from land-line telephones, but may incur ...

  3. Area codes in Mexico by code - Wikipedia

    en.wikipedia.org/wiki/Area_codes_in_Mexico_by_code

    800–899: Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas and Veracruz. 800 are used for toll free numbers. 801 numbers used to be for premium-rate telephone numbers (such as 1-900 numbers in the United States) . Nowadays 900 numbers are premium-rate telephone numbers. 900–999

  4. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    The first customer-dialed direct call using an area code was made on November 10, 1951, from Englewood, New Jersey, to Alameda, California. [6] Direct distance dialing (DDD) was introduced subsequently across the country. By the early 1960s, DDD had become commonplace in cities and most towns in the United States and Canada.

  5. Low-voltage differential signaling - Wikipedia

    en.wikipedia.org/wiki/Low-voltage_differential...

    The low common-mode voltage (the average of the voltages on the two wires) of about 1.2 V allows using LVDS with a wide range of integrated circuits with power supply voltages down to 2.5 V or lower. In addition, there are variations of LVDS that use a lower common mode voltage.

  6. Intel X79 - Wikipedia

    en.wikipedia.org/wiki/Intel_X79

    The Intel X79 (codenamed Patsburg) is a Platform Controller Hub (PCH) designed and manufactured by Intel for their LGA 2011 (Socket R) and LGA 2011-1 (Socket R2).. Socket and chipset support CPUs targeted at the high-end desktop (HEDT) and enthusiast segments of the Intel product lineup: Core i7-branded and Xeon-branded processors from the Sandy Bridge and Ivy Bridge CPU architectures.

  7. TI-89 series - Wikipedia

    en.wikipedia.org/wiki/TI-89_series

    With the use of a PC, it is also possible to develop more complex programs in Motorola 68000 assembly language or C, translate them to machine language, and copy them to the calculator. Two software development kits for C programming are available; one is TI Flash Studio, the official TI SDK , and the other is TIGCC, a third-party SDK based on ...

  8. Medical test - Wikipedia

    en.wikipedia.org/wiki/Medical_test

    A medical test is a medical procedure performed to detect, diagnose, or monitor diseases, disease processes, susceptibility, or to determine a course of treatment. Medical tests such as, physical and visual exams, diagnostic imaging, genetic testing, chemical and cellular analysis, relating to clinical chemistry and molecular diagnostics, are typically performed in a medical setting.

  9. H-class battleship proposals - Wikipedia

    en.wikipedia.org/wiki/H-class_battleship_proposals

    The H class was a series of battleship designs for Nazi Germany's Kriegsmarine, which were intended to fulfill the requirements of Plan Z in the late 1930s and early 1940s. . The first variation, "H-39", called for six ships to be built, essentially as enlarged Bismarck-class battleships with 40.6 cm (16 in) guns and diesel propulsi