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  2. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    The number contains the information necessary to identify the intended endpoint for a telephone call. Many countries use fixed-length numbers in a so-called closed numbering plan. [5] A prominent system of this type is the North American Numbering Plan. In Europe, the development of open numbering plans was more prevalent, in which a telephone number comprised a varying count of digits ...

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's. Country codes are dialed before the national telephone number, but require at least one additional prefix, the international call prefix which is an exit code from the national numbering plan to the international one. In ...

  4. Circuit breaker design pattern - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker_design_pattern

    Circuit breaker is a design pattern used in software development. It is used to detect failures and encapsulates the logic of preventing a failure from constantly recurring, during maintenance, temporary external system failure or unexpected system difficulties. Circuit breaker pattern prevents cascading failures particularly in distributed systems. [1]

  5. New York Stock Exchange - Wikipedia

    en.wikipedia.org/wiki/New_York_Stock_Exchange

    The invention of the electrical telegraph consolidated markets and New York's market rose to dominance over Philadelphia after weathering some market panics better than other alternatives. [10] The Open Board of Stock Brokers was established in 1864 as a competitor to the NYSE. With 354 members, the Open Board of Stock Brokers rivaled the NYSE in membership (which had 533) "because it used a ...

  6. Telephone numbers in Slovakia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Slovakia

    Telephone numbers in Slovakia. This page details the format and usage of telephone numbers in Slovakia. Today, Slovakia uses a closed numbering plan with area codes beginning with 0. After 0, there is usually a 2-digit prefix, followed by a 7-digit subscriber number. The capital, Bratislava, has one-digit prefix and an 8-digit subscriber number ...

  7. Fault tolerance - Wikipedia

    en.wikipedia.org/wiki/Fault_tolerance

    Fault tolerance is the ability of a system to maintain proper operation in the event of failures or faults in one or more of its components. Any decrease in operating quality is proportional to the severity of the failure, unlike a naively designed system in which even a small failure can lead to total breakdown. Fault tolerance is particularly sought after in high-availability, mission ...

  8. Uptick rule - Wikipedia

    en.wikipedia.org/wiki/Uptick_rule

    The uptick rule is a trading restriction that states that short selling a stock is allowed only on an uptick. For the rule to be satisfied, the short must be either at a price above the last traded price of the security, or at the last traded price when the most recent movement between traded prices was upward (i.e. the security has traded below the last-traded price more recently than above ...

  9. Zinsco - Wikipedia

    en.wikipedia.org/wiki/Zinsco

    Zinsco would remain with copper in both their panels and breakers until the third major copper shortage in the early 1960s, when they would switch to an aluminum bus. In 1963, Zinsco introduced the R-38 twin breaker, which was the only twin circuit breaker that also made contact on both bus-bars for 240 volts in a single breaker space.

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