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  2. Telephone numbers in China - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_China

    Those numbers were eventually translated into 1390xx9xxx, where xx were local identifiers. The oldest China Mobile GSM numbers were ten digits long and started with 139 in 1994, the second oldest 138 in 1997, and 137, 136, 135 in 1999. The oldest China Unicom numbers started with 130 in 1995, the second oldest at 131 in 1998. Keeping the same ...

  3. 2024 CrowdStrike incident - Wikipedia

    en.wikipedia.org/wiki/2024_CrowdStrike_incident

    During the morning customers were able to login, but at 12:00 UTC the bank disabled the login button. [154] New Zealand banks ASB and Kiwibank were affected, while Australian banks Westpac [57] and ANZ also had problems. [60] Apps of Australian banks NAB, Westpac, ANZ, Commonwealth Bank, Bendigo Bank, and Suncorp were affected. [5]

  4. Retired number - Wikipedia

    en.wikipedia.org/wiki/Retired_number

    Numbers retired by the Detroit Red Wings of the NHL, displayed at the former Joe Louis Arena in December 2015. Retiring the number of an athlete is an honor a team bestows upon a player, usually after the player has left the team, retires from the sport, or dies, by taking the number formerly worn on his or her uniform out of circulation.

  5. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    On 6 March 1983, the DynaTAC 8000X mobile phone launched on the first US 1G network by Ameritech. It cost $100M to develop, and took over a decade to reach the market. [43] The phone had a talk time of just thirty minutes and took ten hours to charge.

  6. Lists of Billboard number-one singles - Wikipedia

    en.wikipedia.org/wiki/Lists_of_Billboard_number...

    This is a list of songs that have peaked at number one on the Billboard Hot 100 and the magazine's national singles charts that preceded it. Introduced in 1958, the Hot 100 is the pre-eminent singles chart in the United States, currently monitoring the most popular singles in terms of popular radio play, single purchases and online streaming.

  7. Imaginary number - Wikipedia

    en.wikipedia.org/wiki/Imaginary_number

    An imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i 2 = −1. [1] [2] The square of an imaginary number bi is −b 2. For example, 5i is an imaginary number, and its square is −25. The number zero is considered to be both real and imaginary. [3]

  8. 112 (emergency telephone number) - Wikipedia

    en.wikipedia.org/wiki/112_(emergency_telephone...

    112 (emergency telephone number) Operator in Kraków responding to a 112 phone call 112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones and, in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police).

  9. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted F n . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes (as did Fibonacci ...