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  2. World Trade Center (1973–2001) - Wikipedia

    en.wikipedia.org/wiki/World_Trade_Center_(1973...

    Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently. This increased the amount of usable space on each floor from 62 to 75 percent by reducing the number of elevator shafts. [55] Altogether, the World Trade Center had 95 express and local elevators. [56]

  3. Mobile telephone numbering in India - Wikipedia

    en.wikipedia.org/wiki/Mobile_telephone_numbering...

    In India, mobile numbers (including pagers) on GSM, WCDMA, LTE and NR networks start with either 9, 8, 7 or 6.Each telecom circle is allowed to have multiple private operators; earlier it was two private + BSNL/MTNL, subsequently it changed to three private + BSNL/MTNL in GSM; now each telecom circle has all four operators including Reliance Jio, Bharti Airtel, Vodafone idea ltd and BSNL/MTNL.

  4. Telephone numbers in Italy - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Italy

    Until 2001 a leading "0" was part of any mobile phone number, but it has been removed. [14] Example for calling the mobile phone number 3xx xxxxxxx: 03xx xxxxxxx: from within Italy, before 2001; 3xx xxxxxxx: from within Italy, after 2001; +39 3xx xxxxxxx: from abroad, both before and after 2001.

  5. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    Individual mobile phone companies are allocated different ranges within the 073xx, 074xx, 075xx, 07624, 077xx, 078xx and 079xx area codes. Changes to mobile phone numbers in the Big Number Change were mostly straight replacements, such as Vodafone customers on the 0378 block became 07778.

  6. American Airlines - Wikipedia

    en.wikipedia.org/wiki/American_Airlines

    Seats range from 17–18.5 inches (43–47 cm) in width and have 30–32 inches (76–81 cm) of pitch. American markets a number of rows within the main cabin immediately behind Main Cabin Extra as "Main Cabin Preferred", which require an extra charge to select for those without status. [117]

  7. Virtual number - Wikipedia

    en.wikipedia.org/wiki/Virtual_number

    These are also called a follow-me number, a virtual telephone number or (in the UK) Personal Number. [ 1 ] Usually a virtual telephone number can be set to forward calls to different telephone numbers depending on the time of day and the day of the week using time of day routing; [ 2 ] for example, between 9 and 5 on working days incoming calls ...

  8. 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]

  9. 999 (emergency telephone number) - Wikipedia

    en.wikipedia.org/wiki/999_(emergency_telephone...

    An emergency phone on the Welsh coast at Trefor featuring 999. (Note the keypad missing digits 4 - 0, with no instruction on how to dial 999 from this phone.) 999 is the official emergency number for the United Kingdom, but calls are also accepted on the European Union emergency number, 112.