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  2. Telephone number - Wikipedia

    en.wikipedia.org/wiki/Telephone_number

    For example, a telephone number in North America consists of a three-digit area code, a three-digit central office code, and four digits for the line number. If the numbering plan area does not use an overlay plan with multiple area codes, or if the provider allows it for other technical reasons, seven-digit dialing may be permissible for calls ...

  3. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, which facilitate wider software, internet (including web browsing over mobile broadband), and multimedia functionality (including music, video, cameras, and ...

  4. Barack Obama - Wikipedia

    en.wikipedia.org/wiki/Barack_Obama

    The number of American soldiers in Afghanistan fell dramatically during Obama's second term, though U.S. soldiers remained in Afghanistan throughout Obama's presidency. Obama left office on January 20, 2017, and continues to reside in Washington, D.C. His presidential library in Chicago began construction in 2021.

  5. List of U.S. states and territories by population - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    The accuracy of this count is then tested after the fact, and sometimes statistically significant undercounts or overcounts occur. For example for the 2020 decennial census, 14 states had significant miscounts ranging from 1.5% to 6.6%. While these adjustments may be reflected in government programs over the following decade, the 10-year ...

  6. Empty string - Wikipedia

    en.wikipedia.org/wiki/Empty_string

    Since the empty string does not have a standard visual representation outside of formal language theory, the number zero is traditionally represented by a single decimal digit 0 instead. Zero-filled memory area, interpreted as a null-terminated string, is an empty string. Empty lines of text show the empty string.

  7. National identification number - Wikipedia

    en.wikipedia.org/wiki/National_identification_number

    The individual number and the check digits are collectively known as the Personal Number. The individual number has been selected from a range depending on century of birth: for the years 1854–1899 the range is 500–749, for the years 1900–1999 the range is 000–499, for the years 2000–2039 the range is 500–999.

  8. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    For example, (234) 235-5678 is a valid telephone number; with area code 234, central office prefix (exchange) 235, and line number 5678. The number (234) 911-5678 is invalid, because the central office code must not be in the form N11. (314) 159-2653 is invalid, because the office code must not begin with 1.

  9. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    For example, the old style IMEI code 35-209900-176148-1 or IMEISV code 35-209900-176148-23 tells us the following: TAC: 35-2099 - issued by the BABT (code 35) with the allocation number 2099 FAC: 00 - indicating the phone was made during the transition period when FACs were being removed. SNR: 176148 - uniquely identifying a unit of this model