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  2. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    The final character of a ten-digit International Standard Book Number is a check digit computed so that multiplying each digit by its position in the number (counting from the right) and taking the sum of these products modulo 11 is 0. The digit the farthest to the right (which is multiplied by 1) is the check digit, chosen to make the sum correct.

  3. Telephone number verification - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_verification

    A JavaScript function can check to see if a phone number is a valid format, i.e., is numeric, starts with a valid set of numbers ("0" for local, or an international dialing prefix followed by a valid country code and is not too short to be a phone number. At first a JavaScript function is used to clear out any spacer characters.

  4. ISBN - Wikipedia

    en.wikipedia.org/wiki/ISBN

    [c] [3] An International Standard Book Number consists of four parts (if it is a 10-digit ISBN) or five parts (for a 13-digit ISBN). Section 5 of the International ISBN Agency's official user manual [16]: 11 describes the structure of the 13-digit ISBN, as follows: The parts of a 10-digit ISBN and the corresponding EAN‑13 and barcode.

  5. Raja Rammohun Roy National Agency for ISBN - Wikipedia

    en.wikipedia.org/wiki/Raja_Rammohun_Roy_National...

    Raja Rammohun Roy National Agency for ISBN is an Indian government agency which is the only ISBN agency which run under Ministry of Education, Government of India. [1] It was founded in January 1985 [2] to facilitate authors and publishers to register for ISBN in India. [3] It gives free ISBN to Indian citizens.

  6. List of ISBN registration groups - Wikipedia

    en.wikipedia.org/wiki/List_of_ISBN_registration...

    List of ISBN registration groups. The registration group or identifier group is the second element in a 13-digit ISBN (first element in a 10-digit ISBN) and indicates the country, geographic region, or language area where a book was published. [ 1] The element ranges from one to five numerical digits.

  7. ISSN - Wikipedia

    en.wikipedia.org/wiki/ISSN

    An ISBN might be assigned for particular issues of a serial, in addition to the ISSN code for the serial as a whole. An ISSN, unlike the ISBN code, is an anonymous identifier associated with a serial title, containing no information as to the publisher or its location. For this reason a new ISSN is assigned to a serial each time it undergoes a ...

  8. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  9. Amazon Standard Identification Number - Wikipedia

    en.wikipedia.org/wiki/Amazon_Standard...

    An Amazon Standard Identification Number ( ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com and its partners for product identification within the Amazon organization. [1] They were designed in 1996 by Rebecca Allen, an Amazon software engineer, when it became clear that Amazon was going to sell products other than ...