9781839766220, What does this Number Mean?

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The number “9781839766220” is an International Standard Book Number (ISBN), a unique identifier for books. Here’s a detailed breakdown of what this number means:

Understanding the ISBN

  1. What is an ISBN?:
    • International Standard Book Number: An ISBN is a unique numeric commercial book identifier assigned to each edition and variation (except reprints) of a book.
    • 13-Digit Format: Since 2007, ISBNs have been 13 digits long. Previously, they were 10 digits long.

Breakdown of the ISBN “9781839766220”

  1. Structure of a 13-Digit ISBN:
    • Prefix Element (978 or 979): The first three digits, either 978 or 979, are the prefix element. These digits are used to distinguish the ISBN format.
    • Registration Group Element: The next segment identifies the country, geographical region, or language area participating in the ISBN system.
    • Registrant Element: This part identifies the publisher or imprint.
    • Publication Element: This segment identifies the specific edition and format of the book.
    • Check Digit: The last digit is a check digit used to validate the ISBN.
  2. Applying the Breakdown to 9781839766220:
    • 978: This is the prefix element, indicating the ISBN format.
    • 1: This number indicates the language group, with “1” representing English-speaking countries.
    • 8397: This sequence is likely the registrant element, identifying the specific publisher.
    • 6622: This sequence identifies the specific title or edition of the book.
    • 0: The check digit ensures that the ISBN is correctly formatted and valid.

Practical Use

  1. How to Use an ISBN:
    • Searching for a Book: You can use the ISBN to search for a book in databases, libraries, and online bookstores.
    • Book Identification: The ISBN uniquely identifies a specific book, edition, and publisher, making it easier to find and reference.

Example

  1. Look Up the ISBN:
    • You can enter “9781839766220” into an ISBN search tool or a library database to find detailed information about the book it represents.

Conclusion

The number “9781839766220” is an ISBN, a standardized identifier for books, which helps in identifying, cataloging, and purchasing books. By breaking down the number, you can understand more about the book’s publisher, language, and specific edition.

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