ISBNnumeroon
ISBNnumeroon is a Finnish term that translates to "ISBN number" in English. An ISBN, or International Standard Book Number, is a unique numerical identifier for books. It is used by publishers, booksellers, libraries, and other organizations to track books for inventory, ordering, and sales purposes. Each ISBN is assigned to a specific edition and format of a book. For example, a hardcover edition, a paperback edition, and an e-book version of the same title will each have a different ISBN.
The ISBN system was developed in the United Kingdom by David Whitaker in 1965 and adopted internationally