International Standard Book Number in 1965, has – 340 indicating the publisher, 01381 their serial number, and 8 being the check digit. This can be converted to ; the check digit does not need to be re-calculated. Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" European Article Number EAN-13s. An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January
Number 13-class battleship attendees at the conference agreed to limit capital ship construction for the next decade and scrapped large numbers of existing ships as well as many ships still under construction. Japan suspended the "Number 13" class while the conference was in progress before any ship was laid down and formally cancelled them on 19 November 1923. As construction of the ships was scheduled to begin in 1922, and completed by 1927, they were already allocated to specific shipyards: Number 13-class battleship The "Number 13"-class battleship was a planned class of four fast battleships to be built for the Imperial Japanese Navy