International Standard Book Number (ISBN) (Occasionally spoken like this : [ɪzbən] ) or international standard book number is a unique numbering method used to identify barcodes of all books that are used commercially. In 1966 this numbering system was introduced in the United Kingdom. UK seller of books and stationery items built to WHO Smith . At first it was the number of digits, and the primary name was Standard Book Numbering (SBN). This trend continued till 1974 . In 1970 AD, the International Organization for StandardizationThis gives international recognition; And its standard form is determined by ISO 2108 . Another numbering method is the ISSN, which is used primarily for newspapers and magazines. Since January 1 , 2007 , ISBN has been upgraded to a 13-digit number. [1] The numbering of bearing responsibility: TC 46 / SC 9 . In the late half of the 1990s, ISBN was introduced in the publishing industry in Bangladesh. The National Book Center of Bangladesh alloted an index for each publishing company on which the publishing agency has an international numbering of its published books. This number is printed on the books of the book.