ISBN is the registration and approval number of each book. This number is unique and fixed. To publish a book, a publishing house must obtain the book number, which is recorded in the national special management computer system. The ISBN is in the form of:

7-* * *-* * (this format conforms to international standards)

Among them: 7 (China all starts with 7) The last three digits of the country are the code of the publishing house, and the last few digits are the book number of the book! So if you want to look for books in the bookstore, remember the book number, that's right.

The book number is the seven digits on the bar code of each book. The bar code may be on the cover, or it may be on the last page or the first few pages of the book. The position of the book number is not fixed now. Anyway, you can definitely find it in the first or last pages of the book. Some books are really old and were published before the format of the new book number was set, so their book number is not in the table above.

As for the book's index number: the first few digits, such as 7-102-then you can find all the books of People's Fine Arts Publishing House in this bookstore. If you can't remember the title or book number, remember that the publishing house can also check whether there is this book.

Because as mentioned above, the 7- last three digits are the number of the publishing house (unique and fixed).

I don't know if your question is aimed at finding books. I hope I can help you _