If you want the book to be categorized, either by a bookseller or a library, it has to be assigned a unique numerical code, like an ISBN, for International Standard book Number.
The ISIN code is a 12-character alpha-numerical code that serves for uniform identification of a security at trading and settlement.
Translated data form surveys into numerical code for data entry.
unit numerical code
Protected 5-unit numerical code for telegram service
Shenzhen Huaxing electron sold to be established in 2000, was one is engaged in the numerical code, the board card research and development, the production and the sales carrier provider.
As far as I know the match abundant numerical code square is a digital product chain-like marketing platform has the branch store in the domestic many places.
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