PROBLEM TO BE SOLVED: To improve reliability of a recommended brand list directed to bookstores.;SOLUTION: A bookstore information centralized management system, when selecting a book B as a recommended brand to a bookstore A, checks a back-order database of the bookstore A, when C copies of the book B are recorded as back-order, regards that there are C copies of the book B in the bookstore A as an inventory, and calculates the deficient number of the book B. The bookstore information centralized management system, when receiving order data from a bookstore system of the bookstore A for ordering E copies of book D, checks a recommended brand list for the bookstore A, and when the book D is recorded as a recommended brand, subtracts E copies of the book D from the deficient number of the book D in the recommended brand list for the bookstore A.;COPYRIGHT: (C)2014,JPO&INPIT
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