Book purchasing system with filters and continuous loop execution

摘要

A book purchasing system allows a book buyer to log onto the system via a Web interface and purchase books from one or more book-selling venues. The buyer enters information on the books he wants to purchase and criteria relating to the purchases. The system searches the venues for listings matching this information. The listings are filtered using the other criteria entered by the buyer. These filtered listings may be displayed to the buyer and the buyer may then select which listings to execute to meet his purchasing needs. Once selected, the buyer can execute the listings at the venue. The system may automatically complete the transactions at the venues on behalf of the buyer. The system may continuously search the venues for listings that match the buyer criteria and will continue searching until listings are identified or the buyer manually stops the search.