A method of processing a transaction includes receiving a site location code. Site configuration information corresponding to the received site location code is received from a database. That information includes more product record(s), each corresponding to a reservable product or a non-reservable product. A selection of one or more of the product records in the retrieved information is received. If any selected product record corresponds to a reservable product, a reservation command is produced. That command requests reservation of selected reservable product(s). A method of selecting a product includes receiving a location input and determining a site location code with it. The site location code is transmitted and one or more product records are received. Representations of one or more of the received product records are presented and a selection of products is received. An indication of the selection is transmitted.