A J2ME application and a PHP server for managing a shopping list. You can edit the shopping list via web. Once in the store, you download the list to the phone, where you also have a convenient interface for checking and navigating the items.

someone who visits stores in search of articles to buy

a commercial agent who shops at the competitor's store in order to compare their prices and merchandise with those of the store that employs her

a customer of an Service Merchant who has presented a credit card for payment for goods or services

a person who is purchasing things from a store or a number of stores

an individual purchasing products from a merchant's store.