The nation 's largest retailer has told its 100 top suppliers they have to start using electronic tags on all pallets of goods by Jan. 25 , 2005 .
Wal-Mart has told its top 100 suppliers that they 'll need to have radio-frequency ID systems in place for tracking pallets of goods through the supply chain by Jan. 25 , 2005 .
data that exists (for example, in a database) before a test is executed, and that affects or is affected by the component or system under test.