【答案解析】RFID, radio-frequency identification, is a tagging system that suddenly became famous in 2003 when Wal-Mart demanded that its 100 biggest suppliers adopt it. But according to Bain's survey, so far only 13% of the firms surveyed adopt this technology. But Wal-Mart's suppliers have invested $ 250m in the tags and readers required by the system because they do not want to lose Wal-Mart as a customer, and a significant proportion of those are extremely satisfied with the results. RFID is expected to become a more important concern for more companies.