High-tech tags help retailers track it down

Most shoppers likely never notice them. But those tiny radio-frequency identification, or RFID, tags are what help some retailers accurately promise you that the sweater you're eyeing online is in stock at your local store and, when you fail to find it on the rack, track it down in an abandoned dressing room pile. The technology isn't cheap. But retail industry experts say the potential to bring some perks of online shopping to brick-and-mortar stores while making it easier to keep up with impatient, time-pressed customers is convincing more companies the tiny tags are worth it.