Retailers are excited about radio-frequency identification tags (RFID), which many are studying as a way to track inventory. With RFID tags, your refrigerator can alert you if the milk is getting old, or you can use your cell phone while at the grocery to dial into your computer and check which items in the cupboard need replenishing.Many of these ideas have been around for years but have made little headway. Why? According to some manufacturers, it’s because, when it comes to the kitchen, the folks who hold the purse strings are those who carry purses: women. “Teenage boys and early-adopter men will put up with a lot of crap in setting up new technology. Women will not,” says Tim Woods, president of the Internet Home Alliance.