IBM, HP Chasing Tag Technology The tech giants are injecting hundreds of millions of dollars into RFID technology, which aims to advance the tracking of items from ho-hum bar codes to smart tags packed with data.   &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2"\ color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/B&gt;&lt;/FONT&gt;