TAG YOUR IT

Remember having to fumble around for a blank tape when a song you liked came on the radio? Those days -- like the audio cassette itself -- are over. Soon, if you want a copy of a song you're listening to on the radio, all you'll have to do is push a button. The nation's largest broadcasters, including San Antonio, Texas-based Clear Channel Communications, have teamed with Apple and a pair of digital radio manufacturers to introduce tagging -- a feature that lets listeners mark a song they hear for purchase from iTunes.