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Microsoft introduced its Zune portable music player to compete with Apple's iPod and other devices and has had moderate success. How well does the Zune HD match up with the iconic music player?
The air around you is bursting with radio waves -- and you can tap into them with minimal effort. With a simple radio scanner, all sorts of transmissions are within your earshot. Find out how radio scanners let you listen in on everything from police to astronaut transmissions.