New 12-inch PowerBook is a lightweight Summary: At Macworld in San Francisco, CEO Steve Jobs unveils a new, compact version of the PowerBook that weighs less than 5 pounds. January 7, 2003 -- 20:56 GMT (12:56 PST) Loading... Please wait. Topics: Laptops, Mobility Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.