Sony said it plans to start selling <A HREF="http://www.cnn.com/2006/TECH/ptech/11/02/sony.light.notebook.reut/index.html">the world's lightest notebook computer</A> in December in Japan, in a bid to boost its presence among business users. Weighing 898 grams, Sony's "type G" Vaio computer will be the lightest laptop PC, and comes with a 12.1-inch liquid crystal display screen.