The virtues of a second screen

One of the things Bill Gates raised when describing the way he works -- and that I picked up when I wrote about it -- was the value of having two or (like Bill) three screens. This is something The New York Times has just covered, with Ivan Berger concluding: "Adding a second monitor turned out to be the easiest, most cost-effective and significant improvement in my work since I replaced my modem with high-speed cable."