Battiston's application of the model is, well, a little different. He works in complex networks theory, which is the study of interacting systems--from flocks of birds in flight to computers wired through the Internet. To examine the corporate network, Battiston graphed the directors of the Fortune 1000 companies. He started by representing each board member with a point. In a simple world, the graph would look like 1,000 separate islands, each a cluster of points representing the directors who sit on that company's board. But in reality, directors often hold multiple seats. So, when two individuals sit on more than one board together, Battiston draws a line between them. Those directors create, in networkspeak, an interlock graph.