• Half a century ago, management guru Peter Drucker introduced the concept of the knowledge worker. Today his grandson, Nova Spivack, is trying to turn their knowledge into something more than the sum of the parts and boost their collective intelligence. Spivack is founder and CEO of Radar Networks, which recently launched Twine, which bills itself as the first consumer Semantic Web application. Twine has raised more than $20 million from some big names in the venture capital world, including Velocity Interactive Group, Vulcan and DFJ.

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