Paul Kahn is an information designer and author whose engagement with visualization of large knowledge structures began with hypertext research at Brown University in the 1980s. Throughout his career he has specialized in visual techniques for describing information. He led Dynamic Diagrams in Providence Rhode Island, Kahn+Associates in France, and was Experience Design Director at Mad*Pow in Boston. His teaching included the Information Design and Data Visualization program at Northeastern University; Docent at Media Lab, Aalto University; and instructor in information architecture at several digital media programs in Paris.