Heartfelt gratitude is extended to Shelley Goldman, Jim Greeno, Brigitte Jordan, Ted Kahn, Charlotte Linde, and the staff at IRL for their generous support and stimulating ideas. We thank Tom Bailey, David Belkin, Charles Goodwin, Clifford Hill, Franklin Horowitz, Eric Larson, and Hervé Varenne for helpful comments on earlier versions of the paper.
We are deeply indebted to Ted Kahn of IRL for introducing us to the circuit-board manufacturing company and most especially to the employees and management for opening their doors to this research and for teaching us about their work.
Finally, we thank Professor Suu Nguyen and Mr. Hung Le, who not only provided the Vietnamese transcriptions and translations, but also helped clarify meanings for us.
