9. Acknowledgments

This work could not have been done without the greatly appreciated support of the University of Maryland Human-Computer Interaction Lab, Grasshopper Group, Sun Microsystems, and NCR Corporation.

Many thanks to Owen Densmore, Hugh Daniel, Mike Gallaher, John Gilmore, James Gosling, Marja Koivunen, David LaVallee, Julia Menapace, Rehmi Post, Brian Raymor, Glenn Reid, David Rosenthal, Robin Schaufler, Ben Shneiderman, Josh Siegel, Stan Switzer, and Martha Zimet, people who gave me much valuable advice, encouragement, feedback, and lots of neat ideas.

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