Chapters: 1: Introduction 2: Simple example 3: Invocation 4: Finer Control 5: X-Y Plots 6: Contour Plots 7: Image Plots 8: Examples 9: Gri Commands 10: Programming 11: Environment 12: Emacs Mode 13: History 14: Installation 15: Gri Bugs 16: Test Suite 17: Gri in Press 18: Acknowledgments 19: License Indices: Concepts Commands Variables | # 18: Acknowledgments Over the years, many Gri users have been kind enough to help in its development. Some have done so by sending in bug reports, others by requesting features, others by submitting patches. A few of their names are: Ivo Alxneit, Karin Bryan, Sara Bennett, Luke Blaikie, Dave Brickman, Steve Cayford, Clyde Clements, Andrew Collier, Pierre Flament, Peter Galbraith, Dave Hebert, David A. Holland, Christopher Illies, Cody Kirkpatrick, Thomas Larsen, Alejandro López-Valencia, Kawamura Masao, Steve Matheson, Brian May, Ed Nather, Roman Neuhauser, Carl Osterwisch, Richard Andrew Miles Outerbridge, Tim Powers, Jinyu Sheng, Toru Suzuki, Keith Thompson, David Trueman, Wolfgang Voegeli, Jeff Whitaker, and George White. Prime among these is Peter Galbraith, who has been a close collaborator in Gri development and in my scientific work, for two (!) decades. To all, thanks.