I would like to acknowledge the people who have made a direct impact on the Diffcalc project, knowingly or not, in terms of encouragement, suggestions, criticism, bug reports, code contributions, and related projects. Names are ordered alphabetically by surname. .. If you add new entries, keep the list sorted by surname! .. acks:: * Allesandro Bombardi * Mark Booth * W. R. Busing * Steve Collins * H. A. Levy * Martin Lohmier * Chris Nicklin * Elias Vlieg --- writer of DIF software used as a model for Diffcalc * Robert Walton * H. You Thank you! Rob Walton