# Acknowledgments

SimPy 2 has been primarily developed by Stefan Scherfke and Ontje Lünsdorf, starting from SimPy 1.9. Their work has resulted in a most elegant combination of an object oriented API with the existing API, maintaining full backward compatibility. It has been quite easy to integrate their product into the existing SimPy code and documentation environment.

Thanks, guys, for this great job! SimPy 2.0 is dedicated to you!

SimPy was originally created by Klaus Müller and Tony Vignaux. They pushed its development for several years and built the SimPy community. Without them, there would be no SimPy 3.

Thanks, guys, for this great job! SimPy 3.0 is dedicated to you!

The many contributions of the SimPy user and developer communities are of course also gratefully acknowledged.