Welcome to the Commemorative Issue of SPICE [Editor's Note]

This commemorative issue is graciously edited by Guest Editor Larry Nagel, with advice and input from Prof. David Hodges. In this issue, we are proud to feature original articles about the origin and impact of SPICE. We hope that you will enjoy reading all of these articles, and we are grateful to our expert authors for writing the articles that appear in this issue. I thank Dr. Nagel for serving as guest editor for this issue and Prof. Hodges for his advice and coordination with Dr. Nagel.