A paper published online in JEAB (special issue on the topic of on Murray Sidman: A Retrospective Appreciation of a Distinguished Scientist). The purpose of this paper is to provide an overview of the significant work that gave the historical context for Sidman and colleagues’ conceptualization of stimulus equivalence as it was presented in 1982. This article emphasizes the 31 papers and chapters written by Sidman and colleagues that focus on research questions within stimulus control.