This article examines developments in business simulation gaming during the past 40 years. Covered in this article are a brief history of business games, the changing technology employed in the development and use of business games, changes in why business games are adopted and used, changes in how business games are administered, and the current state of business gaming. Readers interested in developments in other areas of simulation gaming (urban planning, social studies, ecology, economics, geography, health, etc.) are encouraged to look at other articles appearing during the 40th anniversary year of "Simulation & Gaming" and at the many fine articles that appeared in the silver anniversary issue of "Simulation & Gaming" (December 1995). (Contains 4 tables.)