ABSTRACTDr George L. Mallen writes about his introduction to computer simulation in the early 1960s and his work with Gordon Pask, founder and director of System Research Ltd, a convergence point of cognitive science, computer technology and art. In 1969 Mallen co-founded the Computer Arts Society and helped to organize Event One at the Royal College of Art which brought computers into the art school. In 1969 he formed System Simulation Ltd and in 1970 developed ECOGAME, a system dynamics model of a hypothetical national economy, implemented at the First European Management Forum, the predecessor of the World Management Forum. Some of the ECOGAME technology was also used by Stafford Beer for the government economic decision room he designed and implemented for the Allende government in Chile in 1972–1973.