Geographical Analysis Machine (GAM) Mark 1 history
GAM/1 developed in the mid 1980s
it was very computationally intensive hence the term MACHINE because it really needed a dedicated computing machine
Early runs took over 1 month of CPU time on a large Mainframe (Amdahl 580)
Later ran on a Cray X-MP, Y-MP, and Cray 2 super computers