System (GIMMS) software from 1969. He returned to the University of Edinburgh and this software was sold commercially from 1973. By 1977 it was used at 300 sites worldwide. This can be considered the first globally used GIS which anticipated some key characteristics of the Harvard Odyssey system by nearly five years and ARC/INFO by a decade.

By the late 1970s, two public domain GIS systems (MOSS and GRASS GIS)