During the International Magnetospheric Study (IMS), a vast data set was acquired which is presently being brought to bear on solving some of the outstanding questions regarding magnetospheric dynamics. The data involve plasma and field parameters measured on satellites both in the magnetosphere and in the interplanetary medium, as well as ground-based magnetometer, riometer, and photometer array measurements which can be used to diagnose the state of magnetospheric activity. The data acquisition phase of the IMS concluded at the end of 1979, although some instruments are operating to this day. Since the end of 1979 an intensive effort has been underway to analyze and interpret the data base, and some of the successes of this effort were recently reported in the Symposium on the Achievements of the IMS, which was held in late June in Graz, Austria.