The report presents the underlying software architecture and rationale of the Generalized Management Information System (GMIS), along with a sample demonstration (an energy analysis problem) of its characteristics and a summary of topics of continuing research. The field-tested experimental system has the following features: It allows on-line interactive data management as well as a batch facility; allows for storgage of large quantities of various types of data; and allows the changing of data, addition of new data series, and modification of tables. It gives the user a simple and consistent view of the way data is stored in the system, permits several users to select and access data according to many criteria, allows for easy viewing of data, and contains facilities for validation of data. The system provides facilities to interactively change data protection, is able to store data about data, provides a mechanism for assuring the integrity of the data, and provides mechanisms for monitoring and tuning performance. The system provides the user with an efficient, flexible environment to specify, construct, and execute statistical analyses and model studies, and to produce the associated plots and reports. (GMIS is being exercised for MISOE application.) (Author/AJ)