Preface. Section 1: Conceptual Aspects. Systems Engineering for Risk Management; A.P. Sage. Computer Supported Risk Management: Between Scylla and Charybdis; E. Hollnagel. Designing Risk and Environmental Management Support Systems; P. Haastrup. Modeling Human-Machine Systems: a Challenge for Systems Analysis; B. Wahlström. Section 2: Planning and Policy Analysis. Contingency Planning Using Expert Judgment in a Group Decision Support Center Environment; J.R. Harrald. GIS-Based Environmental Equity Analysis -- a Case Study of TRI Facilities in the Pittsburgh Area; T.S. Glickman, D. Golding, R. Hersh. Transportation Hazard Analysis in an Integrated GIS Environment; M. Lepofsky, M. Abkowitz, P. Cheng. GIS Applications in Emergency Management; G.O. Johnson. Section 3: Operational Decision Making. On-Line Nuclear Power Reactor Accident Monitoring; M.C. Parker, J.L. Brittin, F. Niziolek. Decision-Support Integration-Platform for Major Emergency Management; Y. Shavit. Integrating Geographic Information Systems and Telecommunications Technology to Deliver Public Safety Warnings; G.J. Hunter. Decision Support for Real-Time Management of Hazardous Operations; G.E.G. Beroggi, W.A. Wallace. Section 4: Commercial Applications. Integrated Information Systems for Technological Risk Assessment; K. Fedra, E. Weigkricht. Environmental Decision Support System for Air Quality Risk Assessment and Innovation Investment in Large Industrial Complexes and Energy Production Systems; A.V. Gheorghe, V. Litwin, S. Golovanov. Computer Models Used to Support Cleanup Decision Making at Hazardous and Radioactive Waste Sites; P.D. Moskowitz, M.P. DePhillips, A.F. Meinhold, B. Irla. Environmental Modeling Software at the U.S. Protection Agency's Center for Exposure Assessment Modeling; D.C. Bouchard, R.B. Ambrose Jr., T.O. Barnwell Jr., D.W. Disney. Index.