Synopsis: Proceedings of a May 1999 workshop, with papers on conservative simulation techniques, scheduling and synchronization, future directions, defense simulation and DIS, optimistic simulation techniques, performance prediction and analysis, and simulation and computer networks. Topics include efficient parallel simulation using reverse computation, performance prediction tools for parallel discrete-event simulation, Time Warp simulation on clumps, and active network management protocol. No index. Annotation c. Book News, Inc., Portland, OR (booknews.com)