SIGSIM is the Association for Computing Machinery's Special Interest Group on Simulation and Modeling. SIGMOBILE sponsors four annual international conferences: * ACM SIGSIM Conference on Principles of Advanced Discrete Simulation (ACM SIGSIM PADS) * Winter Simulation Conference (WSC) * ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM) * IEEE/ACM International Symposium on Distributed Simulation and Real Time Applications (DS-RT)