Complex system simulations (look up Net Logo). Distributed, fault-tolerant data processing systems. The latter is harder to back up, because all real-life "agen

Complex system simulations (look up Net Logo). Distributed, fault-tolerant data processing systems. The latter is harder to back up, because all real-life "agent" systems I've worked with are rough approximations of "agents" made with commonplace technologies and don't use the concept to its fullest extent.