the SISO standard SISO-STD-001. The purpose is to support transition of legacy DIS systems to the HLA, to enhance a priori interoperability among RPR FOM users and to support newly developed federates with similar requirements. The most recent version is RPR FOM version 2.0 that corresponds to DIS version 6. See also Computer simulation Simulation Interoperability Standards Organization Standard Interface for Multiple Platform Link Evaluation (SIMPLE) References External links SISO DIS Product Support Group DIS Data Dictionary IEEE standards NATO Standardization Agreements Distributed computing architecture Application layer protocols Military simulation Real-time simulation