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Instrument Society of America (ISA) ISA standard information International Organisation for Standardisation (ISO) Institute of Electrical & Electronics Engineers (IEEE) American Society of Mechanical Engineers (ASME) American National Standards Institute (ANSI) Ameriacn Petroleum Institute (API) American Institute of Chemical Engineers (AIChE) Fluid Control Research Institute (FCRI) Deutsche Institute fur Normung (DIN) Fieldbus Foundation OLE for Process control (OPC) OPC Programmer’s connection BACK