Technical Organizations Additional technical information is available from these organizations: ACS      American Chemical Society ANSI     American National Standards Institute  API        American Petroleum Institute ASM      Materials Information Society ASME    American Society of Mechanical Engineers DNP     DNP Users Group EPRI     Electric Power Research Council IEEE     Institute of Electrical and Electronic Engineers ISA       International Society of Automation (formerly Instrumentation, Systems and Automation Society) ISO       International Organization for Standardization NIST     National Institute of Standards & Technology NTIS     National Technical Information Service