Technical Organizations Additional technical information is available from these organizations: ACS      American Chemical Society ANSI     American National Standards Institute  API        American Petroleum Institute APPA    American Public Power Association ASM      Materials Information Society ASME    American Society of Mechanical Engineers AWEA   American Wind Energy Association AWWA   American Water Works Association CIGRE    International Council on Large Electrical Systems DNP       DNP Users Group EPRI     Electric Power Research Institute IEEE     Institute of Electrical and Electronic Engineers IHA      International Hydropower Association 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  USGBC     US Green Building Council (LEED)