Water

•  AWWA American Water Works Association
•  NRWA National Rural Water Association 
•  WEF Water Environment Federation

Process

• AiChe American Institute of Chemical Engineers
  
• ISA International Society for Automation 
  
• Globalspec
• MCAA Measurement, Control & Automation Association

Oil and Gas

• SPE Society of Petroleum Engineers
  
• NPRA National Petrochemical & Refiners Association

Irrigation

• IA Irrigation Association
  
• NGWA National Ground Water Association