International Society of Automation
ISA 1949 defined the first standard, RP 5.1 Instrument Flow schematic symbol, which since then many have followed further. ISA organizes numerous conferences and exhibitions, publishes books and defined standards.
Since ISA had become a strong international Siert and the technical focus increasingly went beyond instrumentation, ISA was founded in 2000 in ISA - renamed The Instrumentation, Systems, and Automation Society. In 2008, the ISA had been renamed again in the International Society of Automation.