International Society of Automation

International Society of Automation ( ISA) was founded as the Instrument Society of America on April 28, 1945 in Pittsburgh, USA by Richard Rimbach. The ISA has over 28,000 members in 100 countries.

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.