The industrial control arena is led by a handful of major players, namely Siemens, Allen-Bradley (now part of Rockwell Automation), ABB, and Schneider Electric. Siemens is often regarded as a complete solutions vendor, https://honeywell282009.blognody.com/53352716/siemens-allen-bradley-abb-and-schneider-a-comparison-of-industrial-automation-giants