Several firms , including ABB , Siemens , Endress+Hauser , and Emerson Electric, represent the process automation landscape . ABB offers automated systems and drives , while Siemens provides a broad https://bookmark-vip.com/story22072443/abb-versus-electrical-siemens-versus-endress-hauser-versus-emerson-electric-a-comparison-at-leading-automation-firms