Numerous firms , including ABB , Electrical Siemens, E+H, and Emerson , represent the process automation market. ASEA Brown Boveri specializes in power & automation and drives , while Electrical Siemens https://bookmark-nation.com/story21769841/abb-versus-siemens-versus-endress-hauser-versus-emerson-a-comparison-at-industrial-automation-giants