Numerous companies , including ABB , Siemens , Endress+Hauser , and Emerson Electric, lead the process automation market. ASEA Brown Boveri specializes in automated systems and drives , while Siemens https://bookmarkworm.com/story21891153/abb-versus-siemens-versus-endress-hauser-versus-emerson-a-look-at-industrial-automation-giants