These industry giants – ABB , Siemens , Endress+Hauser , and Emerson Fisher – represent the pinnacle of process automation , each possessing distinct strengths . ABB is noted for its automation systems and https://shaunazvex281971.wikirecognition.com/2496074/asea_brown_boveri_siemens_endress_hauser_fisher_controls_a_detailed_review