A number of automation companies, including Asea Brown Boveri , The Siemens Corporation, The Endress+Hauser Company, and Emerson Fisher Controls , shape the worldwide landscape of automation solutions . https://charlietqtc186994.thezenweb.com/asea-brown-boveri-siemens-the-endress-hauser-company-emerson-fisher-controls-a-comparative-analysis-80882615