Quite a few companies , including ABB , Siemens , E+H, and Emerson Electric, lead the process automation market. ABB offers power & automation and drives , while Siemens features a broad range of https://total-bookmark.com/story21801345/asea-brown-boveri-versus-electrical-siemens-versus-endress-hauser-versus-emerson-a-comparison-at-leading-automation-firms