Several companies , including ASEA Brown Boveri, Siemens , Endress+Hauser , and Emerson , lead the process automation sector . ASEA Brown Boveri specializes in power & automation and drives , while https://socialwebnotes.com/story7126274/asea-brown-boveri-versus-electrical-siemens-versus-endress-hauser-versus-emerson-electric-a-look-at-leading-automation-firms