Several companies , including ASEA Brown Boveri, Electrical Siemens, Endress+Hauser , and Emerson Electric, represent the process automation sector . ABB specializes in power & automation and motion control https://bookmarkingdepot.com/story21877421/asea-brown-boveri-versus-siemens-versus-e-h-versus-emerson-electric-a-look-at-leading-automation-firms