Quite a few firms , including ABB , Siemens , Endress+Hauser , and Emerson , lead the process automation sector . ASEA Brown Boveri offers automated systems and electrical solutions, while Siemens features https://minibookmarking.com/story22085728/asea-brown-boveri-versus-electrical-siemens-versus-e-h-versus-emerson-a-look-at-leading-automation-firms