The best answer is - every aspect of our electric life.
Westinghouse was an an inventor and entreprenur that lived around the same time when Thomas Alva Edison lived. I't is also not surprising to mention that they were grand rivals, as they were inventing things in the same field. Namely, Westinghouse developed a system that distributes electricity based on alternating current which is also the type we still use today and thus surpassed the idea of Edison which was based on the idea of direct current.
