Some breakthrough products as well as services have literally changed the world. The automobile, the telephone, the Internet and countless other inventions have historically shifted the ways people live and work. However shifts in ways doing business have as well had dramatic impact on lives throughout history. Self-service shopping, online sales, overnight shipping, 24/7 business hours and globalization of services such as call centres, are other instances. Look back through history as well as list three or more ways these shifts impact customer service.