E-commerce between businesses is B2B. E-commerce between businesses and consumers is called B2C. What are some examples of each?

E-commerce between businesses is B2B. E-commerce between businesses and consumers is called B2C. What are some examples of each? How do you think each entity (business, consumer) benefits from e-commerce? Bricks and clicks is a business model that incorporates both a physical presence and an online presence. Give some examples of businesses that follow the bricks and clicks model. Are there any businesses that have only an online presence?