Based on class notes, match the definitions below to the appropriate term.

C$.vv,$ occurs when the value of using a system positively depends on the number of other system users.

is generally defined as something that makes it difficult to start a new business in an industry.

is defined as a reduction in unit average cost achieved by spreading fixed costs over a high volume of units.

is defined as something that makes it difficult to change from one provider to a competing provider of some product or service.

A$.vv$ is a product that can be delivered over a telecommunications network.

is a product that cannot be differentiated $($e$.$g$.$ all units are the same$)$

A$.$ A digital product

B$.$ Economies of scale

C$.$ A positive network extenality

D$.$ A commodity

E$.$ A barrier$-$to$-$entry

F$.$ A switching cost