Caller ID is the feature that displays the telephone number of the caller on the telephone of the

person he or she calls. With Caller ID now routine and widely used, it might be surprising that

when the service was first available, it was very controversial because of privacy implications.

(a) What aspect of privacy does Caller ID protect for the recipient of the call? What aspect of privacy does Caller ID violate for the caller?

(b) What are some good reasons why a nonbusiness, noncriminal caller might not want his or her

number displayed?