Use the Internet to find five references on any of the topics in which you have an interest (as you defined in earlier questions). What purpose do the following search commands serve? (a) phonebook:...

Use the Internet to find five references on any of the topics in which you have an interest (as you defined in earlier questions).

What purpose do the following search commands serve?

(a) phonebook:

(b) *

(c) “blended families families” (entering one word twice)