Outmoded Technologies: The Operator

Some of my favorite songs make reference to technologies that we just don't use anymore. Case in point, your friendly neighborhood information operator:

1. Chuck Berry: The Original Memphis, Tennessee (1959)
   
   
   
   
2. Jim Croce, Operator (1972)
   
   
   
   
3. Dr. Hook (and the Medicine Show), Sylvia's Mother (1972)