I became very confused when I listened carefully to the word  "service" used with these agencies:
     
Internal Revenue 'Service' 
Postal  'Service' 
Telephone 'Service' 
Cable TV 'Service'  
Civil  'Service' 
City, Provincial & Public 'Service' 
Customer 'Service' 

This is not what I thought 'service' meant. 

But today, I overheard two farmers talking, and one of them said he had hired a bull to  'service'   his cows.  
  
BAM!!!   It all came into focus.   
Now I understand what all those agencies do for us!