I'm So Confused

I became confused when I heard 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 are doing to us!