The true meaning of service

I was confused when I heard the word 'service' used with these agencies:
Social Service
Internal Revenue 'Service'
U.S.. Postal 'Service'
Telephone 'Service'
Cable TV 'Service'
Civil 'Service'
State, City, County & 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 'a few cows.

BAM!!! It all came into focus. I now understand what all those
agencies are doing to us.

Now you are as enlightened as I am.