What is Client Server paradigm with example (Real world analogy) ?

The person or device that is capable of serving is called the Server. In our day to day life we come across various servers. We generally purchase vegetable or fruits from a vendor (Shopkeeper / hawker). We request the shopkeeper for required vegetables/fruits. The shop keeper provides us the required vegetable or fruits. We ask the shopkeeper and he provides us the food items. So, Shopkeeper is at our service, which fulfills our need.