Interesting !!!!!!

A two tier architecture is where you would have a some web pages or simple application running at the client side and at the back end a server with functionality to answer the queries of the client.A three tier application you have a client application, a middle-ware and database or EIS system running at back end.The middle ware would have a web-server and a application server.Now the interesting part is that i have found that human body is a typical example of the above said architecture.I have seen people who hav good appearance- the client side And a brain some kind of server that send queries to all the 5 senses or in this case 5 different client programs running at the front end.Again some people hav additional processes running in brain to validate the business logic--- in this case how to help himself at any cost.Brain is a excellent database with the concept of garbage collection with in database as it deletes less referenced data after a period of time.Truly amazing that what we are trying today or may invent tomorrow is already present within our body.