Sir, Thanks a lot for the explanation.It really helped me to understand that the MVC is in the app.server side.You also mentioned that the business data objects like the product data is cached and if my understanding from the doc.is right,you mentioned that the caching mechanism in written in C (for performance in the app side).So the question is , are you using socket in the model layers to communicate it to the cache to fetch the data objects? If so, do we have any custom written message protocol to accomplish this. Too much of interest in your article is making me to ask these kind of foolish questions, so kindly bear with me.