From Nokia Developer Wiki
Article does not contain any code or any thing, but its contain a basic thing about the Bluetooth. At now a days, most of the mobile contain the Bluetooth. And many applications are developed on Bluetooth. So to know about Bluetooth is very important as a developer. And as developer to know just a Bluetooth is a communication part not enough. To develop application on Bluetooth we must know every thing about Bluetooth. At here this and linked article explain about Bluetooth, its protocols and etc. so it’s a very good for every developer.