BUI: Browser User Interface. BUI is a technology which unifies the desktop environment inside the browser. Implementing such an interface will radically alter the desktop environment. First and foremost, the concept of a separate browser running on a desktop is eliminated. In fact, the browser will be the desktop. The need for having browser as a separate application running on the desktop is eliminated and the browser is made the desktop itself. Such a technology will provide a better access to the internet and better management of work on and off-line. The Browser User Interface will be easier to implement and provides easy use to all its users. This technology basks on the growth of the browsers. The BUI based operating system is perfect for organizations which involves cloud computing for storage. BUI eradicates the explicit connection to the internet and automatically connects to the net while the OS program is loaded. BUI marks the future of the operating systems using browser as desktop interface.