RIM's Blackberry is one of the most popular mobile devices on earth. The reasons seem quite simple. It is small, portable, attractive and fast. It shines when using its e-mail. And it makes a great cell phone. those are reasons why Micrisift is having limited success penetrating the Blackberry's market with its new Palm Treo loaded with Windows technology. Although the Microsoft approach sounds attractive for interactive computing with larger systems, nevertheless the basic elements of Blackberry's design and functionality seem to be what customers want. It's going to be even more of a competitive field though in the future. Mobile Computing: A Window into the Future?