Salt Lake City-based Xi3 Technologies has been quietly developing a computer that's roughly four inches by four inches, or about the size of a grapefruit. But what sets this gadget apart from other portable PCs is that the Xi3 splits the core functions of a traditional PC into three separate, easily replaceable components. Think of it as a high-tech equivalent to Ford's model T, which was considered so simple that anyone could repair it.
Each Xi3 device is made up of three separate modules: one for the processor, one for how the unit communicates on a network and a third for power. This means you can upgrade any of these components -- say, to swap out for a faster processor -- with little effort. Just unscrew the back panel, slide out the required part, put the hatch back on and you're done.
Being able to conveniently access individual parts of a computer allows users to upgrade the device as software needs change or when specific parts fail. Entry-level models cost $850 and come with 16 GB of memory built in. Expandable drives are optional and cost extra.
