The document discusses issues related to supporting mobile users and devices. It notes that mobility can refer to both users who access information from various locations as well as devices that can be easily moved between locations. There is diversity in the types of mobile devices, platforms, locations of use, and levels of accessibility. The document advocates addressing this diversity by using open standards like HTML5, CSS3, XML, and common file formats when designing and delivering content so it can be accessed across different mobile environments. Examples of devices ranging from low-cost tablets to mini-PCs are provided to illustrate the range of mobility.