A new crystalline polymorph of ritonavir and methods for its use and preparation are disclosed. In addition, it makes a display portion display an urgent message for instructing a user to back up data recorded on the optical disk quickly when it is determined that one or more of the values have exceeded limit reference values. The at least one module may also be adapted to display video information corresponding to the video selection. In a pen mode, pen down events in an ink field are formulated as pen data. Each wing forms a lateral supporting surface for the base of the open lower end, which allows tilting of the panel in a preset direction, with the retention elements in the configuration for releasing the panels.