Treemap-Type User Interface

A user interface system based on a treemap-type presentation, the system comprising a processor;

• and a memory to store data used by the processor, wherein the processor is operative to:
• store data for a plurality of items which can be invoked;
• generate data for a user interface screen having a plurality of regions arranged according to an arrangement, at least some of the regions being different sizes and being arranged in the arrangement according to a size order of the regions;
• assign at least some of the items to the regions of the user interface screen;
• receive a plurality of user selections from an input device;
• determine which one of the items is being selected for each one of the user selections;
• and
• refresh an assignment of the items among the regions of the user interface screen so that even though the assignment of the items among the regions is changed as a result of the refreshment, the arrangement and sizes of the regions in the user interface screen remain unchanged.