A multifunction watch provides plural worlds, each world supporting one or more modes of operation within the world. Separate configurations can be maintained for each world and separate navigation menus can be provided for each world. Modes of operation may be configurable. Duplicate worlds and duplicate modes within worlds are provided. In certain embodiments a desired world can be selected by manipulating a bezel. In some embodiments the bezel rotates to engage and activate one of a plurality of switches, thereby selecting a corresponding world. Each world operates independently of other worlds and some functions can be shared between worlds and between modes within worlds. An example is described in which a multimode watch provides four worlds including TIME, RIDE, COMPASS and SPEED.