Task definitions are used by a task scheduler and prioritizer to allocate task operations to a plurality of processing units. Light generated from the LED is guided into the light guide plate through the edge thereof, and outwardly projected through the two opposite surfaces of the light guide plate. A distance from a reference point to a mesostructure surface point along a viewing direction is measured using the mesostructure distance function. The protective device 104 preferably includes a shear-relief portion 302 formed such that the front of a hoof has minimal contact with the device 104. The static content may be changed for various original equipment manufacturers, applications, and so forth, while allowing dynamic content to vary depending upon the software and application running on the interface device.