Abstract: A point-to-multipoint radio broadcast communication system comprises a directional transmitter focused on a particular one of a plurality of receivers in a linear arrangement, such that the angle between each successively closer receiver and the transmitted beam increases as the distance between the transmitter/receiver pair decreases. Thus, a low-power directional transmitter can effectively transmit to a line of receivers due to the trade-off between a receiver being off-center and its closer proximity to the transmitter.

Abstract: A system for recording and displaying information about work practice through a set of at least two different graphical tools, each associated with at least one kind of information about work practice and at least one kind of workplace object. The graphical user interface of each tool has at least one characteristic display metaphor conventional for a kind of information associated with the tool. Each tool has at least one characteristic display metaphor that differs from at least one of the characteristic display metaphors of every other tool in the set of tools. The graphical user interface of one of the tools is augmented to display information of a kind associated with a different one of the tools.