Abstract: Parallel data-structures distribute a given data set to system components by grouping the data set according to ranges. These ranges are sub-divided for distribution into parallel form. A given data value is located by its placement within an appropriate range; the ranges are located by their relationships to each other and the data set as a whole; thus, the ranges are related to each other, the order of the data set is maintained and access is gained to the data set by range. Each range may be distributed to multiple nodes; each node may be contained in a separate data-structure; each separate data-structure may be maintained on a separate system component. The result is a method of creating and using parallel data-structures that may take a wide variety of forms and be used to control data distribution and the efficient distribution of system resources.