1. A computer-implemented method for sorting and displaying a sequence of permutations of a table of data objects, comprising concurrently displaying, by a computer system, a data table containing a number of data objects, each with associated values of specified parameters, and an item screen, said item screen concerning a selected one of the data objects in the data table and including parameter value information concerning said selected one of the data objects from the data table, said item screen further including user-manipulable controls for entering further information concerning said selected one of the data objects, including references to related others of the data objects in the data table.