1. A file inventorying apparatus for determining a status of a member file in a storage means of a digital data processor, said storage means for storing one or more files, each file storing one or more information-representative signals and having at least a file name, said status including a name associated with one or more known file sets and optionally including a version number, said file inventorying apparatus comprising A. collection means coupled with said storage means for identifying the file name of said member file, B. list means for storing a file name and one or more patterns of information-representative signals associated with at least one component file of each of a plurality of known file sets, C. comparison means, coupled to said list means and to said collection means, for comparing the file name of said member file with those of at least selected ones of said component files, and for generating name-match signals representative of candidate component files whose names are substantially identical to that of said member file, D. test means, coupled to said storage means, said comparison means, and said list means, for responding to said name-match signals for running one or more tests against said member file, at least one such test including comparing at least selected information-representative signals of said member file with said one or more patterns of information-representative signals associated with each of said candidate component files, and for generating one or more test-result signals representative of the results of those tests, E. loader means, coupled with said test means, for determining said status of said member file, said loader means including i) confidence means responsive to a) the file name of said member file, b) a name associated with a known file set with which a candidate component file is associated, c) one or more of said test-result signals, for generating a signal representative of a confidence factor of the association between said member file and that known file set, and said loader means further including output means responsive to at least a selected confidence factor for generating an output signal representative of the status of said member file, said status including at least the name associated with that known file set.