51. The invention set forth in claim 48 wherein said examination of a subdirectory ceases when a preset error number is reached.
48. A system for providing directory look up, said system comprising means for subdividing a given directory into a subdirectory of names having bounds defined by a certain character of a presented name, means for recursively examining said subdirectory names for matches between a certain presented name character and a certain subdirectory character, said examination to cease when the last character of the presented name has been examined and when the first character string in the subdirectory is zero, means for calculating an error number for each subdirectory string of characters where matches occur, and means for sequentially providing indications of the directory names having error numbers lower than a preestablished number.