Table 5.7 shows the results of segment V of the DATANAYSIS program. In this program segment, the susceptibility of the data files to half-byte packing is computed and the number of characters that could be saves based upon occurrences of different string lengths containing numeric and predefined characters is listed. Although only a 0.15 per cent file reduction results from half-byte packing, it this technique is added to the run-length encoding technique.