Since the analysis of data files can be a long and tedious process, a computer program called DATANALYSIS is listed in Appendix A to assist readers in determining the susceptibility of their data to one or more compression algorithms. Through the use of the DATANALYSIS program, you examine the consistency of your typical data files and plan the implementation of one or more compression routines with a predefined expectation of results. As we review the program execution against a system output ‘SYSOUR’ data file, we will be able to predetermine the effect of different compression algorithms.