INTRODUCTION This explains the meaning of the different file extensions of the output files in this directory. In the BaselineMilestone/in directory these same file extensions are used and correspond to the same runs as this output in this BaselineMilestone/out directory. FILE EXTENSION MEANINGS *.15003 means that the file was generated as part of the output from the Baseline Milestone run. The 15003 refers to the number of elements in the model (3 boundary condition elements and 15000 elements for which the simulation computes the behavior). This was computed using the MMP flag in the input prk.input.15003 file set equal to 1 *.715 means that the file was generated as part of the output from one of two smaller runs that can be used for comparison for validation of one's own runs. The 715 refers to the number of elements in the model (3 boundary condition elements and 712 elements for which the simulation computes the behavior). This was computed using the MMP flag in the input prk.input.715 file set equal to 1 *.715noMP means that the file was generated as part of the output from one of two smaller runs that can be used for comparison for validation of one's own runs. The 715 refers to the number of elements in the model (3 boundary condition elements and 712 elements for which the simulation computes the behavior). This was computed using the MMP flag in the input prk.input.715noMP file set equal to 0 DIFFERENCES IN INPUT FILES BETWEEN DIFFERENT RUNS The only essential differences in the input files to generate these three sets of outputs was two items: 1) the value of ne (15000 or 712) and of MMP (1 or 0) in the prk.input.* files 2) the nature of the model as defined in the prk.dat.* files. Since this data file defines the model geometry and the number of elements, it can be the same for both the 715 and the 715noMp versions. There are other differences in the prk.input.* files, namely the names of the input and output files are contained therein and these differ, just so each run will make its own set of output files and will use the correct prk.dat.* file. HINTS FOR DOING VALIDATION RUNS TO COMPARE OUTPUT FILES If one wants to validate one's own runs, the number of time steps ndt set in the prk.dat.*file could be made smaller than 500. For the first run just to be sure everything is working one can set ndt to 2 for example. Making plots of the prk.tecplot.* files can provide a quick way to see if one's own output is giving similar results to those in the validation suite or even those in the Baseline Milestone run. These give the history of the stress, velocity, and displacement on two cells. The second zone does this for the cell with the most negative A-B, and the first zone does it for the cell at that same depth, but at a spot to the North where A-B is positive.