An interactive FORTRAN program is presented which allows the user to produce probability plots (theoretical quantile-quantile plots) for an input data set based on several types of theoretical distributions. The program provides normal, two-parameter lognormal, three-parameter lognormal, right-tail half-normal, left-tail half-normal, exponential, two-parameter Weibull, and three-parameter Weibull plots. The present version of the program allows data entry and editing from the keyboard (not from stored files) and will accept up to 100 data values. This upper limit could easily be modified.