The zip file pertains to my paper "Optimal binomial, Poisson, and normal left-tail domination for sums of nonnegative random variables" (arXiv:1503.06482v3 [math.PR]). This zip file contains two folders: Mathematica and Reduce(Redlog). The folder Mathematica contains certain Mathematica notebook (.nb) files and their pdf copies. The folder Reduce(Redlog) contains certain log files of sessions in Reduce and .png copies of the sessions.