The package ProbabilitySeries provides six functions for generating orthogonal series expansions of probability density and distribution functions. After defining the details of the series expansion handled by the package ProbabilitySeries, a brief explanation of the package details was presented. Several examples of usage were included for functions defined in the package ProbabilitySeries. Usage of the package functions for generating a -series was not discussed directly; however, these functions are used in exactly the same manner as the corresponding functions for probability density function generation.