The DS2G program is a general program for the computation of two-dimensional or axially symmetric flows by the direct simulation Monte Carlo (DSMC) method. The sampling of the flows may be either for a permanently unsteady flow (with or without ensemble averaging) or for a time averaged steady flow at large times. It is a self-contained executable program for Intel based (486DX or higher) PC’s. The data input is through a series of on-screen menus. The output can be through text files and/or files for the TECPLOT post-processing program.