TunnelSys combines three computer programs, the design and wind tunnel test programs, and a post-processing program to plot the results from the wind tunnel test. With the post-processing program you can compare the results from multiple wind tunnel test designs. For the TunnelSys Application, the output from design program becomes the input to the wind tunnel test program and the output from the test program becomes the input to the post-processing program. Output files must be saved on the user's computer. For the TunnelSys Applet, there is an initial switching program that invokes the three process programs and provides a status indicator.