`test` is the main command of the [tcltest] package. Tcl/Tk This contribution is also meant to brag about Tcl/Tk, which was used to create the browser. It’s flexibility and power have allowed me to easily pursue different questions as they came to mind. An example is figure 10, which is a plot of the set of Twin Primes less than 500,000. The question was, ‘Are there Twin-Prime Rich directions?’ It’s apparent that Twin-Prime Rich directions are not nearly as prominent as were the prime rich directions. Affixed to the plot, is Euler’s trajectory in red. [Pr_Scr FIg 1] <>Testing