Disclosed is a biometric authentication system. The spray nozzle assembly includes a liquid passage for directing a liquid flow stream against an impingement pin, and an air guide is provided for forming an annular pressurized air passage about the liquid flow stream for striking and atomizing a laterally spreading dispersion of liquid from the impingement surface. A user can program the interposer and form a \u201cvirtual\u201d device having a desired value by selectively connecting various one of the array of devices to contact pads formed on the surface of the interposer. The store valid module sets a valid bit when a new cache line is written. One preferred method of extruding cat litter causes starch dextrinization to occur such that at least some of the carbohydrate polymer binder clumping agent in each pellet is formed of dextrin. The cup hole of the plate, as well as the first and second thumb holes, are located within the handle area at different elevations from an elevation of the food-contact area of the plate.