The program orst.spins.Spins is an interactive computer program that simulates Stern-Gerlach-type measurements on spin-1/2 and spin-1 particles. Within the context of the OSP project, the Java program has been extended allowing for "experimental" parameters to be saved in XML files. Spin systems are perhaps the simplest, yet interesting, systems to explore the effect of quantum-mechanical measurement on states. These examples depict the measurement of a beam of spin-1/2 particles. When an analyzer is blue, it can be clicked and its orientation changed. When an analyzer is black, its orientation is fixed.