Wolfram SystemModeler 4.0.1 Multidomain Modeling Real-world machines and systems are rarely confined to a single physical domain such as mechanical, electrical, or thermal. SystemModeler models can contain any combination of interconnected components from any number of domains. Under simulation, these more realistic multidomain models can uncover important effects that would be missed using a less integrated approach. Drag & Drop Modeling Quickly and intuitively create models using SystemModeler's drag-and-drop approach. Pick up components like transistors or springs, and drop them onto the canvas. Draw lines between components to indicate physical connections like electrical wiring or mechanical attachment. Library Store Expand the capabilities of SystemModeler by adding paid and free libraries from a wide and expanding range of different areas available in the SystemModeler Library Store. Libraries contain reusable components with viewable source code, documentation, and detailed examples. Hierarchical Modeling Create hierarchical component-based models that follow the topology of the real-world system and that are easier to develop and understand than traditional "block-based" models. In SystemModeler, individual submodels are separately testable and reusable, allowing you to quickly explore alternative designs and scenarios.