This high school physics computer software resource is a systems and control simulator that covers the topics of electricity, electronics, mechanics, and programming. Circuits can easily be simulated on the screen and electronic and mechanical components can be combined. In addition to those provided in Crocodile Technology, a student can create their own electronics system blocks to add to the library. Students can write simple programs using flowcharts and see them running on micro-controllers onscreen before downloading the program into a real micro-controller using the manufacturer's plug-ins. (ASK)