OpenJSCAD<br> Parts infobox<br> Techniques infobox<br> Projects infobox<br> Materials infobox<br> Transformations infobox<br> Lifecycles infobox<br> Vitamins infobox<br>

Introduce to the groups: * materials * processes / transformations * parts * assemblies / techniques * tools / projects

sources and consumers of each

* produced * consumed * waste