CATIA (Computer Aided Three Dimensional Interactive Application).Learn the basic command of catia one by one and improve yourself.Catia software are used in infrastructure,machine design,weld design ,part design,mold design,tooling design,drafting,assembly design,sheet metal design.etc.Get the free ebook ,guide and video of catia here.

Product structure

By catia programmer

Inserting component
Inserting part
Unload/load components
Replacing components

A component is the general terminology.It can be a part or an assembly (inside an assembly it is called a sub-assembly)

Parts and assemblies have a Part Number (the Name of the component).

All instances of a part or assembly have the same part number .Each instance can have it's own instance Name that identifies the instance.