1. Inserting component
  2. Inserting part
  3. Unload/load components
  4. 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.