It is often useful to select only the Family Instances (Component Families) from the current document. This can allow easy access to element parameters, or could even be paired with a Family Location node to then access the point coordinates of all family origins. This node takes no inputs, and runs against the current document. It is a simple wrapper of the Element Types and All Elements of Type Standard Nodes, but it uses less screen real estate and is a good building block for more advanced workflows.