What are two or more simple machines called?

There are six simple machines:

Inclined Plane

Wedge

Screw

Pulley

Wheel

Lever

The two classes of simple machines are:

1. The simple machines that deal with vector quantities like velocity and force

(the inclined plane, the wedge and the screw).

2. The simple machines that deal with torque (the force to rotate an object around an axis, pivot, etc.) like the pulley, the wheel, the lever.

You would think a screw falls into the torque class, but it's classified as a helical inclined plane.