Simple machine

A simple machine is...

The traditional list of simple machines is:

• The [inclined plane]?
• The screw?
• The wedge?
• The lever?
• The wheel
• The pulley

All of these convert low forces into high forces or vice versa. The archimedes screw?, which is a pump, is an example of a complex machine where the screw is a helical inclined plane.

There's also a record label named Simple Machines: http://www.simplemachines.net