Scaling Laws -- Elastic deformations -- Thin Films -- Conductor Paths -- Electrical Measurements -- Membranes -- Strain gauges on membranes -- Beams -- Vibrations -- Capillaries -- Capacitive forces -- Piezoelectric effect -- Thermal actuators -- Micro optics -- Diffusion -- Micro valves -- Micro pumps -- Micro dosing -- Analogies of physical domains -- Mechanical devices for electronics.