Forces acting on charges moving in magnetic and electric fields are used to deflect and focus beams of electrons in many practical devices.  Perhaps the most common (but rather complicated) example of this is the TV tube.  The image on the face of the tube is due to a beam of electrons hitting a coating of a material called phosphor which emits light on being struck.  The beam of electrons is deflected in a very complex way be electric fields applied to parallel plates between which the beam passes.