Driving forces cause change by pushing a system away from equilibrium, while restraining forces oppose change and push a system towards equilibrium. Equilibrium exists when driving and restraining forces are balanced. Kurt Lewin's model of change involves three stages - unfreezing the current situation, moving to a new situation through change, and refreezing the new situation into place. This document discusses applying this model to replacing typewriters with computers in an organization, where resistance to learning computers is a restraining force and increased productivity/knowledge are driving forces.