There are many facets to the typical employment relationship. At its very simplest, employment involves the exchange of labor for compensation. Nevertheless, employment relationships also involve control of the worker by the firm, the acquisition of skills through experience and training, learning about each others’ qualities and intentions, and career progression as the worker moves from role to role within the organization. In addition, employment usually imposes a variety of specific legal obligations on both employer and employee. Traditionally, these obligations have been combined into a single relationship between worker and firm.