Human resources is the set of individuals who make up the workforce of an organization, business sector, or economy. "Human capital" is sometimes used synonymously with human resources, although human capital typically refers to a more narrow view (i.e., the knowledge the individuals embody and can contribute to an organization). Likewise, other terms sometimes used include "manpower", "talent", "labour", or simply "people". The professional discipline and business function that oversees an organization's human resources is called human resource management. That element of human resource management concerned with obtaining and retaining a workforce with the necessary skills, competences, values, attitudes, and other attributes. As such, it is akin to other generic HR activities, such as employee development, reward management, and employee relations. Employee resourcing embraces a number of critical HR activities, including human resource planning, recruitment, selection, retention, and the range of processes that govern the exit or release of employees from employment. Included in employee resourcing are decisions about the proportions of employees who should be employed under different types of employment contract: that is, the proportions of full-time to part-time, temporary to permanent, and directly employed to subcontracted labour.