A labor union is an organization of employees that represents the collective interests of its members in negotiations with employers about grievances, disputes, pay, hours, and other terms and conditions of employment. These actions are called "collective bargaining." The National Labor Relations Act (NLRA) guarantees the right of workers in the private sector to unionize. Nonunionized employers that want to retain that status need to be aware of the tactics that unions use to attract workers. The NLRA defines the process a union must follow to become the bargaining agent for a group of workers, sets out the rules for collective bargaining, and provides limited rights to employees in nonunion settings.