Human Resources covers a range of topics, all dealing with the "People" aspects of running a business or organization. HR has 2 major components HRM (management of people) and HRD (learning and development for staff).
Business/Human_Resources contains sites for companies specializing in Human Resource services. This may be as an HR service provider to other companies or as a provider of advice/resources/consultancy to HR departments.
It has been divided into several sub-categories for companies specializing in a particular aspect of HR. Those offering a more general service can be found at the top level.