There are a number of professional associations, some of which offer training and certification. The Society for Human Resource Management, which is based in the United States, is the largest professional association dedicated to HR, with over 285,000 members in 165 countries. It offers a suite of Professional in Human Resources (PHR) certifications through its HR Certification Institute. The Chartered Institute of Personnel and Development, based in England, is the oldest professional HR association, with its predecessor institution being founded in 1918.