These executives work for wholesalers of 1) motor vehicles and motor vehicle parts and supplies; 2) furniture and home furnishings; 3) lumber and other construction materials; 4) professional and commercial equipment and supplies; 5) metals and minerals; 6) electrical goods; 7) hardware and plumbing and heating equipment; 8) machinery, equipment and supplies; 9) miscellaneous durable goods; 10) paper and paper products; 11) drugs, drug proprietaries and druggists' sundries; 12) apparel, piece goods and notions; 13) groceries and related products