Medicines and Healthcare Products Regulatory Agency药品监督管理部门和卫生保健产品 Media Human Resources Association媒体的人力资源管理协会 Modern Humanities Research Association (United Kingdom)现代人文研究协会(英国) Medical and Health Research Association of New York City医疗卫生研究协会的纽约 Mental Health Resource Associates, PC心理健康资源从业人员,PC Mental Health Referral Associates (Washington capital area)心理健康推荐员工(华盛顿首都区) Michigan Hot Rod Association密歇根州热杆协会 Miniature Hot Rod Association微型热棒协会 Maine Human Rights Act缅因州的人权法案 Massachusetts Housing Rental Association麻萨诸塞州的房屋租赁协会 Malta Hotels and Restaurants Association马耳他宾馆和饭店协会 Michigan Hydroplane Racing Association密歇根州从而使车轮打滑赛车协会 Multihull Racing AssociationMultihull赛马协会 Managing Health Related Absences (Canada)管理与健康相关的缺席(加拿大) Michiana Horse and Rider Association (Indiana/Michigan)Michiana马和骑手协会(印地安那州/密西根州)