ncoa
National Council on the Aging （
中文解释
- abbr. National Campground Owners Association 全国野营地业主委员会; National Council on the Aging NCMEC National Center for Missing and Exploited Children 全国失踪儿童搜寻中心; Noncommissioned Officer Academy 士官学校
- 美国）全国老年人问题理事会