Advanced Research Projects Agency (US DoD; now DARPA)高等研究计画署(DARPA)国防部;现在 Advanced Research Projects Agency高级研究计划局（美国内） Agenzia Regionale Protezione Ambiente (Italian: Regional Agency for the Protection of Environment)Regionale Protezione Ambiente 300(意大利:区域代理,为保护环境) Autolinee Regionali Pubbliche Abruzzesi SpAAutolinee Regionali Pubbliche Abruzzesi温泉 Arctic Research and Policy Act of 1984北极的研究与政策的行为 Area Radar Prediction Analysis区域的雷达预测分析 Archaeological Resources Protection Act of 1979考古资源保护法案,1979年 Association for Reformed Political Action协会为改革政治行动 African Revenue Protection Association非洲的税收保护协会 Automatic Radar Plotting Aid自动雷达标绘仪 Amazon Region Protected Areas亚马逊河流域保护的区域 Alabama Recreation and Parks Association阿拉巴马州的娱乐和公园协会 Average Revenue Per Account平均帐户 Arkansas Recreation and Parks Association阿肯色州的娱乐和公园协会 Astoria Railroad Preservation Association (Astoria, OR)铁路保护协会(区区,或)