| ARENA | Applied Research Ethics National Association | 美国应用研究伦理协会 |
| ARENA | Area Recreation Entertainment Nutrition And Association | 区域娱乐娱乐营养与协会 |
| ARENA | Antarctic Research, a European Network for Astronomy (European Union) | 南极研究，欧洲天文学网络（欧洲联盟） |
| ARENA | National Republican Alliance Party (El Salvador) | 全国共和党联盟党（萨尔瓦多） |
| ARENA | Aliança Renovadora Nacional (Brazilian historical political party) | Aliança Renovadora Nacional (Brazilian historical political party) |
| ARENA | Alianza Republicana Nacionalista (Nationalist Republican Alliance Party, El Salvador political party) | Alianza Republicana Nacionalista（民族主义共和党联盟党，萨尔瓦多政党） |
| ARENA | Advanced Research on the Europeanisation of the Nation-State | 民族国家欧洲化研究进展 |
| ARENA | Adoption Resource Exchange of North America | 北美收养资源交流 |
| ARENA | National Renewal Alliance | 全国复兴联盟 |
| ARENA | Automated Recourse to Electronic Negotiation Archives | 电子谈判档案的自动检索 |