| ADAR | Ada Decimal Arithmetic and Representations | Ada十进制算术与表示 |
| ADAR | Audit Development and Reports | 审计开发和报告 |
| ADAR | Adaptive Diagnosis Algorithm and Repair | 自适应诊断算法与修复 |
| ADAR | Air Defense Area Operations | 防空区作战 |
| ADAR | Air Defense RADAR | 防空雷达 |
| ADAR | Air Defense Artillery Regiment (US Army) | 防空炮兵团（美国陆军） |
| ADAR | Advanced Design Array Radar | 先进设计阵列雷达 |
| ADAR | Adenosine Deaminase, RNA-Specific | 腺苷脱氨酶，RNA特异性 |
| ADAR | Air Defense Area | 防空区 |
| ADAR | Association DiabÈte Actions Rencontres | Association DiabÈte Actions Rencontres |
| ADAR | Air Deployable Active Receiver | 空气展开式主动接收器 |
| ADAR | Air Deployable Acoustic Receiver | 空气可展开声学接收器 |
| ADAR | Art Design Admissions Registry | 艺术设计招生登记处 |
| ADAR | Air Deployed Active Receiver | 空气展开式主动接收器 |
| ADAR | Association pour le DÉveloppement des ActivitÉs Rurales | Association pour le DÉveloppement des ActivitÉs Rurales |
| ADAR | Aegis Data Analysis and Reduction | 宙斯盾数据分析与缩减 |