| MCAR | Missing Completely At Random | 随机完全丢失 |
| MCAR | Military Construction, Army Reserve | 军事建设、陆军预备役 |
| MCAR | Machine Check Analysis and Recording | 机器检查分析和记录 |
| MCAR | Mobile Cosmetic Auto Repairs | 移动美容汽车维修 |
| MCAR | Multiple Channel Aural Reception | 多通道音频接收 |
| MCAR | Model Civil Aviation Regulations | 民用航空条例范本 |
| MCAR | Marine Corps Air Station | 海军陆战队航空站 |
| MCAR | Multichannel Acoustic Relay | 多通道声学继电器 |
| MCAR | mixed cell agglutination reaction | 混合细胞凝集反应 |
| MCAR | Medcare Technologies, Inc. | Medcare Technologies公司。 |