| KAR | kanamycin resistant gene | 卡那霉素抗性基因 |
| KAR | Kentucky Association of Realtors | 肯塔基州房地产经纪人协会 |
| KAR | Kentucky Administrative Regulations | 肯塔基州行政法规 |
| KAR | King's African Rifles | 国王的非洲步枪 |
| KAR | Kainate Receptor (neuroscience) | 红藻氨酸受体（神经科学） |
| KAR | Alpha-Keto Acid Reductase | α-酮酸还原酶 |
| KAR | Aromatic Alpha-Keto Acid Reductase | 芳香α-酮酸还原酶 |
| KAR | Kirby Air Ride (game) | Kirby Air Ride（游戏） |
| KAR | Karnataka (India) | 卡纳塔克邦（印度） |
| KAR | Key Account Representative | 大客户代表 |
| KAR | Karen | 凯伦 |
| KAR | Precompiled .prg for KARAT file | KARAT文件的预编译.prg |
| KAR | Kamarang, Guyana | 圭亚那卡马朗 |
| KAR | Karaoke (MIDI music with word track) | 卡拉OK（带有单词曲目的MIDI音乐） |
| KAR | Kansas Administrative Regulation | 堪萨斯州行政法规 |
| KAR | Kentucky Administrative Regulation | 肯塔基州行政法规 |