| LER | Level Error Rate | 等级错误率 |
| LER | Label Edge Router | 标记边界路由器 |
| LER | Leinster, Western Australia, Australia | Leinster，西澳大利亚州，澳大利亚 |
| LER | Logansport and Eel River Short-Line Company Incorporated | Logansport and Eel River短线公司 |
| LER | Local Equipment Room | 本地设备室 |
| LER | LANSCE/Energy Research Program | LANSCE /能源研究计划 |
| LER | Licensee Event Report | 被许可方事件报告 |
| LER | Loss Exchange Ratio | 伤亡互换率 |
| LER | Language Equivalence Relations | 语言等价关系 |
| LER | Luminaire Efficacy Rating | 灯具功效评级 |
| LER | Local Electrical Room | 本地电气室 |
| LER | Laboratorium voor Ecologische Risicobeoordeling | Risicobeoordeling生态实验室 |
| LER | Light Emitting Resistor (a resistor burning up) | 发光电阻器（电阻器烧坏） |
| LER | lysosomal enzyme release | 溶酶体酶释放 |
| LER | leukoerythroblastic reaction | 白血球反应 |
| LER | Lepidoptera of Eretna State | 埃雷特纳州鳞翅目 |
| LER | low estrogen responders | 低雌激素应答者 |
| LER | Land, Easement, and Right of Way | 土地、地役权和通行权 |
| LER | Laboratoire d'Etude de Radiopharmaceutiques (French) | Laboratoire d 'Etude德Radiopharmaceutiques(法国) |
| LER | Luminous Electronics Recycling, Inc (Denver, CO) | Luminus Electronics Recycling，Inc（科罗拉多州丹佛市） |
| LER | Line Edge Roughness (semiconductor fabrication) | 线条边缘粗糙度（半导体制造） |
| LER | Land Equivalent Ratio | 土地当量比率 |