| Acronym | Definition |
|---|
| LER | Lesão por Esforço Repetitivo (Portuguese: Repetitive Strain Injury) |
| LER | Label Edge Router |
| LER | Long Eye Relief (optics) |
| LER | Law Enforcement Ranger |
| LER | Lebensgestaltung Ethik Religionskunde (German: Design life of Ethics Religious Studies) |
| LER | Link Error Rate |
| LER | Least Error Rate |
| LER | Level Error Rate |
| LER | Line Edge Roughness (semiconductor fabrication) |
| LER | Land Equivalent Ratio |
| LER | Luminaire Efficiency Rating (lighting) |
| LER | Luminaire Efficacy Rating |
| LER | Light Emitting Resistor (a resistor burning up) |
| LER | Licensee Event Report |
| LER | Leaf Elongation Rate (botany) |
| LER | Licensing Economics Review (newsletter) |
| LER | Labyrinth Excluder Ring (engineering) |
| LER | Launcher Equipment Room |
| LER | Loss Exchange Ratio |
| LER | Local Equipment Room |
| LER | Luminous Electronics Recycling, Inc (Denver, CO) |
| LER | Language Equivalence Relations |
| LER | Local Electrical Room |
| LER | Laboratoire d'Etude de Radiopharmaceutiques (French) |
| LER | Land, Easement, and Right of Way |
| LER | LANSCE/Energy Research Program |
| LER | Laboratorium voor Ecologische Risicobeoordeling |
| LER | Lepidoptera of Eretna State |