| Acronym | Definition |
|---|
| RER➣Regione Emilia-Romagna |
| RER➣Rental Equipment Register |
| RER➣Réseau Express Régional (French commuter rail in Paris) |
| RER➣Rough Endoplasmic Reticulum |
| RER➣Respiratory Exchange Ratio |
| RER➣Radio Edge Router |
| RER➣Re-Recording |
| RER➣Read Error |
| RER➣Renewable Energy Resource |
| RER➣Real Exchange Rate |
| RER➣Review of Educational Research |
| RER➣Replication Error |
| RER➣Radiological Emergency Response (various locations) |
| RER➣Regional Express Network |
| RER➣Recurrent Exertional Rhabdomyolysis |
| RER➣Reed Electronics Research (Reed Business Information) |
| RER➣Real Estate Resources, Inc. (Cincinnati, OH) |
| RER➣Reading to End Racism (various locations) |
| RER➣Relative Energy Ratio |
| RER➣Régimen Especial de Renta (Spanish: Special Income Scheme; taxes) |
| RER➣Radio Est Réunion (French radio station) |
| RER➣Respiratory Exchange Rate |
| RER➣Remediation Effectiveness Report |
| RER➣Research Expenditure Report |
| RER➣Rubberized Equipment Repair |
| RER➣Resting Energing Requirement |
| RER➣Resource Efficiency Ratio |
| RER➣Receiver-Exciter Ranging |
| RER➣Repair Effectiveness Rating |
| RER➣Remote Read-Out |
| RER➣Radio Expenditure Report |
| RER➣Reactor Event Report |
| RER➣Radiation Effect Reactor |
| RER➣Reusable - Expendable - Reusable |
| RER➣Redeye Reduction (camera technology) |
| RER➣Regional Expected Results (World Health Organization) |
| RER➣Record of Environmental Review (US FEMA) |
| RER➣Recognition Error Rate (speech synthesis design value) |
| RER➣Resting Energy Rate |
| RER➣Radar Echo Return |
| RER➣Resource Evaluation Report |