| Acronym | Definition |
|---|
| ERA | Earned Run Average |
| ERA | Equal Rights Amendment |
| ERA | Electronic Research Administration |
| ERA | Electronic Retailing Association |
| ERA | Equal Rights Advocates |
| ERA | Ecological Risk Assessment |
| ERA | Energy Resources of Australia |
| ERA | European Research Area |
| ERA | Educational Research Association (various locations) |
| ERA | Electronics Representatives Association |
| ERA | Environmental Risk Assessment |
| ERA | Electronic Remittance Advice (health insurance) |
| ERA | Electronic Records Archive (NARA) |
| ERA | European Renal Association |
| ERA | ESET Remote Administrator (software) |
| ERA | Excellence in Research for Australia |
| ERA | Expense Reduction Analysts |
| ERA | Extended Range Artillery |
| ERA | Effective Resource Allocation |
| ERA | European Railway Agency |
| ERA | Emerging Research Area |
| ERA | Early Rheumatoid Arthritis |
| ERA | Explosive Reactive Armor |
| ERA | Employment Relations Act (various organizations) |
| ERA | Edinburgh Research Archive (Scotland, UK) |
| ERA | Economic Research Analysis |
| ERA | Enterprise Reference Architecture (software) |
| ERA | Environment Related Activities |
| ERA | Education Reform Act (1998) |
| ERA | Evoked Response Audiometry |
| ERA | Europäische Rechtsakademie Trier (German: Academy of European Law Trier; Trier, Germany) |
| ERA | European Robotic Arm |
| ERA | European Regions Airline Association |
| ERA | En-Route Alternate (aviation) |
| ERA | European Rotogravure Association |
| ERA | Environmentally Relevant Activity |
| ERA | Educational Research Abstracts |
| ERA | English Racing Automobiles |
| ERA | Entity Relation Attribute |
| ERA | Embedded Remote Access |
| ERA | Ethics Risk Assessment (software) |
| ERA | Electronic Research Announcements (journal) |
| ERA | Estonian Road Administration |
| ERA | Elderly Rental Assistance (Oregon) |
| ERA | Entity Relationship Attribute (model) |
| ERA | Economics Research Associates (California) |
| ERA | Engineering Research Associates |
| ERA | Economic Regulation Authority (Australia) |
| ERA | European Ramblers Association |
| ERA | Expedited Response Action |
| ERA | European Regional Airlines Association |
| ERA | Extended Range Ammunition |
| ERA | Emergency Roadside Assistance |
| ERA | Energy Reorganization Act of 1974 |
| ERA | Electrical Response Audiometry |
| ERA | Esperanto Radikala Asocio (Italian) |
| ERA | Early Retirement Age (pension benefit calculations) |
| ERA | Electronic Realty Associates |
| ERA | European Recovery Act |
| ERA | English Racing Automobiles (UK) |
| ERA | European Radon Association |
| ERA | Embedded Remote Access (Dell Computer Corporation) |
| ERA | Engine Room Artificer (Royal Navy) |
| ERA | Economic Regulatory Administration |
| ERA | Excitatory Response Area |
| ERA | Environnement-Recherche-Action (French: Environment-Action Research; Cameroon) |
| ERA | Electrical Research Association (UK) |
| ERA | Education Recording Agency (licensing scheme; intellectual property; UK) |
| ERA | Environmental Restoration Account (cleanup funds) |
| ERA | Employee Reimbursement Account |
| ERA | Eigensystem Realization Algorithm |
| ERA | European Radio Awards |
| ERA | Energy Research Abstracts |
| ERA | Études & Recherches en Archéologie (French: Studies & Research in Archaeology) |
| ERA | Environnement de Réseaux Autonomes (French: Autonomous Networks Environment) |
| ERA | Elder Rights Association (various locations) |
| ERA | Endothelin-Receptor Agonist (hypertension treatment) |
| ERA | Economic Regulatory Agency |
| ERA | Extended Registry Attribute |
| ERA | Environmental Research Applications |
| ERA | Exabiology and Radiation Assembly (European Space Agency experiment) |
| ERA | Entity-Relationship Analysis |
| ERA | Electric Railroaders' Association, Inc |
| ERA | Electronics Recycling Association (Canada) |
| ERA | Economic Recovery Assistance |
| ERA | Endurance Riders of Alberta |
| ERA | Electronic Rothamsted Archive |
| ERA | Electrically Reconfigurable Array |
| ERA | Event Recording Automata |
| ERA | Engine Room Assistant |
| ERA | Everglades Restoration Act |
| ERA | Emergency Reserve Account |
| ERA | Employee Riders Association (of the Harley-Davidson Motor Company) |
| ERA | Estimated Relative Abundances |
| ERA | Egyptians Relief Association (Burke, VA) |
| ERA | English Regional Associations |
| ERA | Executive Recruitment Association |
| ERA | Expedited Removal Action |
| ERA | e-Research Australasia |
| ERA | Extended Range ASROC |
| ERA | Extra Regimental Assignment |
| ERA | Endothelium-Receptor Antagonist |
| ERA | Execution Review Account |
| ERA | Event Relations Analyzer |