| Acronym | Definition |
|---|
| MER | Mars Exploration Rover (NASA) |
| MER | Mercredi (French: Wednesday) |
| MER | Merchant |
| MER | Modulation Error Ratio (digital communications) |
| MER | Merrill Lynch (stock symbol) |
| MER | Mercoledì (Italian: Wednesday) |
| MER | Mercator |
| MER | Monthly Energy Review |
| MER | Management Expense Ratio |
| MER | Middle East Report |
| MER | Management Economie en Recht (Dutch) |
| MER | Ministry of Education and Research |
| MER | Middle East Region (Society of Petroleum Engineers) |
| MER | Mid-East Realities |
| MER | Managing Electronic Records |
| MER | Medical Education and Research (exam) |
| MER | Medical Education Resources (Littleton, Colorado) |
| MER | Market Exchange Rate |
| MER | Castle Airport |
| MER | Materials and Electrochemical Research (Tucson, Arizona) |
| MER | Mission Evaluation Room |
| MER | Multiple Ejector Rack |
| MER | MAC Encapsulated Routing |
| MER | Museum Education Roundtable (Washington, DC) |
| MER | Maximum Efficient Rate |
| MER | Management-Employee Relations (USACE) |
| MER | Mentoring and Coaching |
| Mer | Methylenetetrahydromethanopterin Reductase |
| MER | Maximum Effective Range |
| MER | Mechanical Equipment Room |
| MER | Monthly Economic Review |
| MER | Marketing Education Review (journal) |
| MER | Mathematics and Education Reform |
| MER | Manpower Estimate Report |
| MER | Message Error Rate |
| MER | Marine Environmental Response (US Coast Guard Marine Safety Office) |
| MER | Minimum Energy Requirements |
| MER | Monitoring, Evaluation and Research |
| MER | Main Engine Room |
| MER | Management and Employment Relations |
| MER | Mouvement Européen de La Ruralité (French: European Countryside Movement) |
| MER | Maximum Error Rate |
| MER | Medical Expense Reimbursement |
| MER | Mental Health: Evidence and Research Team (WHO) |
| MER | McDaniel Executive Recruiters |
| MER | Minimum Educational Requirement |
| MER | Mileu-Effect Rapportage |
| MER | Minimum Essential Requirement |
| MER | Miscellaneous Expense Report |
| MER | Maintenance Evaluation Report |
| MER | Mission Essential Requirement |
| MER | Manpower Estimate Relationship |
| MER | Minimum Energy Route |
| MER | MITEC Early Release |
| MER | Multi-Echelon Reporting |
| MER | Maritime Environmental Response |
| MER | Marriage Enrichment Requirement (Marine Corps chaplains) |
| MER | Mitigated Emergency Receiver |
| MER | Minor Element Ratio |
| MER | Materials Examination Report |
| MER | Marketing Expense Ratio (finance) |
| MER | Melamine Ether Resins |
| MER | Medication Errors Reporting (healthcare) |
| MER | Media Efficiency Ratio (advertising) |
| MER | Major Expenditure Request |
| MER | Minimum Equipment Requirements (sailing races) |
| MER | Medicaid Estate Recovery (est. 1995) |