| Acronym | Definition |
|---|
| MES | 2-(N-Morpholino)ethanesulfonic Acid |
| MES | Manufacturing Execution Systems |
| MES | Mis En Scene (film terminology) |
| MES | Matières En Suspension (French) |
| MES | Master of Environmental Studies (degree) |
| MES | Methanesulfonic Acid |
| MES | Minimum Efficient Scale (economics) |
| MES | Mobile Earth Station (INMARSAT) |
| MES | Marconi Electronic Systems |
| MES | Marine Evacuation System |
| MES | Microembolic Signals (transcranial doppler monitoring) |
| MES | Military Engineering Services |
| MES | Maximal Electroshock Seizure (test) |
| MES | Ministério do Equipamento Social (Portuguese Ministry for the Social Equipment) |
| MES | Muslim Educational Society |
| MES | Main Engine Start |
| MES | Master of Environmental Science (degree) |
| MES | Miniature Edison Screw (type of cap on electric bulb) |
| MES | Medan, Indonesia - Polonia (Airport Code) |
| MES | McMaster Engineering Society (McMaster University, Hamilton, Ontario, Canada) |
| MES | Microsoft Exchange System |
| MES | Mobile End System |
| MES | Medical Equipment Sets |
| MES | Mississippi Engineering Society |
| MES | Master Earth Station |
| MES | Metro Ethernet Services |
| MES | Marketable Equity Securities |
| MES | Malaysian Endodontic Society |
| MES | Money Ethic Scale |
| MES | Mesquite Elementary School (various locations) |
| MES | Manawatu Evening Standard (New Zealand newspaper) |
| MES | Mitered End Section |
| MES | Miscellaneous Equipment Specifications |
| MES | Mine Effects Simulator |
| MES | Management Engineering Squadron |
| MES | Maintenance Engineering System |
| MES | Mossbauer Emission Spectroscopy |
| MES | Minister for Environment and Science |
| MES | Magnetischer Eigenschutz (German; magnetic self-protection; degaussing device) |
| MES | Measurement Evaluation System (semiconductors) |
| MES | Medical Expense Statement |
| MES | Medium-Energy Source |
| MES | Minimum Efficient Firm Size |
| MES | McMaster Economics Society (McMaster University, Hamilton, Ontario, Canada) |
| MES | Mission Electronic System |
| MES | Maple Equipment Specialists |
| MES | Message Entry System |
| MES | Mechanical Event Simulator |
| MES | Microfilm Exposure System |
| MES | Multilateral Education System |
| MES | Mines Effects Simulation |
| MES | Missing Entire Statement (software fault) |
| MES | Military Essentiality Status |
| MES | Metro Edge Switch |
| MES | Medium Errored Second (31-320 errors/second) |
| MES | Motor End Support |