MES

The abbreviation MES may refer to:

In the military

• Military Engineering Service

In business

• Manufacturing Execution Systems, the intermediary between a business system such as ERP and a manufacturer's plant floor control equipment
• Marconi Electronic Systems, a defunct company of the United Kingdom
• Minimum efficient scale, term used in industrial organization to denote the smallest output that a plant (or firm) can produce such that its long run average costs are minimized

In politics

• Movement of Socialist Left, a former left-wing party in Portugal

In education

• Modern Education Schools, an international language school located in Cairo, Egypt
• Muslim Educational Society, an educational institution in Kerala state of India
• MES Pattambi, a senior secondary school in Kerala; under the Muslim Educational Society Kerala

In computing

• Manufacturing Execution System
• MES-1 to MES-3 - Multilingual European Subsets of Unicode, two sets of glyphs ("characters") that satisfy the requirements of most of the Languages of Europe

In medicine and biology

• Musical ear syndrome
• Modern evolutionary synthesis, the current paradigm in evolutionary biology
• MES (buffer), 2-(N-morpholino)ethanesulfonic acid as a buffering agent in biology and biochemistry

Other

• Marine Evacuation System, lifesaving apparatus fitted to ships
• Members Equity Stadium, a football stadium in Perth, Western Australia
• A preposition (més) in the Catalan language meaning 'more'
• Mark E. Smith, musician in The Fall
• The ICAO airline identifier for Mesaba Airlines
• MES, IATA Code for Medan-Polonia International Airport serving Medan, Indonesia
• Minimum Efficient Scale, an economic concept to denote efficient firm size