ESS

• Ernestown Secondary School, in Odessa, Ontario
• European Standard School, in Dhaka, Bangladesh

• Economic System of Socialism, an East German economic policy
• Emergency Social Services, in British Columbia, Canada
• Emergency special session of the United Nations General Assembly (ESS of UNGA), an unscheduled meeting of the general assembly

• Barbara Ess (1948-2021), American photographer
• Brandon Ess (born 1971), German cricketer
• Émile Ess (1932–1990), Swiss rower
• Gene Ess, Japanese-American guitarist

• Earth system science
• Empty sella syndrome
• Epworth Sleepiness Scale
• European Social Survey
• European Spallation Source, a nuclear research facility
• Euthyroid sick syndrome
• Evolutionarily stable strategy
• Explained sum of squares
• Effective sample size

• ES Sétif, an Algerian professional football club
• Étoile Sportive du Sahel, a Tunisian football club
• Extreme Sailing Series, a series of sailing regattas
• Eye Safety Systems, one of major manufacturer of tactical eye protection

• Electronic switching system, an automated telephone exchange
• Emergency stop signal, on automobiles
• Energy storage system
• Environmental Sensor Station
• Environmental stress screening
• ESS Technology, an American multimedia technology manufacturer
• Experimental SAGE Subsector, a prototype Cold War Air Defense Sector

• Emacs Speaks Statistics
• Emotion-sensitive software
• Extended Service Set, a wireless networking unit
• IBM Enterprise Storage Server

• S, the letter
• Central Siberian Yupik language
• Essex, England
• Essen/Mülheim Airport in Germany
• Employee self-service
• Eurest Support Services, a British food services company
• Eternal Subordination of the Son, theological position

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