ESO

Acronym	Definition
ESO	European Southern Observatory
ESO	European Organisation for Astronomical Research in the Southern Hemisphere
ESO	Educación Secundaria Obligatoria (Spain: compulsory secondary education)
ESO	Enseñanza Secundaria Obligatoria (Spain Eeducational system)
ESO	European School of Oncology
ESO	Edmonton Symphony Orchestra (Canada)
ESO	Employee Stock Option
ESO	Executive Stock Option
ESO	Ensemble Studios Online
ESO	Equipment Smarter than Operator
ESO	Extended Sexual Orgasm
ESO	Ecord Science Operator
ESO	Electrical Safety Office
ESO	Environment Society of Oman
ESO	Elgin Symphony Orchestra (Elgin, IL)
ESO	External Security Organization (Hezbollah)
ESO	English Symphony Orchestra
ESO	European Standardisation Organisation
ESO	Equipment Superior to Operator
ESO	Ether Saga Online (gaming)
ESO	Educational Services Office(r)
ESO	Extended Security Option
ESO	Environmental Science Officer
ESO	Ecological Services Outsourcing (Italy)
ESO	Enterprise Service Optimization
ESO	East Side Oakland (California)
ESO	Explosives Safety Officer
ESO	Emergency Service Operations
ESO	Electronics Supply Office
ESO	Enligt Senare Order (Swedish: until further orders)
ESO	Emergency Security Option(s)
ESO	Emergency Service Override
ESO	European Settlements Office (banking)
ESO	Expanded Service Option (tape format for packaging software upgrades applied to IBM mainframe systems)
ESO	Estimated Sign Off
ESO	Engine Shutdown Override
ESO	Emergency Support Office
ESO	Environmental Services Operations
ESO	Electronic Sales Order
ESO	East Side Office
ESO	Engage Standard Order
ESO	Electronic Supply Officer
ESO	Equal Selection Opportunities
ESO	External Signaling Option
ESO	Evil Shop Owner