ESOS may refer to:

• The Energy Savings Opportunity Scheme - a UK scheme compatible with the EU Energy Efficiency Directive
• Enterprise Storage OS - a Linux distribution that serves storage area networks
• Earth Simulator Operating System - the operating system for the Earth Simulator supercomputer
• The Educational Services for Overseas Students Act 2000 or ESOS Act 2000, relevant to Education in Australia

This disambiguation page lists articles associated with the title ESOS.
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