EGS

• Enfield Grammar School, an English school
• Ermysted's Grammar School, an English school
• European Graduate School, a Swiss private university

• Edinburgh Geological Society
• EGS (program), a Monte Carlo simulation program
• Ehlers–Geren–Sachs theorem
• Enhanced geothermal system
• European Geophysical Society, now part of the European Geosciences Union

• Emergency gas supply, a backup life support system for underwater diving
• Enhanced Graphics System, on the Amiga computer
• Epic Games Store, a digital video game storefront
• Ergis (company), a Polish chemical company
• Experimental Geodetic Satellite, a Japanese satellite
• Exploration Ground Systems, a NASA program

• Ecological goods and services
• Egilsstaðir Airport in Iceland
• El Goonish Shive, a webcomic by Keenspot CTO Dan Shive
• Expert Global Solutions, a defunct American debt collection agency

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