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| English | Thesaurus |
| Earth Resources Observational System Program | EROS |
| EU Emission Trading System | EU-ETS (MichaelBurov) |
| EU Emission Trading System | EUETS (MichaelBurov) |
| EU Emission Trading System | EU ETS (MichaelBurov) |
| EU Emissions Trading System | EU-ETS (MichaelBurov) |
| EU Emissions Trading System | EUETS (MichaelBurov) |
| EU Emissions Trading System | EU ETS (MichaelBurov) |
| International Solar System Program | ISSP |
| Marine Meteorological Services System | MMSS |