| Acronym | Definition |
|---|
| EQS | Equus Total Return, Inc. (various locations) |
| EQS | Equalizer System |
| EQS | Environmental Quality Standard |
| EQS | Environnement Qualité Sécurité (French: Quality Safety Environment) |
| EQS | Elite Qualifying Segments (United Airlines Mileage Plus) |
| EQS | Environmental Quality Systems |
| EQS | Europe Qualité Services (French: Europe Quality Services) |
| EQS | Equine Quality Spectrum (International Horsemans Institute) |
| EQS | Entangled Quantum State |
| EQS | Extend Quality System (Norway) |
| EQS | Échelle de Qualité de Soins (French: Quality of Care Scale) |
| EQS | Event Query Service |