| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
|---|---|
| OILD | occupational immunologic lung disease |
| OMAS | occupational maladjustment syndrome |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| OSHA | Occupational Safety and Health Adminstration |