| NHTSA | National Highway Traffic Safety Administration |
|---|---|
| NIOSH | National Institute for Occupational Safety and Health |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| OSHA | Occupational Safety and Health Adminstration |
| OSH | Act Occupational Safety and Health Act of 1970 |
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