HLOS
| Acronym | Definition |
|---|---|
| HLOS | High Level Output Specification |
| HLOS | Hardware Limited Operation Strategy (cars; failure prevention) |
| HLOS | High Level Output Statement (UK Department of Transport) |
| HLOS | High Level Operating System |
| HLOS | Hospital Length of Stay |
| HLOS | Harpenden Light Operatic Society (UK) |
| HLOS | Hypertensive Lower Oesophageal Sphincter |