| 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 |