| Acronym | Definition |
|---|
| HOS➣Hostile |
| HOS➣Houston (Amtrak station code; Houston, TX) |
| HOS➣Hospitality |
| HOS➣Hours of Service |
| HOS➣Hosea |
| HOS➣House of Secrets |
| HOS➣Head of Section |
| HOS➣Head of Scrutiny (UK) |
| HOS➣Holt-Oram Syndrome |
| HOS➣Human Organ Systems (class) |
| HOS➣Head of State (political title) |
| HOS➣Head of School |
| HOS➣Higher Order Statistics |
| HOS➣High Level Operations Software |
| HOS➣Hidden Object Scene (gaming) |
| HOS➣Health Outcomes Survey (Medicare survey) |
| HOS➣Higher-Order Statistics |
| HOS➣Higher Order Surface |
| HOS➣Head of Sales (various locations) |
| HOS➣Hands on Sacramento (California) |
| HOS➣Home Orchard Society |
| HOS➣Hands-On Science (educational program) |
| HOS➣Heckscher-Ohlin-Samuelson (economics) |
| HOS➣High Order Software |
| HOS➣Host Operating System |
| HOS➣Hrvatske Obrambene Snage (Croatian Defence Forces) |
| HOS➣High Order Shims (imaging) |
| HOS➣Higher Order Software |
| HOS➣Halls of Stone (World of Warcraft) |
| HOS➣Home Of Selection |
| HOS➣Human Operator Simulator |
| HOS➣Husband Over Shoulder |
| HOS➣Hrvatski Odbojkaški Savez (Croatian Volleyball Federation) |
| HOS➣Healing Our Spirit (Vancouver, BC) |
| HOS➣Head Office System |
| HOS➣Home Office Specimen (life/health insurance underwriting) |
| HOS➣Hardy Orchid Society (UK) |
| HOS➣Helicopter Oxygen System |
| HOS➣Harnessing of Spirit (gaming) |
| HOS➣Holiday Oceanview Samal |
| HOS➣Hang Off Sub (oilfield) |
| HOS➣Highway Operations System |
| HOS➣Heavy Oilfield Services (gas compressor) |
| HOS➣Horizontal Over Scan (TV) |
| HOS➣Helicopter Observation System |