| Acronym | Definition |
|---|
| SDH | Synchronous Digital Hierarchy |
| SDH | Sboru Dobrovolných Hasicu (Czech: Fire Fighters) |
| SDH | Succinate Dehydrogenase |
| SDH | System Development Handbook |
| SDH | Systematized Digital Hardware |
| SDH | Spatial Data Handling |
| SDH | Social Determinants of Health |
| SDH | Subdural Hematoma |
| SDH | Sorbitol Dehydrogenase |
| SDH | San Diego Hospice (San Diego, CA) |
| SDH | Swiss Deluxe Hotels |
| SDH | Succinate-Ubiquinone Oxidoreductase |
| SDH | Saccharopine Dehydrogenase (biochemistry) |
| SDH | Society for Digital Humanities (Canada) |
| SDH | Software Development Handbook |
| SDH | Super Duper High |
| SDH | System Definition Handbook (US NASA) |
| SDH | Subtitles for the Deaf & Hard of Hearing |
| SDH | Side Drilled Hole |
| SDH | Stammdienststelle des Heeres (German) |
| SDH | Standard Data Header |
| SDH | Société des Droits de l'Homme (French: League of Human Rights) |
| SDH | Sleep Deprivation Headache |
| SDH | Signal Degradation-Handoff |
| SDH | Skill Dynamics Hypothesis |
| SDH | Standard Digital Hierarchy |