English abbreviations from hrt to hsa
- HRT (Hormone Replacement Therapy)
- HRTEM (High-Resolution Transmission Electron Microscopy)
- HRTI (Hay River Transition Initiative)
- HRU (Heading Reference Unit)
- hrv (Croatian language (ISO 639-2 code))
- HRW (Human Rights Watch)
- HRWC (Huron River Watershed Council)
- HRWSR (High-Resolution Weather Satellite Receiver)
- HRY (Henbury Airport)
- HRZ (Horizontina Airport)
- HS (Headquarters Squadron - Marine Wing Support Group (USMC))
- H.S. (Hic Situs ("Laid Here"))
- HSA (Home and School Association)
