| HASI | Hannon Armstrong Sustainable In 
| Others |
| HASI | Hannon Armstrong Sustainable Infrastructure
| Others |
| HASI | Hanon Automotive Systems India
| Others |
| HASI | Hayes Ability Screening Index
| Others |
| HASI | Hellenic Archives of Scientific Instruments
| Others |
| HASI | Home Adaptations for Seniors Independence
| Others |
| HASI | Housing and Accommodation Support Initiative
| Others |
| HASI | Housing and Support Initiative
| Others |
| HASI | Hubbard Association of Scientologists International
| Others |
| HASI | Huygens Atmospheric Structure Instrument
| Others |