| Abbreviation | Definition |
|---|---|
| HOM | Herbalife Opportunity Meeting |
| HOSA | Workshop on Higher-Order Spectral Analysis |
| HOSC | Hearing Officer Settlement Conference |
| HOSI | Hotel Operations Summit India |
| HOTOS-VII | 7th Workshop on Hot Topics in Operating Systems |
| HOW | Horse Owners Workshop |
| HPCA | International Symposium on High-Performance Computer Architecture |
| HPDC | IEEE International Symposium on High Performance Distributed Computing |
| HPSR | Workshop on High Performance Switching and Routing |
| HRDF | Hastings Rother Disability Forum |
| HRDF | Hlanganani Regional Development Forum |
| HRDF | Human Resource Directors Forum |
| HSBS | Health Science and Biomedical Systems |
| HSC | International Workshop on Hardware/Software Co-design |
| HSLC | High School Leadership Conference |
| HSLC | Hoosier Southern Lacrosse Conference |
| HSOC | High School Outreach Conference |
| HSPIC | Healthcare Systems Process Improvement Conference |
| HSRC | Harvard Science Research Conference |
| HTSC | High Tech Steel Conference |