HCM
- Eyl Airport
- HCM Rajasthan State Institute of Public Administration
- Halifax Conservatory of Music
- Harish Chandra Mathur
- Harrow Central Mosque
- Hausdorff Center for Mathematics
- Hierarchical Clustering Method (asteroids)
- Highway Capacity Manual
- Historical-critical method
- Hitachi Construction Machinery
- Ho Chi Minh
- Ho Chi Minh City
- Hypertrophic cardiomyopathy