HMC
- Hamad Medical Corporation
- Hamamatsuchō Station
- Hamiltonian Monte Carlo
- Hampton Court railway station
- Hardware Management Console
- Harris Manchester College, Oxford
- Harvard Management Company
- Harvard Model Congress
- Harvey Mudd College
- Headmasters' and Headmistresses' Conference
- Heerema Marine Contractors
- Hero Motors Company
- Herzliya Medical Center
- Holocaust Memorial Center
- Holyoke Machine Company
- Holyoke Medical Center
- Honda
- Hornady
- Hospital corpsman
- Hybrid Memory Cube
- Hyundai Motor Company
- PCI Express Mini Card
- Royal Commission on Historical Manuscripts
- Ship prefix