HMI
- Azepane
- HD Mining International
- HMI Hotel Group
- Hahn-Meitner-Institut
- Hami Airport
- Hammond-Whiting station
- Hanson Musical Instruments
- Hartz Mountain Industries
- Helioseismic and Magnetic Imager
- Her Majesty's Inspectorate of Education
- Hetrick-Martin Institute
- High Mountain Institute
- Himalayan Mountaineering Institute
- Holistic Management International
- HornAfrik Media Inc
- Hotel Meliá
- Houston Mechatronics, Inc
- Hualien Media International
- Human–machine interaction
- Human–machine interface
- Hydrargyrum medium-arc iodide lamp
- Muslim Students' Association (Indonesia)
- Northern Huishui Miao language