| IHMS | Immaculate Heart of Mary School 
| Others |
| IHMS | Immaculate Heart of Mary Seminary
| Others |
| IHMS | Indian Hill Middle School
| Others |
| IHMS | Indian Hills Middle School
| Others |
| IHMS | Integrated Health Management Services
| Others |
| IHMS | Integrated Health Management System
| Others |
| IHMS | Integrated Homebuilder Management System
| Others |
| IHMS | Integrated Hospital Management System
| Others |
| IHMS | Integrated Hydrological Modelling System
| Others |
| IHMS | Intelligent Human Machine System
| Others |
| IHMS | Intelligent Human Machine Systems
| Others |
| IHMS | Internal Health and Medical Services
| Others |
| IHMS | International Harari Media Services
| Others |
| IHMS | International Health and Medical
| Others |
| IHMS | International Health and Medical Services
| Others |
| IHMS | International Health Monitoring System
| Others |
| IHMS | International Historic Motorsport Services
| Others |
| IHMS | International Hotel Management School
| Others |
| IHMS | International Human Microbiome Standards
| Others |
| IHMS | Internet Health Monitoring System
| Others |
| IHMS | Iron Horse Middle School
| Others |