| HEM | Hallelujah English Ministry 
| Others |
| HEM | Hand Eye Mouth
| Others |
| HEM | Headlamp Motor
| Others |
| HEM | Health e Messaging
| Others |
| HEM | Health Engagement Model
| Others |
| HEM | Healthcare Engineering and Management
| Others |
| HEM | Healthy Ecological Mobile
| Others |
| HEM | Heat Exchanger Method
| Others |
| HEM | Heavy Equipment Maintenance
| Others |
| HEM | Hecho en Mexico
| Others |
| HEM | Hexane Extractable Material
| Others |
| HEM | Hexane Extractable Materials
| Others |
| HEM | Hide Evidence of Malfunction
| Others |
| HEM | High Efficiency Module
| Others |
| HEM | Higher Education at the Margins
| Others |
| HEM | Historical Electronics Museum
| Others |
| HEM | Hitchhike Experiment Module
| Others |
| HEM | Holzapfel Effective Microbes
| Others |
| HEM | Home Education Magazine
| Others |
| HEM | Home Energy Management
| Others |
| HEM | Home Energy Manager
| Others |
| HEM | Home of Elan Ministries
| Others |
| HEM | Household Expenditure Measure
| Others |
| HEM | Household Expenditure Model
| Others |
| HEM | Human Epidermal Model
| Others |
| HEM | Hydraulic Engine Mount
| Others |
| HEM | Hydrocapsule Encapsulation Machine
| Others |
| HEM | Hydrogenic Effective Mass
| Others |
| HEM | Hydrography Event Management
| Others |