| HERO | Electromagnetic Radiation Hazards 
| Others |
| HERO | Haemophilia Experiences Results and Opportunities
| Others |
| HERO | Haemophilia Experiences Results Opportunities
| Others |
| HERO | Hale Empowerment and Revitalization Organization
| Others |
| HERO | Hale Empowerment Revitialization Organization
| Others |
| HERO | Have Everything Ready and Organized
| Others |
| HERO | Hazards of Electromagnetic Radiation to Ordnance
| Others |
| HERO | Headquarters Emergency Response Officer
| Others |
| HERO | Heal Educate Reach Overcome
| Others |
| HERO | Health and Environmental Research Online
| Others |
| HERO | Health Easy Read Online
| Others |
| HERO | Health Education Reaching Out
| Others |
| HERO | Health Educational and Rural Outreach
| Others |
| HERO | Health Empowerment, Responsibility, and Opportunity
| Others |
| HERO | Health Enhancement Research Organization
| Others |
| HERO | Health Enhancement Resources and Organizations
| Others |
| HERO | Health Environment Regional Organisation
| Others |
| HERO | Health Environmental Research Online
| Others |
| HERO | Health Equipment Recycling Organization
| Others |
| HERO | Healthcare Employees Reaching Out
| Others |
| HERO | Healthcare Equipment Recycling Organization
| Others |
| HERO | Helicopter Emergency Reconnaissance Observer
| Others |
| HERO | Helicopter Emergency Rescue Operation
| Others |
| HERO | Hell Ever Rally On
| Others |
| HERO | Help Everyone Respect Others
| Others |
| HERO | Help Expand Recreation Opportunities
| Others |
| HERO | Helpful, Encouraging, Respectful, and Outstanding
| Others |
| HERO | Helping Earths Rainforests Organization
| Others |
| HERO | Helping Every Robot Organization
| Others |
| HERO | Helping Everybody Respect Others
| Others |
| HERO | Helping Everyone Reach Out
| Others |
| HERO | Helping Everyone Reach Outcomes
| Others |
| HERO | Helping Everyone Read Outstandingly
| Others |
| HERO | Helping Everyone Respect Others
| Others |
| HERO | Hemophilia Experiences Results and Opportunities
| Others |
| HERO | Hendrick Equine Rehabilitation Opportunities
| Others |
| HERO | Hendricks Equine Rehabilitation Opportunities
| Others |
| HERO | Heroic Effort Recognition Opportunity
| Others |
| HERO | High Efficiency Rating Optical
| Others |
| HERO | High Energy Replicated Optics
| Others |
| HERO | High Energy Rockin Oldies
| Others |
| HERO | Higher Education and Research Opportunities
| Others |
| HERO | Highglen Exploration and Research Organization
| Others |
| HERO | Highway Emergency Response Operator
| Others |
| HERO | His Early Righteous Ones
| Others |
| HERO | Historic Endurance Rallying Organisation
| Others |
| HERO | Home Economic Related Occupation
| Others |
| HERO | Home Economics Related Occupations
| Others |
| HERO | Home Emergency Resource Officer
| Others |
| HERO | Home Energy Ratings of Ohio
| Others |
| HERO | Home Energy Renovation Opportunities
| Others |
| HERO | Home Energy Renovation Opportunity
| Others |
| HERO | Homeless Empowerment Relationship Organization
| Others |
| HERO | Homework Echievemant Reward Opportunity
| Others |
| HERO | Honoring Effective Relationship Opportunities
| Others |
| HERO | Hoosier Emergency Response Olympics
| Others |
| HERO | Horseshoe Employees Reaching Out
| Others |
| HERO | How To Enhance Results Online
| Others |
| HERO | Human Education Resource Officer
| Others |
| HERO | Human Environment Regional Observatory
| Others |
| HERO | Human Exploitation Rescue Operative
| Others |
| HERO | Hunchback Esmarelda Rescue Operation
| Others |
| HERO | Hutchinson Employees Reaching Out
| Others |