| Rank | Abbreviation | Meaning |
|---|
| ***** | HOAP | Home Ownership Assistance Program
| |
| **** | HOAP | Homeless Outreach and Advocacy Program
| |
| *** | HOAP | Homeless Outreach and Advocacy Project
| |
| *** | HOAP | HP1/ORC-associated protein
| |
| *** | HOAP | Heart of Albion Press
| |
| *** | HOAP | Helping Oppressed and Powerless
| |
| *** | HOAP | Health for Older Adults Program
| |
| ** | HOAP | Hiroshima Office for Asia and the Pacific
| |
| ** | HOAP | Health Outcomes Assessment Program
| |
| ** | HOAP | Home Ownership Affordability Partnership
| |
| ** | HOAP | Horizon Organic Agriculture Project
| |
| * | HOAP | Home Owner Assistance Program
| |
| * | HOAP | Homeless in Oswestry Action Partnership
| |
| * | HOAP | Heavy Oil Alberta Project
| |
| * | HOAP | Hackers on a Plane
| |
| * | HOAP | Humanoid for Open Architecture Platform (Fuuitsu Automation robots; Japan)
| |
| * | HOAP | Harmonisation in Overseas Audit Practices
| |
| * | HOAP | Home Ownership Advisory Panel of the NHF
| |
| * | HOAP | heart of america press
| |
| * | HOAP | Holt Online Assessment Platform
| |
| * | HOAP | Homeownership Opportunity Assistance Program
| |
| * | HOAP | Heads of Academic Programmes
| |