| Rank | Abbreviation | Meaning |
|---|
| ***** | UHN | Ulrich Humberg Nottuln
| |
| **** | UHN | unreamed humeral nail
| |
| **** | UHN | United Houma Nation (Native American tribe; Louisiana)
| |
| **** | UHN | Unreamed Humerus Nail
| |
| **** | UHN | University Health Network (Canada)
| |
| *** | UHN | Unit Hub Node
| |
| *** | UHN | University of Hamburg Nuclear
| |
| *** | UHN | UNTERNEHMENSVERBÄNDE HANDWERK NIEDERSACHSEN
| |
| *** | UHN | Universal Health Network
| |
| *** | UHN | United Hackers Network (hacker group)
| |
| ** | UHN | Unique Home Node
| |
| ** | UHN | US Heating Oil (American Stock Exchange [AMEX])
| |
| ** | UHN | Urban Houston Network
| |
| ** | UHN | Universal Healing Network
| |
| * | UHN | Universal History of Numbers
| |
| * | UHN | United Houma Nation
| |
| * | UHN | urinary hippurate nitrogen
| |
| * | UHN | Uranyl Hexahydrate Nitrate
| |
| * | UHN | University Hospital Network
| |
| * | UHN | United Hands to Nepal
| |
| * | UHN | Urs-Heinz Naegeli
| |
| * | UHN | University Health Network's
| |
| * | UHN | Universidad Health Network
| |
| * | UHN | United Health Network
| |
| * | UHN | Universitas HKBP Nommensen
| |