| Rank | Abbreviation | Meaning |
|---|
| ***** | HRHS | Hypoplastic Right Heart Syndrome
| |
| ***** | HRHS | Human Rights and Human Services
| |
| ***** | HRHS | Health Related Hardiness Scale
| |
| **** | HRHS | Halifax Regional Health System's
| |
| **** | HRHS | Harrisonburg Rockingham Historical Society
| |
| **** | HRHS | Highlands Ranch High School (Higlands Ranch, CO)
| |
| **** | HRHS | Horse Race Handicapping Systems
| |
| **** | HRHS | High Resolution Hadron Spectrometer
| |
| **** | HRHS | Heritage Regional High School
| |
| *** | HRHS | Howard Regional Health System (Indiana)
| |
| *** | HRHS | Holy Rosary High School (Lloydminster, Alberta, Canada)
| |
| *** | HRHS | Hickory Ridge High School (Harrisburg, NC)
| |
| *** | HRHS | Halifax Regional Health System
| |
| ** | HRHS | Hampshire Regional High School (Westhampton, MA)
| |
| ** | HRHS | Hunter River High School
| |
| ** | HRHS | Holy Redeemer High School
| |
| ** | HRHS | Hampton Roads Homeschool Sports
| |
| ** | HRHS | Henry Radford Hope School
| |
| ** | HRHS | Holy Redeemer Health System
| |