| HRT | Hair Regain Treatment 
| Others |
| HRT | Hamburger Replacement Therapy
| Others |
| HRT | Hampton Roads Transit
| Others |
| HRT | Hartwell Railroad
| Others |
| HRT | Hartwell Railroad Company
| Others |
| HRT | Have Randy Thoughts
| Others |
| HRT | Healing and Restoration Team
| Others |
| HRT | Healthy And Ready To
| Others |
| HRT | Heidelberg Retina Tomograph
| Others |
| HRT | Heidelberg Retinal Tomograph
| Others |
| HRT | Hellenic Rescue Team
| Others |
| HRT | Herbal Relief Therapy
| Others |
| HRT | Herbert R Thomas
| Others |
| HRT | Hextech Repair Tool
| Others |
| HRT | High Rate Tape
| Others |
| HRT | High Resolution Technologies
| Others |
| HRT | High Resolution Technology
| Others |
| HRT | High Resolution Thermometer
| Others |
| HRT | High Resolution Time
| Others |
| HRT | High Resolution Tracker
| Others |
| HRT | High Rise Terminal
| Others |
| HRT | High Rise Terminals
| Others |
| HRT | High Rising Terminal
| Others |
| HRT | Higher Rank Tensor
| Others |
| HRT | Highway Regulating Team
| Others |
| HRT | Hilarious Riotous Topical
| Others |
| HRT | Hispania Racing Team
| Others |
| HRT | Hispanic Racing Team
| Others |
| HRT | Historic Rally Trophy
| Others |
| HRT | Hoarding Response Team
| Others |
| HRT | Holden Racing Team
| Others |
| HRT | Holden Ratchasing Team
| Others |
| HRT | Home Range Tools
| Others |
| HRT | Honda Racing Team
| Others |
| HRT | Hoosier Racing Tires
| Others |
| HRT | Horizontal Return Tubular boiler
| Others |
| HRT | Hormonal Replacement Therapy
| Others |
| HRT | Hormone replacement
| Others |
| HRT | Hormone Replacement Therapy
| Others |
| HRT | Hormone Therapy
| Others |
| HRT | Hostage Rescue Team
| Others |
| HRT | Hostage Retrieval Team
| Others |
| HRT | Hrvatska Radio-Televizija
| Others |
| HRT | Huddle Room Technology
| Others |
| HRT | Hudson River Trading
| Others |
| HRT | Human Resources Toolkit
| Others |
| HRT | Human Rights Trust
| Others |
| HRT | Humility Respect and Trust
| Others |
| HRT | Humor Replacement Theory
| Others |
| HRT | Humor Replacement Therapy
| Others |
| HRT | Hydraulic Retention Time
| Others |
| HRT | Hyper Race Traitor
| Others |
| HRT | Hysterectomy
| Others |