| Acronym | Definition |
|---|
| OHRA➣Open Hypermedia Reference Architecture |
| OHRA➣Office of Reconstruction and Humanitarian Assistance (Iraq) |
| OHRA➣Ontario Health Research Alliance (Canada) |
| OHRA➣Olde Hanwell Residents Association (UK) |
| OHRA➣Ontario Health Record Association (now Ontario Health Information Management Association; Canada) |
| OHRA➣Ozarks Hunting Retriever Association (Arkansas) |
| OHRA➣Occupational Health Risk Assessment Questionnaire |