| HARD | Hyper Attachment - Reconstructional DNA | 超附着-重建DNA |
| HARD | High Accuracy Retrieval from Documents | 从文档中高精度检索 |
| HARD | Helmet Assisted Radar Detection | 头盔辅助雷达探测 |
| HARD | Horizontal Acoustic Range Depiction | 水平声距图 |
| HARD | Hayward Area Recreation and Park District | 海沃德地区休闲和公园区 |
| HARD | Health Advantage Research and Development (Nutrition) | 健康优势研究与开发（营养学） |
| HARD | Hydrocephalus, Agyria, and Retinal Dysplasia (syndrome) | 脑积水、乏力和视网膜发育不良（综合征） |
| HARD | Hardware Assisted Resilient Data (Oracle) | 硬件辅助恢复数据（Oracle） |
| HARD | Novex Systems International | Novex Systems International公司 |