| HAP | Handicapped Aid Program; Hazardous Air Pollutants [List]; hazardous air pollution; health alliance p... |
|---|---|
| HHA | health hazard appraisal; hereditary hemolytic anemia; home health agency; home health aid; hypothala... |
| ICAA | International Council on Alcohol and Addictions; Invalid Children's Aid Association |
| IOTA | information overload testing aid |
| ITC | imidazolyl-thioguanine chemotherapy; Interagency Testing Committee; in the canal [hearing aid] |