| HTCA | Harding Township Civic Association
| Others |
| HTCA | Harvest Temple Christian Academy
| Others |
| HTCA | Harvest Time Christian Academy
| Others |
| HTCA | Healthcare Technologies Challenge Awards
| Others |
| HTCA | Healthcare Technology Collaborators of America
| Others |
| HTCA | Historic Touring Car Association
| Others |
| HTCA | History and Theory of Contemporary Art
| Others |
| HTCA | Holy Trinity Church Aldershot
| Others |
| HTCA | Hormone Therapy Centers of America
| Others |
| HTCA | Human and Technology Capital Advisors
| Others |
| HTCA | Human Tumor Clonogenic Assay
| Others |
| HTCA | Huntington Terrace Citizens Association
| Others |