| Abbreviation | Definition |
|---|---|
| HCCA | Howard County Citizens Association |
| HCIA | Harvey Canal Industrial Association |
| HCIA | Hawaii Crop Improvement Association |
| HCIA | Hearing Care Industry Association |
| HCIA | Hellenic Clothing Industry Association |
| HCIA | Hill Country Intergroup Association |
| HCIA | Horizon Communities Improvement Association |
| HCIMA | Hotel Catering and Institutional Management Association |
| HCIMA | Hotel Catering and International Management Association |
| HCIMA | Hotel Catering International Management Association |
| HCLA | Holy Cross Lawyers Association |
| HCLA | Howard County Literacy Association |
| HCMA | Hartford County Medical Association |
| HCMA | Health Care Management Association |
| HCMA | Healthcare Chaplains Ministry Association |
| HCMA | Hillsborough County Medical Association |
| HCPA | Health Care Professionals Associations |
| HCPA | Hertfordshire Care Providers Association |
| HCPA | Historic Catasauqua Preservation Association |
| HCPA | Houston Corporate Paralegal Association |