| HARP | Hackers Against Racial Parties 
| Others |
| HARP | Hardware Alternate Reality Puzzle
| Others |
| HARP | HCQIS Access Roles and Profile
| Others |
| HARP | Healing Arts Radiation Protection
| Others |
| HARP | Health Administration Responsibility Project
| Others |
| HARP | Health And Recovery Peer program
| Others |
| HARP | Health And Recovery Plan
| Others |
| HARP | Health and Recovery Plans
| Others |
| HARP | Health Assessment and Recovery Program
| Others |
| HARP | Health Assurance Retirement Plan
| Others |
| HARP | Healthcare Accounts Receivable Processor
| Others |
| HARP | Heating Appliances Retrofit Planning
| Others |
| HARP | Heterogeneous Architecture Research Platform
| Others |
| HARP | High Adventure Role Playing
| Others |
| HARP | High Altitude Release Point
| Others |
| HARP | High Altitude Research Program
| Others |
| HARP | High Altitude Research Project
| Others |
| HARP | High Area Rapid Printing
| Others |
| HARP | High-Altitude Research Program
| Others |
| HARP | High-Assurance Rapid Prototyping
| Others |
| HARP | Historic Arkansas Riverwalk of Pueblo
| Others |
| HARP | HMI Active Region Patch
| Others |
| HARP | Home Affordability Refinance Program
| Others |
| HARP | Home Affordable Refinance Program
| Others |
| HARP | Homeowner Assistance and Reimbursement Programs
| Others |
| HARP | Hometown Area Recruiting Program
| Others |
| HARP | Hotspots Analysis and Reporting Program
| Others |
| HARP | Housing Assistance Resources Portal
| Others |
| HARP | Humanistic American Religious Party
| Others |
| HARP | Humanitarian Assistance Response Plan
| Others |
| HARP | Hybrid Array Ring Processor
| Others |
| HARP | Hyperbolic Analyzer Retarding Potential
| Others |
| HARP | Hyperloop Advanced Research Partnership
| Others |
| HARP | Hyundai Approved Repairer Program
| Others |