| ISPR | Illinois Staff Physician Recruiters 
| Others |
| ISPR | Implantable Systems Performance Registry
| Others |
| ISPR | In situ product removal
| Others |
| ISPR | Incident Specific Preparedness Review
| Others |
| ISPR | Income Security Program Redesign
| Others |
| ISPR | Indian Society of
| Others |
| ISPR | Institute of Socio-Political Research
| Others |
| ISPR | Integrated System of Participation in Research
| Others |
| ISPR | Inter Service Public Relations
| Others |
| ISPR | Inter Services Public Relations
| Others |
| ISPR | Inter-Service Public Relations
| Others |
| ISPR | Inter-Services Public Relations
| Military |
| ISPR | International Society for Paranormal Research
| Others |
| ISPR | International Society for Presence Research
| Others |
| ISPR | International Society of Photosynthesis Research
| Others |
| ISPR | International Standard Payload Rack
| Others |