| IPSS | Indian Prostate Severity Scale 
| Others |
| IPSS | Inferior Petrosal Sinus Sampling
| Others |
| IPSS | Infrasonic Passive Seismic Spectroscopy
| Others |
| IPSS | Infrastructure Planning Support System
| Others |
| IPSS | Initial Pre-Planned Supply Support
| Others |
| IPSS | Institute for the Psychoanalytic Study of Subjectivity
| Others |
| IPSS | Instituto Peruano De Seguridad Social
| Others |
| IPSS | Integrated Perimeter Security System
| Military, Defence, Facility, Technology, Security |
| IPSS | Integrated Personnel Security System
| Others |
| IPSS | Integrated Plant and Soil Sciences
| Others |
| IPSS | Integrated Process Support System
| Others |
| IPSS | Interactive Photonics Systems Simulator
| Others |
| IPSS | International Packet Switch System
| Others |
| IPSS | International Packet Switched Service
| Others |
| IPSS | International Pediatric Simulation Society
| Others |
| IPSS | International Pediatric Stroke Study
| Others |
| IPSS | International Professional Service Semester
| Others |
| IPSS | International Prognostic Scoring System
| Others |
| IPSS | International Prostate Symptom Score
| Others |
| IPSS | International Prostate Symptoms Score
| Others |
| IPSS | International Prostatism Symptom Score
| Others |
| IPSS | Internet Protocol Solution Showcase
| Others |
| IPSS | Internet Protocol Surveillance System
| Others |
| IPSS | Intrusion Prevention Security Service
| Others |
| IPSS | Ipssinternational Prostate Symptom Score
| Others |
| IPSS | ISBM PhD Seminar Series
| Others |