| IPSP | Internet Protocol Security Policy (IETF) | 因特网协议安全策略（IETF） |
| IPSP | International Parliament for Safety and Peace | 国际安全与和平议会 |
| IPSP | Instituto de PrevisiÓn Social del Periodista (Guatemala) | Instituto de PrevisiÓn Social del Periodista (Guatemala) |
| IPSP | inhibitory post-synaptic potential | 抑制性突触后电位 |
| IPSP | Internet Payment Service Provider | 互联网支付服务提供商 |
| IPSP | Internet Protocol Security Protocol | Internet协议安全协议 |
| IPSP | Inhibitory Postsynaptic Potential | 抑制性突触后电位 |
| IPSP | Intelligence Priorities for Strategic Planning | 战略计划用优先情报项目 |