| Acronym | Definition |
|---|
| IPES | Improved Pes |
| IPES | Improved Proposed Encryption Standard (cryptography) |
| IPES | Inverse Photoemission Spectroscopy |
| IPES | International Police Executive Symposium |
| IPES | International Payments for Ecosystem Services (UN Environment Program) |
| IPES | Information Processing Equipment and Software |
| IPES | Instituto Peruano de Economía Social (Spanish: Peruvian Institute of Social Economy) |
| IPES | Imus Pilot Elementary School |
| IPES | Integrated Platform Electronics and Sensors |
| IPES | International Personnel Exchange System |
| IPES | Internet Protocol Edge Services |
| IPES | Institut de Préparation aux Enseignements du Second Degré (French: Secondary Education Preparation Institute) |
| IPES | International Production Enterprise System |