| Acronym | Definition |
|---|
| ISTP | Integer Store and Pop |
| ISTP | International Solar Terrestrial Physics (platform) |
| ISTP | Index to Scientific & Technical Proceedings |
| ISTP | Institut Supérieur des Techniques de la Performance (French: Higher Institute of Technical Performance; engineering school) |
| ISTP | International Symposium on Transport Phenomena |
| ISTP | Institute for Sustainability and Technology Policy |
| ISTP | In-Service Training Programme (Bamenda, Cameroon) |
| ISTP | International Solar-Terrestrial Program |
| ISTP | Institute of Solar-Terrestrial Physics (Russia) |
| ISTP | Introverted Sensing Thinking Perceiving (Myers-Briggs personality type indicator) |
| ISTP | Internet Signaling Transport Protocol |
| ISTP | Instituto Superior de Transportes (Portugal) |
| ISTP | I See The Problem |
| ISTP | Integrated System Test Plan |