| Acronym | Definition |
|---|
| ISPA | Internet Service Providers Association |
| ISPA | International Spa Association |
| ISPA | Istituto di Scienze delle Produzioni Alimentari |
| ISPA | Instrument for Structural Policies for Pre-Accession |
| ISPA | Instituto Superior de Psicologia Aplicada (Portugal) |
| ISPA | Internet Service Providers Austria |
| ISPA | International Sleep Products Association |
| ISPA | International Symposium on Parallel and Distributed Processing and Applications |
| ISPA | International School Psychology Association |
| ISPA | Institut Supérieur de Plasturgie d'Alençon (French: Alençon Higher Institute of Plastics; Alençon, France) |
| ISPA | International Society of Parametric Analysts |
| ISPA | Instrument for Structural Policy for Pre-Accession (EU) |
| ISPA | International SharePoint Professionals Association (software) |
| ISPA | International Skat Players Association (German card game) |
| ISPA | ISDN Packet (Driver) |
| ISPA | Illinois School Psychologists Association |
| ISPA | Istituto Sperimentale Psicodinamica Applicata (Italian: Research Institute of Applied Psychotherapy) |
| ISPA | Irish Social Policy Association |
| ISPA | Iowa School Psychologists Association |
| ISPA | Institute of Space and Planetary Astrophysics |
| ISPA | Internet Spyware Prevention Act |
| ISPA | Idaho State Police Association (Meridian, Idaho) |
| ISPA | Indiana State Police Alliance |
| ISPA | Image and Signal Processing Analysis (International Symposium) |
| ISPA | Information Systems Process Assessment |
| ISPA | Internal Shorted Patch Antenna |
| ISPA | Initial State Probability Algorithm |