| Acronym | Definition |
|---|
| PIAS➣Play It Again Sam (record label) |
| PIAS➣Play It Again Sports (chain of used sports equipment stores) |
| PIAS➣Protein Inhibitor of Activated Signal (protein) |
| PIAS➣Professional Investment Advisory Services (financial services; Singapore) |
| PIAS➣Program for the Integral Approach of Ship Design (naval software; Netherlands) |
| PIAS➣Presque Isle Audubon Society (Pennsylvania) |
| PIAS➣Photon-counting Image Acquisition System |
| PIAS➣PLRS Intelligence Augmentation System |