| Acronym | Definition |
|---|
| ISIG➣Internet Special Interest Group |
| ISIG➣Information Systems and Innovation Group (London School of Economics and Political Science) |
| ISIG➣Information Security Interest Group (New Zealand) |
| ISIG➣Istituto Storico Italo Germanico (Italian: Italo-German Historical Institute; Bruno Kessler Foundation) |
| ISIG➣Innovation Summit Implementation Group (Australia) |
| ISIG➣Internet Special Interest Group (BCS) |
| ISIG➣International Special Interest Group (various organizations) |