ISIG
| 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) |