FIWG
| Acronym | Definition |
|---|---|
| FIWG | Financial Internet Working Group (est. 2000) |
| FIWG | Fiets Is Weer Gestolen (Dutch: Bike is Stolen Again) |
| FIWG | Functional Integration Working Group |
| FIWG | FUDS (Formerly Used Defense Sites) Improvement Working Group (US DoD) |
| FIWG | Factory Integration Working Group |
| FIWG | Forecast International Weapons Group (Newtown, CT) |