| ETWG | East Tennessee Woodworkers Guild 
| Others |
| ETWG | East Texas Writers Guild
| Others |
| ETWG | Economic and Trade Working Group
| Others |
| ETWG | Education and Training Working Group
| Others |
| ETWG | Education Technical Working Group
| Others |
| ETWG | Education Thematic Working Group
| Others |
| ETWG | Educational Technology Working Group
| Others |
| ETWG | Electronic Trading Working Group
| Others |
| ETWG | Elektronische Tijdwaarneming Wedstrijdzwemmen Gelderland
| Others |
| ETWG | Elevation Technical Working Group
| Others |
| ETWG | Emerging Technologies Working Group
| Others |
| ETWG | Emerging Technology Working Group
| Others |
| ETWG | Environmental Taxes Working Group
| Others |
| ETWG | Environmental Testing Working Group
| Others |
| ETWG | Environmental Trade Working Group
| Others |
| ETWG | Environmental Training Working Group
| Others |
| ETWG | Eukaryotic Taxonomy Working Group
| Others |
| ETWG | explosive Transport Working Group
| Others |