| Acronym | Definition |
|---|
| IETS➣Instituto de Estudos do Trabalho e Sociedade (Portuguese: Institute for the Study of Labor and Society; Brazil) |
| IETS➣International Embryo Transfer Society |
| IETS➣Inelastic Electron Tunneling Spectroscopy |
| IETS➣Interim European Telecommunications Standard (also seen as I-ETS) |
| IETS➣Integrated Educational Technology Support |
| IETS➣Institute of Employment Studies (UK) |