| Acronym | Sense | Language | Topics |
|---|---|---|---|
| ETO | Earth To Orbit | In English | → Astronautics |
| ETO | Ethylene Oxide | In English | → Chemical technology → Chemistry |
| ETO | European Telecommunications Office (www.eto.dk) | In English | → Telecommunications → Europe |
| ETO | Eerlijk Ter Overwinning | In Dutch | → Organizations and associations → Sport, physical exercises |