| Acronym | Sense | Language | Topics |
|---|---|---|---|
| REU | Rusia Esperantista Unio (www.reu.ru) | In Esperanto | → Organizations and associations → Artificial languages (linguistics) → Russia |
| REU | Remote Electronics Unit | In English | → Electronics |
| REU | Research Experiences for Undergraduates | In English | → Research policy → Education |