HDO
The abbreviation HDO stands for:
- Hydrodeuterium oxide ( semi -heavy water), see heavy water
- High Definition Oberhausen , see Technology Center Oberhausen
- House of the German East in Munich
- House of the German East in Düsseldorf, today Gerhart-Hauptmann-Haus (Düsseldorf)
- Hrvatski demokratski odbor , terrorist group of Croatian exiles
The abbreviation BTE stands for:
- Handbook of Oriental Studies
- Behind-the-ear device , see hearing aid # Behind-the-ear devices
- Officers 'house , officers' mess
