OTR
OTR is the abbreviation for:
- Off-the-Record Messaging , a message encryption for instant messaging
- OnlineTVRecorder
- Operative-tactical missile, term for tactical ballistic surface-to-surface missiles
- Overberg Test Range , a South African aerospace test site
- Oxygen transmission rate or oxygen transfer rate , term used in fermentation technology, see volume-related mass transfer coefficient
- Общественное Tелевидение России (German: Public Television of Russia ), a Russian television station launched in 2013
Otr stands for:
- a person in Germanic mythology, see Otter (mythology)
