What is "otu"

Otu or OTU may refer to:

• Otu, Iran, a village in Mazandaran Province, Iran
• Otu, Siga, Japan
• Otú Airport, an airport in the village of Otú and serving the town of Remedios, Colombia
• Operational taxonomic unit, in biology
• Operational Training Unit (Royal Air Force)
• Optical channel Transport Unit, a layer of the Optical Transport Network