| Acronym | Definition |
|---|
| OTI | On The Internet |
| OTI | Office of Transition Initiatives (US DoD) |
| OTI | OSHA Training Institute |
| OTI | Open Tool Interface |
| OTI | Oak Technology Inc. |
| OTI | Ours Technology, Inc. (Taiwan) |
| OTI | Onconova Therapeutics, Inc. (biopharmaceutical company) |
| OTI | Occupational Training Institute (Foothill-DeAnza Community College, California) |
| OTI | Online Therapy Institute |
| OTI | Operational Training Infrastructure (US Air Force) |
| OTI | Organización de La Televisión Iberoamericana (Spanish: Organization of Iberoamerican Television) |
| OTI | Organizational Trust Inventory |
| OTI | One-Time Issuance (public assistance) |
| OTI | Ormat Technologies Inc |
| OTI | Ordnance Technical Instructions (US Navy) |
| OTI | One Time Inspection |
| OTI | Oh the Irony |
| OTI | Out of Town Inquiry (child welfare) |
| OTI | Open Telecom Infrastructure |
| OTI | Office of Technical Integration |
| OTI | Oil Treatment International (bioremediation of oil spills) |
| OTI | Operational Time Interval |
| OTI | Office Tenant Improvement |
| OTI | Oil Treatment International AG |
| OTI | On Time Item (delivery) |
| OTI | Optimum Teleservices, Inc. |
| OTI | On Target Income |