| OTP | Bucharest Otopeni International Airport 
| Others |
| OTP | Objective Technical Problem
| Others |
| OTP | Occupational Training Programme
| Others |
| OTP | Occupy The Populace
| Others |
| OTP | OEM (Original Equipment Manufacturer) Technology Provider
| Others |
| OTP | Off The Path
| Others |
| OTP | Off Topic Post
| Others |
| OTP | Offener Tourenwagen Polizei
| Others |
| OTP | Offer To Purchase
| Others |
| OTP | Office of Technology Policy
| Others |
| OTP | Office of Telecommunications Policy
| Others |
| OTP | Office of The Prosecutor
| Others |
| OTP | Official Tea Party
| Others |
| OTP | Oh The Pain
| Others |
| OTP | Old Testament Pseudepigrapha
| Others |
| OTP | Oldtimer Praxis
| Others |
| OTP | Olympic Trial Participant
| Others |
| OTP | On The Phone
| Others |
| OTP | On The Planet
| Others |
| OTP | On The Porch
| Others |
| OTP | On The Potty
| Others |
| OTP | On The Premises
| Others |
| OTP | On The Prowl
| Others |
| OTP | On-Going Test Plan
| Others |
| OTP | On-Time Performance
| Others |
| OTP | Once Tamed Productions
| Others |
| OTP | One Term President
| Others |
| OTP | One Time Pad
| Others |
| OTP | One Time Passcode
| Others |
| OTP | One Time Passcodes
| Others |
| OTP | One Time Password
| Others |
| OTP | One Time Passwords
| Others |
| OTP | One Time Payment
| Others |
| OTP | One Time Pin
| Others |
| OTP | One Time Programmable
| Others |
| OTP | One Time Programming
| Others |
| OTP | One Tree Point
| Others |
| OTP | One True Pain
| Others |
| OTP | One True Pairing
| Others |
| OTP | One True Paring
| Others |
| OTP | One-Time Password
| Others |
| OTP | Oneness Trust Passion
| Others |
| OTP | Online Team Play
| Others |
| OTP | Online Theme Park
| Others |
| OTP | Online Transaction Process
| Others |
| OTP | Ontario Truck Plant
| Others |
| OTP | Open Tech Programme
| Others |
| OTP | Open Technology Platform
| Others |
| OTP | Open Telecom Platform
| Others |
| OTP | Open Telecommunications Platform
| Others |
| OTP | Open Telematic Platform
| Others |
| OTP | Open Trading Protocol
| Others |
| OTP | Open Training Platform
| Others |
| OTP | Operational Test Plan
| Others |
| OTP | Operational Test Procedure
| Others |
| OTP | Operations Test Plan
| Others |
| OTP | Operations Turnaround Plan
| Others |
| OTP | Opiate Treatment Program
| Others |
| OTP | Opioid Treatment Program
| Others |
| OTP | Opioid Treatment Programs
| Others |
| OTP | Opposite Track Path
| Others |
| OTP | Optimal Team Practice
| Others |
| OTP | Option To Purchase
| Others |
| OTP | Optional Term Policy
| Others |
| OTP | Oracle Tuning Pack
| Others |
| OTP | Order Transaction Processing
| Others |
| OTP | Oregon Transportation Plan
| Others |
| OTP | Orientation and Transition Programs
| Others |
| OTP | Orientation Transition Programs
| Others |
| OTP | Origin Template Plot
| Others |
| OTP | Other Tobacco Products
| Others |
| OTP | Otopeni, Romania
| Others |
| OTP | Ought To Pass
| Others |
| OTP | Out of Turn Priority
| Others |
| OTP | Out To Practice
| Others |
| OTP | Outline Test Plan
| Others |
| OTP | Outside The Perimeter
| Others |
| OTP | Outstanding Teacher Programme
| Others |
| OTP | Over Temperature Protection
| Others |
| OTP | Over the Page
| Others |
| OTP | Over The Pants
| Others |
| OTP | Over The Phone
| Others |
| OTP | Over The ToP
| Others |
| OTP | Over-Temperature Protection
| Others |
| OTP | Overview of The Process
| Others |
| OTP | Own The Podium
| Others |