| PTR | Cursor image file (OS/2 PTR file) 
| Others |
| PTR | Paid To Read
| Others |
| PTR | Palms To Rear
| Others |
| PTR | Panna Tiger Reserve
| Others |
| PTR | Parabolic Trough Receiver
| Others |
| PTR | Parappa The Rapper
| Others |
| PTR | Part Throttle Reheat
| Others |
| PTR | Partnerships for Trauma Recovery
| Others |
| PTR | Parts Tracking Report
| Others |
| PTR | Passenger Transportation Regulation
| Others |
| PTR | Patellar Tendon Reflex
| Others |
| PTR | Pay To Read
| Others |
| PTR | Penske Truck Rental
| Others |
| PTR | Peptidyl Transferase Ring
| Others |
| PTR | Perfect Tax Relief
| Others |
| PTR | Permanent Traffic Recorder
| Others |
| PTR | Personnel Transaction Report
| Others |
| PTR | Peter Thomas Roth
| Others |
| PTR | Petition To Revoke
| Others |
| PTR | Pharmacotherapy and Translational Research
| Others |
| PTR | Pick-Up Truck Racing
| Others |
| PTR | Pilot Touring
| Others |
| PTR | Platelet Transfusion Reaction
| Others |
| PTR | Poids Total Roulant
| Others |
| PTR | Port Terminal Railroad of South Carolina
| Others |
| PTR | Portable Traffic Recorder
| Others |
| PTR | Portable Transmit Receive
| Others |
| PTR | Portfolio Turnover Rate
| Others |
| PTR | Positive Time Report
| Others |
| PTR | Post Tenure Review
| Others |
| PTR | Pre-Trial Release
| Others |
| PTR | Precision Target Rifle
| Others |
| PTR | Preliminary Technical Review
| Others |
| PTR | Preliminary Test Report
| Others |
| PTR | Preliminary Title Report
| Others |
| PTR | Pressure Test Record
| Others |
| PTR | Pressure Transmission Ratio
| Others |
| PTR | Price To Retailer
| Others |
| PTR | Print and Transaction Router
| Others |
| PTR | Problem Trouble Report
| Others |
| PTR | Processing Trade Regimes
| Others |
| PTR | Professional Tax Receipt
| Others |
| PTR | Professional Tennis Registry
| Others |
| PTR | Program Trouble Report
| Others |
| PTR | Progress Through the Ranks
| Others |
| PTR | Property Tax Reimbursement
| Others |
| PTR | Proton Transfer Reaction
| Others |
| PTR | Protoss Terran Republic
| Others |
| PTR | Psychic Transmission Rifle
| Others |
| PTR | Public Test Realm
| Others |
| PTR | Public Test Region
| Others |
| PTR | Public Test Release
| Others |
| PTR | Public Transport Regulation
| Others |
| PTR | Pull To Refresh
| Others |
| PTR | Pupil Teacher Ratio
| Others |
| PTR | Python Test Runner
| Others |
| PTR | QMail Qwk reader pointer file
| Others |