| PTU | Parachute Test Unit 
| Others |
| PTU | Parallel Transfer Unit
| Others |
| PTU | Parent & Teen Universities, Incorporated
| Others |
| PTU | Parent Teacher Union
| Others |
| PTU | Parent Teacher Unit
| Others |
| PTU | Parents and Teachers United
| Others |
| PTU | Part Throttle Unlock
| Others |
| PTU | Participating Test Unit
| Others |
| PTU | Pay To Use
| Others |
| PTU | Pearson Teachers Union
| Others |
| PTU | Performer Terrain Utilities
| Others |
| PTU | Perimetre des Transports Urbains
| Others |
| PTU | Personal Time Unit
| Others |
| PTU | Personal Time Units
| Others |
| PTU | Philadelphia Tenants Union
| Others |
| PTU | Physical Training Uniform
| Others |
| PTU | Platinum, Alaska USA
| Others |
| PTU | Plumbing Trades Union
| Others |
| PTU | Pokemon Tabletop United
| Others |
| PTU | Police Tactic Unit
| Others |
| PTU | Police Tactical Unit
| Others |
| PTU | Portable Test Unit
| Others |
| PTU | Portable Training Unit
| Others |
| PTU | Power Take-Off Unit
| Others |
| PTU | Power Transfer Unit
| Others |
| PTU | Power Transistor Unit
| Others |
| PTU | Preliminary Treatment Unit
| Others |
| PTU | Print Tec University
| Others |
| PTU | Pro Tri Union
| Others |
| PTU | Procedure and Treatment Unit
| Others |
| PTU | Process Training Unit
| Others |
| PTU | Processor Timer Unit
| Others |
| PTU | Product Technology Unit
| Others |
| PTU | Programmable Timing Unit
| Others |
| PTU | PropylThioUracil (Antithyroid medication)
| Others |
| PTU | Providence Teachers Union
| Others |
| PTU | Public Test Universe
| Others |
| PTU | Punjab Technical University
| Others |
| PTU | Pupil Transportation Unit
| Others |