| Abbreviation | Definition |
|---|---|
| PSP | Perfect Security Property |
| PSS | Probabilistic Signature Scheme |
| PST | Pipeline Security Technology |
| PTC | Polymorphic Tracking Code |
| PTD | Personal Trusted Device |
| PTF | Partition Trace File |
| PTO | Power This Outlet |
| PUK | PIN (Personal Identification Number) Unlocking Key |
| PUM | Potentially Unwanted Modification |
| PUP | Potentially Unwanted Program |
| PVG | Protection of Vulnerable Groups |
| PVV | PIN (Personal Identification Number) Verification Value |
| PWD | Password |
| PWF | PGP (Pretty-Good Privacy) WinFront |
| PWK | PassWord Key |
| PWP | PassWord Protected |
| PWR | PassWord Recovery |
| QAL | Query Answered Log |
| QAV | Qubux Anti-Virus |
| QBP | QuickBooks Password |