| PUC | Pollution Under Control |
| PAN | Permanent Account Number |
| PO | Post Office |
| PO | Probationary Officer |
| PCO | Public Call Office |
| PCS | Personal Communication Service |
| PCS | Provincial Civil Service |
| PhD | Doctor of Philosophy |
| PGDCA | Post Graduate Diploma in Computer Application |
| PGDM | Post Graduate Diploma in Management |
| PFA | Please Find Attachment |
| PS | Postscript |
| PVC | Poly Vinyl Chloride |
| PING | Packet InterNet Groper |
| PNG | Portable Network Graphics |
| PSI | Population Services International |
| PSI | Pound per Square Inch |
| PDA | Personal Digital Assistant |
| PSU | Public Sector Undertaking |
| PSU | Power Supply Unit |
| PID | Pelvic Inflammatory Disease |
| PKD | Polycystic Kidney Disease |
| PMS | Premenstrual Syndrome |
| PTSD | Post-Traumatic Stress Disorder |
| PNR | Passenger Name Record |
| PVR | Priya Village Roadshow |
| POV | Point Of View |
| PDF | Portable Document Format |
| PHP | Hypertext Preprocessor |
| PPP | Public-Private Partnership |
| POS | Point Of Sale |
| PSLV | Polar Satellite Launch Vehicle |
| PMF | Presidential Management Fellows Program |
| PFMS | Public Financial Management System |
| PCT | Patent Cooperation Treaty |
| PLS | Please |
| PSTET | Punjab State Teacher Eligibility Test |
| Plt | Platelets |
| PT | Physical Therapy |
| PUD | Peptic Ulcer Disease |
| PTH | Parathyroid Hormone |
| PDT Time Zone | Pacific Daylight Time / Pacific Daylight Saving Time (Daylight Saving Time) |
| PETST Time Zone | Kamchatka Summer Time (Daylight Saving Time) |
| PETT Time Zone | Kamchatka Time (PETT) |
| PHOT Time Zone | Phoenix Island Time (Standard Time) |
| PHT Time Zone | Philippine Time (Standard Time) |
| PKT Time Zone | Pakistan Standard Time (Standard Time) |
| PMDT Time Zone | Pierre & Miquelon Daylight Time (Daylight Saving Time) |
| PMST Time Zone | Pierre & Miquelon Standard Time (Standard Time) |
| PONT Time Zone | Pohnpei Standard Time (Standard Time) |
| PST Time Zone | Pacific Standard Time / Pacific Time (Standard Time) |
| PT Time Zone | Pacific Time |
| PWT Time Zone | Palau Time (Standard Time) |
| PYST Time Zone | Paraguay Summer Time (Daylight Saving Time) |
| PYT Time Zone | Paraguay Time (Standard Time) |
