| P&SM | Procurement and Subcontract Management 
| Others |
| P&SM | Production and Systems Management
| Others |
| P&SMOC | Portsmouth and Southampton Mini Owners Club
| Others |
| P&T | Permanent and Total
| Others |
| P&T | Professional & Technology
| Others |
| P&T | Professional and Technical
| Others |
| P&T OP | Pipeline and Terminal Operating
| Others |
| P&U | Patch and Update
| Others |
| P&W | Pratt and Whitney
| Others |
| P's and Q's | Pints and Quarts
| Others |
| P(E) | The Perimeter of E
| Others |
| P(J) | The Price of J
| Others |
| P* | Pending Inactive
| Others |
| P* | Prodigy
| Others |
| P* | Undisturbed reservoir Pressure
| Others |
| P,C,&H | Packing, Crating, and Handling
| Others |
| P-A | Posterior Anterior
| Others |
| P-A | Posterior-Anterior
| Others |
| P-BAND | 225 to 390 MegaHertz
| Others |
| P-BEST | Pooling-Based Efficient SARS-CoV-2 Testing
| Others |
| P-Book | Printed Book
| Others |
| P-D | person-day(s)
| Others |
| P-F | Pass-Fail
| Others |
| P-G | Post-Graduate
| Others |
| P-GILD | Projection Gas Immersion Laser Doping
| Others |
| P-H | person-hour(s)
| Others |
| P-M | IEEE Potentials Magazine
| Others |
| P-MEC | Parala Maharaja Engineering College
| Others |
| P-MR | Producibility-Medium Risk
| Others |
| P-POD | Poly-PicoSatellite Orbital Deployer
| Others |
| p-static | Precipitation static
| Others |
| P-T | Parent-Teacher
| Others |
| P-TPM | Producibility - Technical Performance Measure
| Others |
| P-TUBE | Pneumatic TUBE
| Others |
| P-WEAR | Preliminary Work Breakdown Structure Element Audit Review
| Others |
| P-WORD | Password
| Others |
| P. | Pupil
| Others |
| P. A. | Pharmacy Assistant
| Others |
| P. ENG. | Professional Engineer
| Others |
| P. L. ENG | Professional Licensee Engineering
| Others |
| P. Tech | Professional Technologist
| Others |
| P.1 | Primary 1
| Others |
| P.2 | Primary 2
| Others |
| P.3 | Primary 3
| Others |
| P.4 | Primary 4
| Others |
| P.5 | Primary 5
| Others |
| P.6 | Primary 6
| Others |
| P.A. | Prince Albert
| Others |
| P.A.A. | Phillips Academy, Andover
| Others |
| P.ADM. | Professional Administrator
| Others |