| อักษรย่อ | คำเต็ม | รายละเอียด |
| p | page | |
| P.A. | Per Annum | |
| p.m. | post meridiem | |
| p.p. | per pro (through the agency of) | |
| P.S | Post Script | |
| P.S. | Post Script | |
| P/N | Part Number | |
| P&T | Personnel & Training | |
| P&G | Procter & Gamble | |
| PA6 | Polyamide 6 | |
| PA66 | Polyamide 6,6 | |
| PAT | Port Authority of Thailand | |
| PC | Personal Computer | |
| PCB | Printed Circuit Board | |
| PCI | Peripheral Component Interconnect | |
| PCL | Public Company Limited | |
| PCM | Please call me | |
| PDA | Personal Digital Assistant | |
| PDF | Portable Document Format | |
| PE | Physical Examination | |
| PED | PEDIATRIC | |
| PH | Past history | |
| PHP | Hypertext Preprocessor | |
| PI | Present illness | |
| PIN | Personal Identification Number | |
| plc | public limited company | |
| PLS | Please | |
| Pls/Plz | Please | |
| PLZ | Please | |
| PM | Private Message | |
| PM me | send me a Private Message | |
| PMMA | Poly Methyl Methacrylate | |
| PNG | Portable Network Graphics | |
| POP3 | Post Office Protocol 3 | |
| PP | Polypropylene | |
| PPI | Pixels per inch | |
| PPM | Part per Million | |
| PPV | People Powered Vehicle | |
| PR | Pulse Rate | |
| ps | postscript | |
| PST | Pacific Standard Time | |
| PT | PHYSICAL THERAPY | |
| pt-tm | part time | |
| PTO | please turn over | |
| PTT | Petroleum Authority of Thailand | |
| PVC | Premature Ventriular Contracture | |
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