| Abbreviation | Definition |
|---|---|
| P | Probability |
| P | Product |
| P(E) | The Perimeter of E |
| P(J) | The Price of J |
| p.c. | per cent |
| PA | Packet Assemble |
| PA | Peano Arithmetic |
| PA | Polar Angle |
| PA | Process Algebra |
| PAB | Process Anchor Block |
| PACM | Professional Applied and Computational Mathematics |
| PACM | Program in Applied and Computational Mathematics |
| PAD | Packet Assemble-Disassemble |
| PAF(s) | population attributable fraction(s) |
| PAG | Process Access Group |
| PAM | Programmable Advanced Mathematics |
| PAMM | Proceedings in Applied Mathematics and Mechanics |
| PAP | Parallelizable Algorithmic Patterns |
| PARS | Polygon Attribute Reaggregation System |
| PASTA | Poisson Arrivals See Time Average |