| Paradigms - | (Software Engineering) the process model |
| Patterns - | (Software Engineering) a stylized description or characterization of a software problem or capability and/or the manner in which a solution to the problem or capability may be characterized, applied, and implemented |
| PDL - | (Software Engineering) program design language; a combination of natural language with programming language-like constructs |
| Perfective maintenance - | (Software Engineering) enhancement, |
| Portability - | (Software Engineering) the ability to transport software from one target environment to another |
| Preliminary design - | (Software Engineering) creates representation of the data and architecture |
| Procedural design - | (Software Engineering) creates representations of algorithmic detail within a module |
| Process framework - | (Software Engineering) a relatively small set of fundamental software engineering activities that define a software process |
| Processing narrative - | (Software Engineering) a natural language description of a model (program component) |
| Productivity - | (Software Engineering) work output per unit time |