| Object-oriented - | (Software Engineering) an approach to software development that makes use of a classification approach and packages data and processing together |
| OCL (Object Constraint Language) - | (Software Engineering) a supplement to UML, this formal language allows a software engineer to construct unambiguous statements about the characteristics of various design model elements |
| Pair programming - | (Software Engineering) two people work together (side-by-side) to design and construct a software component, providing real-time problem solving and quality control. |
| Perfective maintenance - | (Software Engineering) enhancement, |
| Portability - | (Software Engineering) the ability to transport software from one target environment to another |
| 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 |
| Project planning - | (Software Engineering) the activity that creates the Project Plan |
| Project size - | (Software Engineering) an indication of the overall effort to be expended or the number of people working on the project |