| Reversible reaction | (Environmental Engineering) A reaction in which the reactant(s) proceed to product(s), but the products react at an appreciable rate to reform reactant(s). |
| System | (Environmental Engineering) An arbitrarily defined area or volume surrounded by a boundary and possessing specific inputs, outputs, and reactions. |
| Abstraction - | (Software Engineering) (1) the level of technical detail of some representation of software; (2) a cohesive model of data or an algorithmic procedureAction (also called Software engineering action) - |
| Aesthetic design - | (Software Engineering) a Web engineering action that focuses on the aesthetics (e.g., the artistic elements) of a WebApp (often encompasses graphic design) |
| Change management - | (Software Engineering) a set of software engineering actions that helps ensure that changes are properly identified, controlled, and reportedChange report - |
| Formulation - | (Software Engineering) a Web engineering action that identifies business need, describes WebApp objectives, defines major features and functions, and establishes mechanisms for requirements gathering |
| Interface design - | (Software Engineering) a software engineering action that establishes the structure and workflow for a user interface; follows three "golden rules:" place the user in control, reduce the user's memory leoad, make the interface consistent. |
| Levels of abstraction - | (Software Engineering) the degree of detail with which some representation of the software is presented |
| Navigation analysis - | (Software Engineering) a Web engineering action that establishes how a user will navigate between various elements (e.g., content, functions) of a WebApp |
| Paper prototype - | (Software Engineering) a paper representation of an application (e.g., story boards that describe the interaction at a human interface) |