Common Terms. Ecosystem An ecosystem is any geographic area that includes all of the organisms and nonliving parts of their physical environment. An ecosystem can be a natural wilderness area, a suburban lake or forest, or a heavily used area such as a city.
Definition of documentation for English Language Learners. : 1  the documents, records, etc., that are used to prove something or make something official. : 2  written instructions for using a computer or computer program.
Software documentation. Software documentation is written text or illustration that accompanies computer software. It either explains how it operates or how to use it, and may mean different things to people in different roles. Documentation is an important part of software engineering.