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.
Internal documentation is the one in which various information regarding the program is enlisted in the program itself i.e. in the form of comments. On the contrary, external â¦ documentation is the one that is prepared separately to inform the users about the system.