A document is a written, drawn, presented or memorialized representation of thought. The word comes from the Latin documentum, which denotes a "teaching" or "lesson": the verb doceō denotes "to teach". In the past the word was usually used to denote a useful written test as evidence of a truth or fact. In the computer age, "document" usually denotes a mainly textual computer file, including its structure and format, and. gram. Fonts, colours and images. At the same time, the "document" is not defined by its means of transmission, and. G., Paper, given the existence of electronic documents. "Documentation" is different because it has more denotations than "document". Documents are also distinguished from "realia", which are three-dimensional objects that would otherwise satisfy the definition of "document" because they remember or represent thought; Documents are considered more like two-dimensional representations.