A facsimile (From Latin fac simile, "make like") is a copy or reprouction of an old book, manuscript, map, art print or other item of historical value that is as true-to-the-original source as possible using, normally, some form of photographic technique. They differ from other forms of reproduction by attempting to replicate the source as accurately as possible in terms of scale, colour, condition, and other material qualities. For books and manuscripts, this also entails a complete copy of all pages; hence an incomplete copy is known as a "partial facsimile". Facsimiles are used, for example, by scholars to research a source that they do not have access to otherwise and by museums and archives for museum and media preservation. Many are sold commercially.