Textual criticism is a branch of textual scholarship, philology, and literary criticism that is concerned with the identification of textual variants in either manuscripts or printed books. Ancient scribes made alterations when copying manuscripts by hand. Given a manuscript copy, several or many copies, but not the original document, the textual critic might seek to reconstruct the original text (the archetype or autograph) as closely as possible. The same processes can be used to attempt to reconstruct intermediate versions, or recensions, of a document's transcription history. The ultimate objective of the textual critic's work is the production of a "critical edition" containing a scholarly curated text.