in the united states and canada, an editor who does this work is called a "copy editor". an organization's highest-ranking copy editor, or the supervising editor of a group of copy editors, may be known as the "copy chief", "copy desk chief", or "news editor". in book publishing in the united kingdom and other parts of the world that follow british nomenclature, the term "copy editor" is used, but in newspaper and magazine publishing, the term is subeditor (or sub-editor), commonly shortened to "sub". the senior subeditor of a publication is frequently called the "chief subeditor". as the prefix "sub" suggests, copy editors typically have less authority than regular editors.