In film credits for stories, screenplays, etc., "&" indicates a closer collaboration than "and". The ampersand is used by the Writers Guild of America to denote two writers collaborating on a specific script, rather than one writer rewriting another's work. In screenplays, two authors joined with "&" collaborated on the script, while two authors joined with "and" worked on the script at different times and may not have consulted each other at all. In the latter case, they both contributed enough significant material to the screenplay to receive credit but did not work together.