1) a flat case used e.g. by a business executive for papers etc (briefcase)

2) a small metal etc device used for keeping papers etc together (clip)

3) the letters or papers showing that a person is what he or she claims to be (credentials)

4) a set of papers giving information about a person or event, especially a personal record (dossier)

5) a metal tool with a rough surface, used for cutting or smoothing hard substances; any kind of folder, case etc used for keeping papers etc together (file)

6) a small device used for fastening papers together with staples (stapler)