Workbooks contain one or several Worksheets or Dashboards and are the container for all Visual Analytics work; they function much like spreadsheets or Excel workbooks with tabs for their contents. With Workbooks you can save,edit and organize your charts and tables. Visual Analytics Workbook files will have a .vizw extension [Workbook] or .vizx extension [Packaged Workbook]. These files can then be shared with others. The title bar in a Workbook will indicate which kind of file you have open by showing you the full filename with the extension.