Bookmarks: It contains only single worksheet and its easy way to share your work.
Workbooks: Workbook can hold one or more dashboards and worksheets.
Packaged workbooks: It contains the workbook along with any supporting local file data and background images.
Data extraction files: Data extraction files are a local copy of a data source or a subset.
Data connection files: Data connection file is a small XML file that contain various connection information.