To manage the variety of grid data used by TauDEM, a naming convention relying on suffixes appended to the body of file names has been developed to identify the contents of the files used. This convention is not required, but makes things a lot easier and is used to set up default file names. Each type of file is associated with a 1-4 character suffix that is appended to the main part of the file name, before the extension used by the computer system. If the Base Elevation grid name is "nnnn[.asc/.bgd]" then the remaining file names will be "nnnnsss[.asc/.bgd]" where sss is the suffix. The table below gives DEM grids used by TauDEM with these suffixes, and also indicates the functions in which the grids are used, as input or output. If the file is an ESRI grid, then there will be no extension (no part in []) because ESRI grids are folders. To access ESRI grids in a file open dialog in MapWindow TauDEM it is necessary to open the sta.adf file inside the ESRI grid folder. However do not be tempted to move these files or folders around using Windows Explorer, because all the files in the folder, as well as some in an info folder comprise the grid dataset. There are utilities for moving these files as part of ArcGIS.