In the following it is assumed that there exists a disk structure where the distributed scripts and programs are located in the directories /WFC_DIST_DIR/etc and /WFC_DIST_DIR/bin respectively. Before any use can be made of them these directories should be added the search path of the user. For example: > set path = ( /WFC_DIST_DIR/bin /WFC_DIST_DIR/etc $path ) It is advisable to place all the commands for preparing the correct shell environment into a text file that can be 'sourced' by the shell interpreter either each time before processing or as part of the standard shell startup file (e.g. .cshrc). For example: > source winit setenv WFC_TOP /wfc/distribution setenv WFC_ETC /wfc/distribution/etc setenv WFC_BIN /wfc/distribution/bin setemv WFC_CAL /wfc/distribution/cal setenv WFC_CAT /wfc/distribution/lib/catalogs