sashelp displays the SAS documentation through any browser. By default Netscape is used, but this can be changed by setting the environment variable SAS_BROWSER to be the name of an executable that can be invoked sas SAS_BROWSER url.
The usage of sashelp is best explained with a few examples:
Without any parameters sashelp invokes the browser on the entry page of the SAS documentation ($SAS_DIR/README.html).
Through the doc parameter, sashelp tries to display the documentation for the task in question. (evselect in this case.)
As before, but now the documentation of the SAS package taskmain is displayed.