Library /sys$common/syshlp/sda.hlb Execute Command  *Conan The Librarian (sorry for the slow response - running on an old VAX)

         @file-spec

     Causes SDA to execute SDA commands contained in a file.  Use this
     command to execute a set of frequently used SDA commands.  This
     command is bound to the at sign (@) character.  The name of the
     file is a required argument.