Prints information about data structures concerned with the
     operation of LES

 	SHOW ... options ... [ /FULL ] [ /ALL ]

     *NOTE*

     If a logical LES$SYM is defined (as a directory spec), then
     SDA will attempt to read the following symbol table files in
     from LES$SYM: on the first execution any show les command :

 	LES$LES_V30.EXE (relative to the start of the LES image)
 	LES_SYMBOLS.STB
 	LES$ACP_CODE.STB