NET$SDA is a shareable image that SDA finds when you issue
 	the SHOW DECNET or NET command.  (SHOW DECNET is provided
 	for consistency with the PhaseIV behavior.)

 	You may type a single NET$SDA command following the verb NET
 	on an SDA command line.   Or you may chose to type just
 	the verb NET to be prompted for specifically NET$SDA commands.