Lexical - F$GETSYI
Use to get information about the system.
$ vbl = F$GETSYI( item[,nodename][,cluster_id] )
Can be used to retrieve the value of any system
parameter, as well as values associated with some
other keywords (see HELP or the DCL Dictionary).
Notes:
The F$GETSYI() lexical function can be used to retrieve many useful items of information about the running OpenVMS system.
Any system parameter value can be retrieved, as well as some information about the cluster and the hardware on which the system is running.