RT11 sysgen and disk partitions

[Gordon JC Pearce]

Vintage Computer Festival wrote:
> On Mon, 7 Mar 2005, Adrian Graham wrote:
> 
> 
>>Isn't that something to do with using DUX.SYS instead of DU.SYS or am I
>>getting confused with RT11XM and something like RT11SJ? It's been 16 or 17
>>years since I last sysgenned an RT11 box :-\
> 
> 
> What's the difference between RT11XM and RT11SJ?  What do the last two
> letter signify?
> 
eXtended Memory, and Single Job.  There's also Foreground/Background, 
and another one I can't remember.

Gordon.