<s>
Unix/NS	B-Operating_System
(	O
the	O
NCR	O
3700	O
Operating	O
System	O
)	O
is	O
based	O
on	O
the	O
Unix	B-Application
SVR4	O
.	O
</s>
<s>
When	O
compared	O
to	O
other	O
parallel	O
UNIX	B-Application
operating	I-Application
systems	I-Application
like	O
Mach	B-Operating_System
or	O
Chorus	B-Operating_System
,	O
Unix/NS	B-Operating_System
has	O
a	O
more	O
powerful	O
communication	O
and	O
message	O
addressing	O
paradigm	O
,	O
and	O
richer	O
process-group	O
management	O
and	O
global	O
synchronization	O
mechanism	O
.	O
</s>
