<s>
DC/OSx	B-Operating_System
(	O
DataCenter/OSx	O
)	O
is	O
a	O
discontinued	O
Unix	B-Application
operating	I-Application
system	I-Application
for	O
MIPS	B-Device
based	O
systems	O
developed	O
by	O
Pyramid	O
Technology	O
.	O
</s>
<s>
It	O
ran	O
on	O
its	O
Nile	O
series	O
of	O
SMP	B-Operating_System
machines	O
and	O
was	O
a	O
port	O
of	O
AT&T	O
System	B-Operating_System
V	I-Operating_System
Release	I-Operating_System
4	I-Operating_System
(	O
SVR4	O
)	O
.	O
</s>
<s>
In	O
1995	O
,	O
Pyramid	O
Technology	O
was	O
acquired	O
by	O
Siemens	O
Nixdorf	O
Informationssysteme	O
(	O
SNI	O
)	O
,	O
and	O
DC/OSx	B-Operating_System
was	O
superseded	O
by	O
the	O
SINIX	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
DC/OSx	B-Operating_System
was	O
the	O
first	O
symmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
SMP	B-Operating_System
)	O
implementation	O
on	O
Unix	B-Operating_System
System	I-Operating_System
V	I-Operating_System
Release	O
4	O
.	O
</s>
<s>
DC/OSx	B-Operating_System
was	O
later	O
superseded	O
by	O
SINIX	B-Operating_System
,	O
a	O
version	O
of	O
the	O
Unix	B-Application
operating	I-Application
system	I-Application
from	O
SNI	O
.	O
</s>
<s>
Features	O
of	O
DC/OSx	B-Operating_System
were	O
incorporated	O
into	O
SINIX	B-Operating_System
;	O
later	O
versions	O
were	O
branded	O
as	O
Reliant	B-Operating_System
Unix	I-Operating_System
.	O
</s>
