<s>
OS/7	B-Operating_System
is	O
a	O
discontinued	O
operating	B-General_Concept
system	I-General_Concept
from	O
Sperry	O
Univac	O
for	O
its	O
90/60	B-Device
and	I-Device
90/70	I-Device
computer	O
systems	O
.	O
</s>
<s>
The	O
system	O
was	O
first	O
announced	O
in	O
November	O
1971	O
for	O
Univac	O
's	O
9700	B-Device
system	I-Device
and	O
was	O
originally	O
scheduled	O
for	O
delivery	O
in	O
March	O
1973	O
.	O
</s>
<s>
OS/7	B-Operating_System
was	O
abruptly	O
discontinued	O
in	O
1975	O
in	O
favor	O
of	O
VS/9	O
,	O
Univac	O
's	O
name	O
for	O
RCA	O
's	O
VMOS	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
"	O
OS/7	B-Operating_System
is	O
a	O
multi-tasking	O
,	O
multi-programming	O
system	O
that	O
utilizes	O
a	O
roll-in	O
,	O
roll-out	O
capability	O
to	O
keep	O
the	O
CPU	O
optimally	O
busy.	O
"	O
</s>
