<s>
The	O
SDS	B-Device
930	I-Device
was	O
a	O
commercial	O
24-bit	O
computer	O
using	O
bipolar	O
junction	O
transistors	O
sold	O
by	O
Scientific	O
Data	O
Systems	O
.	O
</s>
<s>
An	O
SDS	B-Device
930	I-Device
system	O
consists	O
of	O
at	O
least	O
three	O
standard	O
(	O
)	O
cabinets	O
,	O
weighing	O
about	O
.	O
</s>
<s>
It	O
is	O
composed	O
of	O
an	O
arithmetic	O
and	O
logic	O
unit	O
,	O
at	O
least	O
8,192	O
words	O
(	O
24-bit	O
+	O
simple	O
parity	B-Error_Name
bit	I-Error_Name
)	O
magnetic-core	B-General_Concept
memory	I-General_Concept
,	O
and	O
the	O
IO	O
unit	O
.	O
</s>
<s>
Two	B-General_Concept
's	I-General_Concept
complement	I-General_Concept
integer	O
arithmetic	O
is	O
used	O
.	O
</s>
<s>
An	O
optional	O
correlation	O
and	O
filtering	O
unit	O
(	O
CFE	O
)	O
can	O
be	O
added	O
,	O
which	O
is	O
capable	O
of	O
very	O
fast	O
floating-point	O
multiply-add	B-Algorithm
operations	O
(	O
primarily	O
intended	O
for	O
digital	O
signal	O
processing	O
applications	O
)	O
.	O
</s>
<s>
The	O
SDS	B-Device
930	I-Device
is	O
a	O
typical	O
small	O
-	O
to	O
medium-scale	O
scientific	O
computer	O
of	O
the	O
1960s	O
.	O
</s>
<s>
Speed	O
is	O
good	O
for	O
its	O
cost	O
,	O
but	O
with	O
an	O
integer	O
add	O
time	O
of	O
3.5	O
microseconds	O
,	O
it	O
is	O
not	O
in	O
the	O
same	O
league	O
as	O
the	O
scientific	O
workhorses	O
of	O
the	O
day	O
(	O
the	O
CDC	B-Device
6600	I-Device
,	O
for	O
example	O
)	O
.	O
</s>
<s>
Programming	O
languages	O
available	O
include	O
FORTRAN	O
II	O
,	O
ALGOL	O
60	O
,	O
and	O
the	O
assembly	B-Language
language	I-Language
known	O
as	O
Meta-Symbol	O
.	O
</s>
<s>
Towards	O
the	O
end	O
of	O
the	O
SDS	B-Device
930	I-Device
's	O
market	O
lifetime	O
a	O
real-time	B-Operating_System
monitor	I-Operating_System
system	O
was	O
introduced	O
,	O
which	O
included	O
a	O
FORTRAN	O
IV	O
compiler	O
.	O
</s>
<s>
Project	O
Genie	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
,	O
added	O
hardware	O
to	O
permit	O
time-sharing	O
with	O
the	O
Berkeley	B-General_Concept
Timesharing	I-General_Concept
System	I-General_Concept
.	O
</s>
<s>
These	O
changes	O
later	O
formed	O
the	O
basis	O
for	O
the	O
SDS	B-Device
940	I-Device
.	O
</s>
<s>
SDS	B-Device
930s	I-Device
could	O
be	O
found	O
at	O
most	O
of	O
the	O
major	O
US	O
government	O
labs	O
at	O
the	O
time	O
,	O
including	O
Los	O
Alamos	O
Scientific	O
Laboratory	O
.	O
</s>
<s>
Early	O
flight	B-Application
simulators	I-Application
used	O
the	O
SDS	B-Device
930	I-Device
,	O
because	O
of	O
its	O
hardware	O
integer	O
multiply	O
and	O
divide	O
capability	O
and	O
its	O
real-time	O
data	O
acquisition	O
and	O
control	O
peripheral	O
modules	O
.	O
</s>
<s>
The	O
Surface	O
Ship	O
ASW	O
Attack	O
Trainer	O
(	O
Device	O
14A2A	O
)	O
used	O
a	O
SDS	B-Device
930	I-Device
computer	O
and	O
was	O
designed	O
to	O
train	O
the	O
ASW	O
attack	O
team	O
of	O
a	O
US	O
Navy	O
destroyer	O
in	O
submarine	O
warfare	O
by	O
providing	O
realistic	O
simulations	O
ashore	O
with	O
cost	O
savings	O
in	O
operating	O
time	O
and	O
expense	O
at	O
sea	O
.	O
</s>
