<s>
FROSTBURG	B-Device
was	O
a	O
Connection	B-Device
Machine	I-Device
5	O
(	O
CM-5	B-Device
)	O
massively	B-Operating_System
parallel	I-Operating_System
supercomputer	B-Architecture
used	O
by	O
the	O
US	O
National	O
Security	O
Agency	O
(	O
NSA	O
)	O
to	O
perform	O
higher-level	O
mathematical	O
calculations	O
.	O
</s>
<s>
The	O
CM-5	B-Device
was	O
built	O
by	O
the	O
Thinking	O
Machines	O
Corporation	O
,	O
based	O
in	O
Cambridge	O
,	O
Massachusetts	O
,	O
at	O
a	O
cost	O
of	O
US$25	O
million	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
massively	B-Operating_System
parallel	I-Operating_System
processing	I-Operating_System
computer	O
bought	O
by	O
NSA	O
,	O
originally	O
containing	O
256	O
processing	O
nodes	O
.	O
</s>
<s>
The	O
system	O
had	O
a	O
total	O
of	O
500	O
billion	O
32-bit	O
words	O
( ≈	O
2	O
terabytes	O
)	O
of	O
storage	B-General_Concept
,	O
2.5	O
billion	O
words	O
( ≈	O
10	O
gigabytes	O
)	O
of	O
memory	B-General_Concept
,	O
and	O
could	O
perform	O
at	O
a	O
theoretical	O
maximum	O
65.5	O
gigaFLOPS	O
.	O
</s>
<s>
The	O
operating	O
system	O
CMost	B-Device
was	O
based	O
on	O
Unix	B-Application
,	O
but	O
optimized	O
for	O
parallel	B-Operating_System
processing	I-Operating_System
.	O
</s>
<s>
FROSTBURG	B-Device
is	O
now	O
on	O
display	O
at	O
the	O
National	O
Cryptologic	O
Museum	O
.	O
</s>
