<s>
The	O
Cambridge	B-Operating_System
Distributed	I-Operating_System
Computing	I-Operating_System
System	I-Operating_System
is	O
an	O
early	O
discontinued	O
distributed	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
,	O
developed	O
in	O
the	O
1980s	O
at	O
Cambridge	O
University	O
.	O
</s>
<s>
It	O
grew	O
out	O
of	O
the	O
Cambridge	B-General_Concept
Ring	I-General_Concept
local	B-General_Concept
area	I-General_Concept
network	I-General_Concept
,	O
which	O
it	O
used	O
to	O
interconnect	O
computers	O
.	O
</s>
<s>
The	O
Cambridge	O
system	O
connected	O
terminals	B-General_Concept
to	O
"	O
processor	O
banks	O
"	O
.	O
</s>
<s>
The	O
system	O
then	O
assigned	O
to	O
the	O
user	O
a	O
machine	O
that	O
served	O
,	O
for	O
the	O
duration	O
of	O
the	O
login	O
session	O
,	O
as	O
their	O
"	O
personal	B-Device
"	O
computer	O
.	O
</s>
<s>
The	O
machines	O
in	O
the	O
processor	O
bank	O
ran	O
the	O
TRIPOS	B-Operating_System
operating	O
system	O
.	O
</s>
<s>
Additional	O
special-purpose	O
servers	O
provided	O
file	B-Application
and	O
other	O
services	O
.	O
</s>
