<s>
Cambridge	B-Application
Algebra	I-Application
System	I-Application
(	O
CAMAL	B-Application
)	O
is	O
a	O
computer	B-General_Concept
algebra	I-General_Concept
system	I-General_Concept
written	O
in	O
Cambridge	O
University	O
by	O
David	O
Barton	O
,	O
Steve	O
Bourne	O
,	O
and	O
John	O
Fitch	O
.	O
</s>
<s>
The	O
foundation	O
code	O
was	O
written	O
in	O
Titan	B-Device
computer	I-Device
assembler	B-Language
,	O
.	O
</s>
<s>
In	O
1973	O
,	O
when	O
Titan	B-Device
was	O
replaced	O
with	O
an	O
IBM370/85	O
,	O
it	O
was	O
rewritten	O
in	O
ALGOL	B-General_Concept
68C	I-General_Concept
and	O
then	O
BCPL	B-Language
where	O
it	O
could	O
run	O
on	O
IBM	B-Device
mainframes	I-Device
and	O
assorted	O
microcomputers	B-Architecture
.	O
</s>
