<s>
CPL	B-Language
(	O
Combined	B-Language
Programming	I-Language
Language	I-Language
)	O
is	O
a	O
multi-paradigm	O
programming	O
language	O
,	O
that	O
was	O
developed	O
in	O
the	O
early	O
1960s	O
.	O
</s>
<s>
It	O
is	O
an	O
early	O
ancestor	O
of	O
the	O
C	B-Language
language	I-Language
via	O
the	O
BCPL	B-Language
and	O
B	B-Language
languages	I-Language
.	O
</s>
<s>
CPL	B-Language
was	O
developed	O
initially	O
at	O
the	O
Mathematical	O
Laboratory	O
at	O
the	O
University	O
of	O
Cambridge	O
as	O
the	O
"	O
Cambridge	O
Programming	O
Language	O
"	O
and	O
later	O
published	O
jointly	O
between	O
Cambridge	O
and	O
the	O
University	O
of	O
London	O
Computer	O
Unit	O
as	O
the	O
"	O
Combined	B-Language
Programming	I-Language
Language	I-Language
"	O
.	O
</s>
<s>
(	O
CPL	B-Language
was	O
also	O
nicknamed	O
by	O
some	O
as	O
"	O
Cambridge	O
Plus	O
London	O
"	O
or	O
"	O
Christopher	O
's	O
Programming	O
Language	O
"	O
)	O
.	O
</s>
<s>
The	O
first	O
paper	O
describing	O
it	O
was	O
published	O
in	O
1963	O
,	O
while	O
it	O
was	O
being	O
implemented	O
on	O
the	O
Titan	B-Device
Computer	I-Device
at	O
Cambridge	O
and	O
the	O
Atlas	B-Device
Computer	I-Device
at	O
London	O
.	O
</s>
<s>
It	O
was	O
heavily	O
influenced	O
by	O
ALGOL	B-Language
60	I-Language
,	O
but	O
instead	O
of	O
being	O
extremely	O
small	O
,	O
elegant	O
and	O
simple	O
,	O
CPL	B-Language
was	O
intended	O
for	O
a	O
wider	O
application	O
area	O
than	O
scientific	O
calculations	O
and	O
was	O
therefore	O
much	O
more	O
complex	O
and	O
not	O
as	O
elegant	O
as	O
ALGOL	B-Language
60	I-Language
.	O
</s>
<s>
CPL	B-Language
was	O
a	O
big	O
language	O
for	O
its	O
time	O
.	O
</s>
<s>
CPL	B-Language
attempted	O
to	O
go	O
beyond	O
ALGOL	O
to	O
include	O
industrial	O
process	O
control	O
,	O
business	O
data	O
processing	O
and	O
possibly	O
some	O
early	O
command	O
line	O
games	O
.	O
</s>
<s>
CPL	B-Language
was	O
intended	O
to	O
allow	O
low-level	O
programming	O
and	O
high	O
level	O
abstractions	O
using	O
the	O
same	O
language	O
.	O
</s>
<s>
However	O
,	O
CPL	B-Language
was	O
only	O
implemented	O
very	O
slowly	O
.	O
</s>
<s>
The	O
first	O
CPL	B-Language
compiler	B-Language
was	O
probably	O
written	O
about	O
1970	O
,	O
but	O
the	O
language	O
never	O
gained	O
much	O
popularity	O
and	O
seems	O
to	O
have	O
disappeared	O
without	O
trace	O
sometime	O
in	O
the	O
1970s	O
.	O
</s>
<s>
BCPL	B-Language
(	O
for	O
"	O
Basic	O
CPL	B-Language
"	O
,	O
although	O
originally	O
"	O
Bootstrap	O
CPL	B-Language
"	O
)	O
was	O
a	O
much	O
simpler	O
language	O
based	O
on	O
CPL	B-Language
intended	O
primarily	O
as	O
a	O
systems	B-Application
programming	I-Application
language	O
,	O
particularly	O
for	O
writing	O
compilers	B-Language
;	O
it	O
was	O
first	O
implemented	O
in	O
1967	O
,	O
prior	O
to	O
CPL	B-Language
's	O
first	O
implementation	O
.	O
</s>
<s>
BCPL	B-Language
then	O
led	O
,	O
via	O
B	B-Language
,	O
to	O
the	O
popular	O
and	O
influential	O
C	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
It	O
is	O
thought	O
that	O
CPL	B-Language
was	O
never	O
fully	O
implemented	O
in	O
the	O
1960s	O
,	O
existing	O
as	O
a	O
theoretical	O
construct	O
with	O
some	O
research	O
work	O
on	O
partial	O
implementations	O
.	O
</s>
<s>
Peter	O
Norvig	O
has	O
written	O
(	O
for	O
Yapps	O
,	O
a	O
Python	B-Language
compiler-compiler	B-Language
)	O
a	O
simple	O
CPL	B-Language
to	O
Python	B-Language
translator	O
for	O
modern	O
machines	O
.	O
</s>
