<s>
The	O
categorical	B-Application
abstract	I-Application
machine	I-Application
(	O
CAM	O
)	O
is	O
a	O
model	O
of	O
computation	O
for	O
programs	O
that	O
preserves	O
the	O
abilities	O
of	O
applicative	O
,	O
functional	O
,	O
or	O
compositional	O
style	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
the	O
techniques	O
of	O
applicative	B-Application
computing	I-Application
.	O
</s>
<s>
The	O
notion	O
of	O
the	O
categorical	B-Application
abstract	I-Application
machine	I-Application
arose	O
in	O
the	O
mid-1980s	O
.	O
</s>
<s>
It	O
took	O
its	O
place	O
in	O
computer	O
science	O
as	O
a	O
kind	O
of	O
theory	O
of	O
computation	O
for	O
programmers	O
,	O
represented	O
by	O
Cartesian	B-Application
closed	I-Application
category	I-Application
and	O
embedded	O
into	O
the	O
combinatory	B-Application
logic	I-Application
.	O
</s>
<s>
The	O
main	O
current	O
implementation	O
is	O
OCaml	O
,	O
which	O
added	O
class	O
inheritance	O
and	O
dynamic	O
method	O
dispatch	O
to	O
Caml	B-Language
the	O
Categorical	B-Language
Abstract	I-Language
Machine	I-Language
Language	I-Language
.	O
</s>
<s>
Both	O
are	O
variants	O
of	O
MetaLanguage	O
ML	B-Language
,	O
and	O
all	O
three	O
languages	O
implement	O
type	O
inference	O
.	O
</s>
<s>
One	O
of	O
the	O
implementation	O
approaches	O
to	O
functional	O
languages	O
is	O
given	O
by	O
the	O
machinery	O
based	O
on	O
supercombinators	B-Application
,	O
or	O
an	O
SK-machine	O
,	O
by	O
D	O
.	O
Turner	O
.	O
</s>
<s>
The	O
evaluations	O
are	O
similar	O
to	O
those	O
of	O
P	O
.	O
Landin	O
’s	O
SECD	B-Application
machine	I-Application
.	O
</s>
