<s>
Applicative	B-Application
computing	I-Application
systems	I-Application
,	O
or	O
ACS	O
are	O
the	O
systems	O
of	O
object	O
calculi	O
founded	O
on	O
combinatory	B-Application
logic	I-Application
and	O
lambda	B-Language
calculus	I-Language
.	O
</s>
<s>
In	O
combinatory	B-Application
logic	I-Application
the	O
only	O
metaoperator	O
is	O
application	B-Algorithm
in	O
a	O
sense	O
of	O
applying	O
one	O
object	O
to	O
other	O
.	O
</s>
<s>
In	O
lambda	B-Language
calculus	I-Language
two	O
metaoperators	O
are	O
used	O
:	O
application	B-Algorithm
–	O
the	O
same	O
as	O
in	O
combinatory	B-Application
logic	I-Application
,	O
and	O
functional	B-Language
abstraction	I-Language
which	O
binds	O
the	O
only	O
variable	O
in	O
one	O
object	O
.	O
</s>
<s>
ACS	O
give	O
a	O
sound	O
ground	O
for	O
applicative	B-Application
approach	I-Application
to	O
programming	O
.	O
</s>
<s>
Applicative	B-Application
computing	I-Application
systems	I-Application
 '	O
lack	O
of	O
storage	O
and	O
history	O
sensitivity	O
is	O
the	O
basic	O
reason	O
they	O
have	O
not	O
provided	O
a	O
foundation	O
for	O
computer	O
design	O
.	O
</s>
<s>
Moreover	O
,	O
most	O
applicative	O
systems	O
employ	O
the	O
substitution	O
operation	O
of	O
the	O
lambda	B-Language
calculus	I-Language
as	O
their	O
basic	O
operation	O
.	O
</s>
