<s>
In	O
computer	O
science	O
,	O
the	O
standard	B-Application
swap	I-Application
or	O
three	O
point	O
turn	O
is	O
a	O
programming	O
paradigm	O
that	O
exchanges	O
the	O
values	O
of	O
two	O
variables	O
.	O
</s>
<s>
In	O
modern	O
CPUs	B-Device
this	O
is	O
accomplished	O
on	O
the	O
processor	O
itself	O
,	O
in	O
a	O
single	O
machine	B-Language
instruction	I-Language
,	O
rather	O
than	O
having	O
to	O
go	O
through	O
RAM	B-Architecture
.	O
</s>
