<s>
In	O
computer	B-General_Concept
programming	I-General_Concept
,	O
housekeeping	B-General_Concept
can	O
refer	O
to	O
either	O
a	O
standard	O
entry	O
or	O
exit	O
routine	O
appended	O
to	O
a	O
user-written	O
block	O
of	O
code	O
(	O
such	O
as	O
a	O
subroutine	O
or	O
function	O
,	O
sometimes	O
as	O
a	O
function	B-Language
prologue	I-Language
and	I-Language
epilogue	I-Language
)	O
at	O
its	O
entry	O
and	O
exit	O
or	O
,	O
alternatively	O
,	O
to	O
any	O
other	O
automated	O
or	O
manual	O
software	O
process	O
whereby	O
a	O
computer	O
is	O
cleaned	O
up	O
after	O
usage	O
(	O
e.g.	O
</s>
<s>
freeing	O
resources	O
such	O
as	O
virtual	B-Architecture
memory	I-Architecture
)	O
.	O
</s>
<s>
Housekeeping	B-General_Concept
can	O
be	O
described	O
as	O
a	O
necessary	O
chore	O
,	O
required	O
to	O
perform	O
a	O
particular	O
computer	O
's	O
normal	O
activity	O
but	O
not	O
necessarily	O
part	O
of	O
the	O
algorithm	O
.	O
</s>
<s>
For	O
cleaning	O
up	O
computer	B-Device
disk	I-Device
storage	I-Device
,	O
utility	O
software	O
usually	O
exists	O
for	O
this	O
purpose	O
such	O
as	O
data	B-General_Concept
compression	I-General_Concept
software	O
-	O
to	O
"	O
shrink	O
"	O
files	O
and	O
release	O
disk	B-Device
space	O
and	O
defragmentation	B-Application
programs	O
-	O
to	O
improve	O
disk	B-Device
performance	O
.	O
</s>
<s>
Housekeeping	B-General_Concept
could	O
include	O
(	O
but	O
is	O
not	O
limited	O
to	O
)	O
the	O
following	O
activities	O
:	O
</s>
<s>
Execution	O
of	O
disk	B-Device
maintenance	O
utilities	O
(	O
e.g.	O
</s>
