<s>
Billback	B-Application
or	O
bill	O
back	O
is	O
an	O
accounting	O
service	O
or	O
suite	O
of	O
software	O
that	O
is	O
used	O
for	O
cost	O
recovery	O
.	O
</s>
<s>
With	O
a	O
billback	B-Application
system	O
,	O
the	O
client	O
or	O
payer	O
is	O
charged	O
a	O
percentage	O
of	O
the	O
total	O
cost	O
of	O
equipment	O
,	O
services	O
,	O
and	O
venues	O
of	O
which	O
they	O
have	O
already	O
used	O
.	O
</s>
<s>
Billback	B-Application
systems	O
track	O
usage	O
from	O
concert	O
halls	O
to	O
toothpicks	O
,	O
add	O
the	O
costs	O
up	O
,	O
divide	O
it	O
all	O
out	O
,	O
and	O
calculate	O
the	O
price	O
per	O
usage	O
by	O
hours	O
,	O
minutes	O
,	O
seconds	O
,	O
pieces	O
,	O
visits	O
,	O
clicks	O
,	O
views	O
etc	O
.	O
</s>
<s>
Computerized	O
billback	B-Application
systems	O
are	O
useful	O
for	O
occasions	O
that	O
were	O
traditionally	O
difficult	O
to	O
keep	O
track	O
of	O
and	O
where	O
costs	O
were	O
covered	O
with	O
a	O
blanket	O
revenue	O
.	O
</s>
