<s>
A	O
fictional	B-General_Concept
currency	I-General_Concept
is	O
some	O
form	O
of	O
system	O
of	O
money	O
defined	O
,	O
depicted	O
,	O
or	O
alluded	O
to	O
,	O
in	O
works	O
of	O
fiction	O
,	O
such	O
as	O
novels	O
,	O
films	O
or	O
video	O
games	O
.	O
</s>
<s>
The	O
names	O
of	O
units	O
of	O
such	O
currency	O
are	O
sometimes	O
based	O
on	O
extant	O
or	O
historic	O
currencies	O
(	O
e.g.	O
</s>
<s>
A	O
particularly	O
common	O
type	O
,	O
especially	O
in	O
science	O
fiction	O
,	O
is	O
electronically	O
managed	O
"	O
credits	B-General_Concept
"	O
.	O
</s>
<s>
Authors	O
doing	O
worldbuilding	O
and	O
creating	O
imaginary	O
societies	O
have	O
to	O
take	O
care	O
when	O
naming	O
fictional	B-General_Concept
currencies	I-General_Concept
because	O
of	O
the	O
associations	O
between	O
currency	O
names	O
and	O
countries	O
;	O
recognizable	O
names	O
for	O
currencies	O
of	O
the	O
future	O
(	O
e.g.	O
</s>
<s>
Writers	O
need	O
not	O
explain	O
the	O
exact	O
value	O
of	O
their	O
fictional	B-General_Concept
currencies	I-General_Concept
or	O
provide	O
an	O
exchange	O
rate	O
to	O
modern	O
money	O
;	O
they	O
may	O
rely	O
on	O
the	O
intuitive	O
grasp	O
of	O
their	O
readers	O
,	O
for	O
instance	O
that	O
one	O
currency	O
unit	O
is	O
probably	O
of	O
little	O
value	O
,	O
but	O
that	O
millions	O
of	O
units	O
will	O
be	O
worth	O
a	O
lot	O
.	O
</s>
<s>
Authors	O
have	O
proposed	O
currencies	O
that	O
are	O
incapable	O
of	O
replication	O
such	O
as	O
the	O
non-replicable	O
"	O
latinum	O
"	O
used	O
by	O
the	O
Ferengi	O
in	O
the	O
Star	B-Operating_System
Trek	I-Operating_System
universe	O
,	O
or	O
the	O
currency	O
in	O
Pandora	O
's	O
Millions	O
by	O
George	O
O	O
.	O
Smith	O
,	O
which	O
is	O
booby-trapped	O
to	O
explode	O
if	O
scanned	O
by	O
a	O
replicating	O
machine	O
.	O
</s>
<s>
Money	O
in	O
fantasy	B-Application
fiction	I-Application
faces	O
analogous	O
challenges	O
from	O
the	O
use	O
of	O
magic	O
;	O
in	O
the	O
Harry	O
Potter	O
series	O
by	O
J	O
.	O
K	O
.	O
Rowling	O
,	O
magically	O
created	O
currency	O
is	O
time-limited	O
,	O
while	O
in	O
Ursula	O
K	O
.	O
Le	O
Guin	O
's	O
fictional	O
realm	O
of	O
Earthsea	O
,	O
the	O
world	O
's	O
equilibrium	O
is	O
unbalanced	O
when	O
something	O
is	O
created	O
from	O
nothing	O
.	O
</s>
<s>
In	O
some	O
cases	O
,	O
compound	O
interest	O
may	O
swell	O
small	O
amounts	O
into	O
a	O
fortune	O
,	O
as	O
happens	O
in	O
the	B-Application
Hitchhiker	I-Application
's	I-Application
Guide	I-Application
to	I-Application
the	I-Application
Galaxy	I-Application
by	O
Douglas	O
Adams	O
,	O
When	O
the	O
Sleeper	O
Wakes	O
by	O
H	O
.	O
G	B-General_Concept
.	O
Wells	O
,	O
and	O
the	O
Futurama	B-Application
episode	O
"	O
A	O
Fishful	O
of	O
Dollars	O
"	O
.	O
</s>
<s>
While	O
modern	O
fiat	O
currencies	O
lack	O
intrinsic	O
worth	O
,	O
some	O
fictional	B-General_Concept
currencies	I-General_Concept
are	O
designed	O
to	O
be	O
valuable	O
in	O
their	O
own	O
right	O
.	O
</s>
<s>
The	O
use	O
of	O
"	O
credits	B-General_Concept
"	O
is	O
particularly	O
common	O
in	O
futuristic	O
settings	O
,	O
so	O
much	O
so	O
that	O
Sam	O
Humphries	O
has	O
pointed	O
it	O
out	O
as	O
a	O
cliché	O
:	O
"	O
In	O
any	O
science-fiction	O
movie	O
,	O
anywhere	O
in	O
the	O
galaxy	O
,	O
currency	O
is	O
referred	O
to	O
as	O
'	O
credits	B-General_Concept
.	O
</s>
<s>
Credits	B-General_Concept
are	O
frequently	O
envisioned	O
as	O
a	O
form	O
of	O
electronic	O
money	O
.	O
</s>
