<s>
System	B-Application
15000	I-Application
is	O
a	O
1984	B-Application
video	O
game	O
by	O
A.V.S.	O
</s>
<s>
Versions	O
were	O
later	O
ported	O
to	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
BBC	B-Device
Micro	I-Device
,	O
both	O
written	O
in	O
BASIC	O
.	O
</s>
<s>
Advertisements	O
for	O
System	B-Application
15000	I-Application
challenged	O
gamers	O
to	O
"	O
Beat	O
It	O
"	O
,	O
in	O
reference	O
to	O
the	O
Michael	O
Jackson	O
hit	O
from	O
1983	O
.	O
</s>
<s>
When	O
users	O
enter	O
the	O
System	B-Application
15000	I-Application
User	O
Network	O
in	O
the	O
game	O
and	O
select	O
option	O
1	O
,	O
it	O
lists	O
the	O
then	O
current	O
lineup	O
of	O
AVS	O
games	O
,	O
including	O
Flight	O
Zero-One	O
Five	O
(	O
VIC-20	O
)	O
,	O
Whirlwind	O
One-Five	O
(	O
VIC-20	O
)	O
and	O
"	O
15000	O
Series	O
Games	O
"	O
(	O
CBM	O
64/BBC	O
B	O
)	O
.	O
</s>
<s>
(	O
All	O
games	O
have	O
the	O
number	O
one	O
and	O
five	O
in	O
them	O
,	O
as	O
does	O
the	O
$1.5	O
million	O
figure	O
stolen	O
in	O
System	B-Application
15000	I-Application
.	O
)	O
</s>
