<s>
Depth	B-Device
Charge	I-Device
is	O
a	O
game	O
for	O
the	O
Apple	B-Device
II	I-Device
family	I-Device
of	O
computers	O
,	O
created	O
in	O
1978	B-Application
by	O
programmer	O
Chris	O
Oberth	O
and	O
published	O
by	O
The	O
Elektrik	O
Keyboard	O
of	O
Chicago	O
,	O
Illinois	O
.	O
</s>
<s>
Like	O
the	O
1977	O
arcade	O
game	O
Depthcharge	B-Application
that	O
it	O
emulates	O
,	O
Depth	B-Device
Charge	I-Device
puts	O
the	O
player	O
in	O
control	O
of	O
a	O
small	O
ship	O
that	O
drops	O
depth	B-Device
charges	I-Device
onto	O
passing	O
submarines	O
.	O
</s>
