<s>
Blackjack	B-Application
is	O
a	O
video	O
game	O
simulation	O
of	O
blackjack	B-Application
programmed	O
by	O
Bob	O
Whitehead	O
and	O
published	O
by	O
Atari	O
,	O
Inc	O
.	O
for	O
its	O
Video	B-General_Concept
Computer	I-General_Concept
System	I-General_Concept
(	O
later	O
known	O
as	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
)	O
.	O
</s>
<s>
The	O
game	O
was	O
one	O
of	O
the	O
nine	O
launch	O
titles	O
available	O
when	O
the	O
Atari	B-General_Concept
2600	I-General_Concept
went	O
on	O
sale	O
in	O
September	O
1977	O
.	O
</s>
<s>
The	O
player	O
uses	O
the	O
paddle	B-Device
controller	I-Device
to	O
enter	O
a	O
bet	O
of	O
up	O
to	O
25	O
chips	O
from	O
an	O
initial	O
stack	O
of	O
200	O
.	O
</s>
<s>
Due	O
to	O
a	O
glitch	O
in	O
the	O
program	O
,	O
while	O
a	O
player	O
is	O
selecting	O
among	O
the	O
options	O
of	O
what	O
to	O
do	O
with	O
the	O
current	O
hand	O
by	O
pressing	O
left	O
or	O
right	O
with	O
the	O
paddle	B-Device
controller	I-Device
,	O
the	O
amount	O
of	O
the	O
player	O
's	O
next	O
bet	O
is	O
modified	O
even	O
though	O
it	O
is	O
defined	O
by	O
a	O
variable	O
that	O
will	O
not	O
be	O
visible	O
until	O
the	O
end	O
of	O
the	O
hand	O
,	O
requiring	O
the	O
player	O
to	O
carefully	O
re-enter	O
it	O
at	O
the	O
start	O
of	O
every	O
hand	O
without	O
pressing	O
the	O
button	O
carelessly	O
or	O
risk	O
wagering	O
an	O
unintended	O
amount	O
.	O
</s>
<s>
Blackjack	B-Application
was	O
reviewed	O
favorably	O
in	O
Video	O
magazine	O
as	O
part	O
of	O
a	O
general	O
review	O
of	O
the	O
Atari	B-General_Concept
VCS	I-General_Concept
.	O
</s>
