<s>
DS:Style	B-Application
is	O
a	O
series	O
of	O
educational	B-Application
software	I-Application
products	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
console	O
.	O
</s>
<s>
The	O
first	O
nine	O
products	O
in	O
the	O
series	O
were	O
announced	O
on	O
April	O
4	O
,	O
2007	O
and	O
the	O
first	O
five	O
were	O
released	O
on	O
July	O
5	O
,	O
2007	O
;	O
the	O
last	O
DS:Style	B-Application
release	O
was	O
on	O
February	O
3	O
,	O
2011	O
.	O
</s>
<s>
While	O
not	O
a	O
part	O
of	O
the	O
DS:Style	B-Application
series	O
,	O
bookkeeping	O
and	O
real	O
estate	O
certification	O
products	O
(	O
Honki	O
de	O
Manabu	O
:	O
LEC	O
de	O
Goukaku	O
-	O
DS	B-Device
Hishou	O
Boki	O
3-Kyū	O
and	O
Honki	O
de	O
Manabu	O
:	O
LEC	O
de	O
Goukaku	O
-	O
DS	B-Device
Takuchi	O
Tatemono	O
Torihiki	O
Shuninsha	O
)	O
were	O
also	O
released	O
on	O
the	O
PlayStation	B-Operating_System
Portable	I-Operating_System
in	O
2010	O
.	O
</s>
<s>
They	O
felt	O
that	O
it	O
would	O
not	O
be	O
worth	O
localizing	O
the	O
products	O
to	O
sell	O
in	O
non-Japanese	O
markets	O
,	O
as	O
there	O
was	O
not	O
much	O
of	O
a	O
market	O
for	O
non-game	O
software	O
for	O
the	O
Nintendo	B-Device
DS	I-Device
without	O
heavy	O
advertising	O
,	O
due	O
to	O
prior	O
failures	O
in	O
promoting	O
such	O
products	O
.	O
</s>
