<s>
Opaque	B-Operating_System
binary	I-Operating_System
blob	I-Operating_System
(	O
OBB	O
)	O
is	O
a	O
term	O
used	O
in	O
network	O
engineering	O
and	O
computer	B-General_Concept
science	I-General_Concept
to	O
refer	O
to	O
a	O
sizeable	O
piece	O
of	O
data	O
,	O
which	O
looks	O
like	O
binary	O
garbage	O
from	O
outside	O
,	O
by	O
entities	O
which	O
do	O
not	O
know	O
what	O
that	O
blob	O
denotes	O
or	O
carries	O
,	O
but	O
make	O
sense	O
to	O
entities	O
which	O
have	O
access	O
permission	O
and	O
access	O
functions	O
to	O
them	O
.	O
</s>
<s>
It	O
is	O
also	O
a	O
pejorative	O
term	O
for	O
compiled	B-Language
code	O
without	O
the	O
source	O
code	O
made	O
available	O
(	O
see	O
:	O
binary	O
blob	O
)	O
.	O
</s>
<s>
At	O
least	O
one	O
network	O
protocol	O
,	O
Advanced	B-Operating_System
Message	I-Operating_System
Queuing	I-Operating_System
Protocol	I-Operating_System
,	O
uses	O
the	O
terminology	O
of	O
OBB	O
.	O
</s>
<s>
Android	B-Application
operating	I-Application
systems	I-Application
,	O
starting	O
with	O
version	O
2.3	O
code	O
named	O
Gingerbread	O
,	O
use	O
OBBs	O
to	O
refer	O
in	O
one	O
blob	O
to	O
multiple	O
files	O
,	O
maybe	O
even	O
a	O
file	O
system	O
or	O
whole	O
file	O
system	O
in	O
one	O
file	O
.	O
</s>
<s>
These	O
OBBs	O
are	O
available	O
through	O
the	O
Storage	O
Manager	O
interface	O
in	O
Android	B-Application
.	O
</s>
<s>
This	O
is	O
done	O
as	O
a	O
means	O
of	O
abstraction	B-Application
,	O
so	O
multiple	O
applications	O
running	O
on	O
the	O
operating	B-General_Concept
system	I-General_Concept
can	O
more	O
easily	O
access	O
the	O
OBB	O
.	O
</s>
<s>
For	O
example	O
,	O
if	O
there	O
was	O
a	O
map	O
database	O
(	O
map	O
OBB	O
)	O
,	O
multiple	O
applications	O
running	O
on	O
Android	B-Application
2.3	O
can	O
access	O
the	O
same	O
maps	O
.	O
</s>
<s>
Many	O
HD	O
games	O
on	O
the	O
Android	B-Application
platform	I-Application
use	O
their	O
own	O
OBB	O
files	O
,	O
to	O
allow	O
storage	O
of	O
large	O
files	O
on	O
the	O
device	O
's	O
external	O
SD	O
card	O
.	O
</s>
<s>
Tuxedo	B-Application
middleware	O
also	O
uses	O
OBBs	O
to	O
mention	O
C	B-Language
and	O
C++	B-Language
arrays	B-Data_Structure
,	O
or	O
typed	O
data	B-General_Concept
buffers	I-General_Concept
.	O
</s>
<s>
When	O
a	O
vendor	O
distributes	O
software	O
in	O
an	O
object	O
binary	O
form	O
without	O
any	O
mention	O
of	O
its	O
inner	O
workings	O
or	O
code	O
,	O
it	O
is	O
called	O
a	O
'	O
proprietary	B-Application
OBB	O
 '	O
or	O
'	O
proprietary	B-Application
blob	O
 '	O
or	O
just	O
binary	O
blob	O
.	O
</s>
<s>
This	O
practice	O
is	O
to	O
protect	O
the	O
company	O
's	O
intellectual	O
property	O
,	O
and	O
probably	O
keep	O
a	O
competitive	O
edge	O
(	O
see	O
:	O
proprietary	B-Application
software	I-Application
)	O
.	O
</s>
<s>
As	O
an	O
example	O
,	O
Nvidia	B-Operating_System
Tegra	I-Operating_System
has	O
such	O
a	O
'	O
proprietary	B-Application
OBB.	O
'	O
</s>
