<s>
Android	B-Application
App	I-Application
Bundle	I-Application
is	O
the	O
Android	B-Application
application	I-Application
publishing	O
file	O
format	O
.	O
</s>
<s>
The	O
App	O
Bundle	O
must	O
include	O
the	O
application	O
's	O
compiled	B-Language
code	O
and	O
resources	O
,	O
which	O
allows	O
for	O
the	O
signing	O
and	O
generation	O
of	O
APK	B-Application
files	I-Application
to	O
be	O
deferred	O
to	O
the	O
app	B-Application
store	I-Application
,	O
reducing	O
the	O
initial	O
download	O
size	O
of	O
the	O
app	O
.	O
</s>
<s>
The	O
file	O
extension	O
used	O
for	O
this	O
format	O
is	O
"	O
.aab	B-Application
"	O
.	O
</s>
<s>
Google	B-Application
Play	I-Application
requires	O
Android	B-Application
App	I-Application
Bundles	I-Application
for	O
all	O
new	O
apps	O
since	O
August	O
2021	O
and	O
for	O
all	O
updates	O
to	O
preexisting	O
apps	O
since	O
November	O
2021	O
.	O
</s>
<s>
Starting	O
in	O
May	O
2023	O
,	O
Android	B-Application
TV	O
will	O
require	O
AABs	O
.	O
</s>
<s>
Without	O
Android	B-Application
App	I-Application
Bundles	I-Application
,	O
an	O
APK	B-Application
can	O
support	O
multiple	O
languages	O
,	O
up	O
to	O
four	O
different	O
CPU	B-General_Concept
architectures	I-General_Concept
,	O
and	O
several	O
display	B-General_Concept
resolutions	I-General_Concept
.	O
</s>
<s>
Split	O
APKs	B-Application
,	O
which	O
are	O
generated	O
by	O
an	O
app	B-Application
store	I-Application
like	O
Google	B-Application
Play	I-Application
,	O
contain	O
only	O
the	O
code	O
and	O
resources	O
that	O
are	O
needed	O
for	O
the	O
specific	O
device	O
downloading	O
the	O
app	O
.	O
</s>
<s>
If	O
the	O
user	O
changes	O
their	O
device	O
language	O
or	O
feature	O
set	O
,	O
the	O
app	B-Application
store	I-Application
can	O
then	O
deliver	O
additional	O
split	O
APKs	B-Application
on	O
demand	O
to	O
meet	O
the	O
changed	O
requirements	O
.	O
</s>
<s>
Android	B-Application
App	I-Application
Bundles	I-Application
are	O
required	O
for	O
using	O
"	O
play	O
as	O
you	O
download	O
"	O
feature	O
of	O
Google	B-Application
Play	I-Application
,	O
which	O
lets	O
users	O
download	O
and	O
install	O
a	O
portion	O
of	O
the	O
game	O
to	O
start	O
playing	O
and	O
then	O
download	O
the	O
rest	O
while	O
the	O
user	O
is	O
occupied	O
by	O
the	O
first	O
level	O
.	O
</s>
