<s>
Android	B-Application
Runtime	O
for	O
Chrome	B-Operating_System
(	O
ARC	O
)	O
is	O
a	O
compatibility	O
layer	O
and	O
sandboxing	O
technology	O
for	O
running	O
Android	B-Application
applications	I-Application
on	O
desktop	O
and	O
laptop	O
computers	O
in	O
an	O
isolated	O
environment	O
.	O
</s>
<s>
It	O
allows	O
applications	O
to	O
be	O
safely	O
run	O
from	O
a	O
web	B-Application
browser	I-Application
,	O
independent	O
of	O
user	O
operating	O
system	O
,	O
at	O
near-native	O
speeds	O
.	O
</s>
<s>
The	O
Android	B-Application
Runtime	O
for	O
Chrome	B-Operating_System
is	O
a	O
partially	O
open-sourced	B-Application
project	O
under	O
development	O
by	O
Google	B-Application
.	I-Application
</s>
<s>
It	O
was	O
announced	O
by	O
Sundar	O
Pichai	O
at	O
the	B-Application
Google	I-Application
I/O	O
2014	O
developer	O
conference	O
.	O
</s>
<s>
In	O
a	O
limited	O
beta	O
consumer	O
release	O
in	O
September	O
2014	O
,	O
Duolingo	B-Application
,	O
Evernote	B-Application
,	O
Sight	O
Words	O
,	O
and	O
Vine	B-Application
Android	B-Application
applications	I-Application
were	O
made	O
available	O
in	O
the	O
Chrome	B-Application
Web	I-Application
Store	I-Application
for	O
installation	O
on	O
Chromebook	B-Operating_System
devices	O
running	O
OS	O
version	O
37	O
or	O
higher	O
.	O
</s>
<s>
,	O
the	O
development	O
by	O
Google	B-Application
is	O
taking	O
place	O
behind	O
closed	O
doors	O
with	O
individual	O
repository	O
commits	O
,	O
code	O
reviews	O
and	O
most	O
issue	O
tracking	O
being	O
kept	O
internal	O
to	O
the	O
company	O
.	O
</s>
<s>
The	O
open	O
sourced	O
parts	O
of	O
ARC	O
are	O
licensed	O
under	O
a	O
BSD-style	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
In	O
a	O
limited	O
beta	O
consumer	O
release	O
in	O
September	O
2014	O
,	O
Duolingo	B-Application
,	O
Evernote	B-Application
,	O
Sight	O
Words	O
,	O
and	O
Vine	B-Application
Android	B-Application
applications	I-Application
were	O
made	O
available	O
in	O
the	O
Chrome	B-Application
Web	I-Application
Store	I-Application
for	O
installation	O
on	O
Chromebook	B-Operating_System
devices	O
running	O
OS	O
version	O
37	O
or	O
higher	O
.	O
</s>
<s>
In	O
October	O
2014	O
,	O
three	O
more	O
apps	O
were	O
added	O
:	O
CloudMagic	B-Protocol
,	O
Onefootball	O
,	O
and	O
Podcast	O
Addict	O
.	O
</s>
<s>
In	O
March	O
2015	O
,	O
Anandtech	O
reported	O
that	O
VLC	B-Application
media	I-Application
player	I-Application
should	O
be	O
added	O
in	O
the	O
coming	O
months	O
.	O
</s>
<s>
On	O
April	O
1	O
,	O
2015	O
,	O
Google	B-Application
released	O
ARC	O
Welder	O
,	O
a	O
Chrome	B-Operating_System
Packaged	O
App	O
providing	O
the	O
ARC	O
runtime	O
and	O
application	O
packager	O
.	O
</s>
<s>
It	O
is	O
intended	O
to	O
give	O
Android	B-Application
developers	O
a	O
preview	O
of	O
the	O
upcoming	O
technology	O
and	O
a	O
chance	O
to	O
test	O
their	O
Android	B-Application
apps	O
on	O
the	O
Chrome	B-Operating_System
platform	O
.	O
</s>
<s>
ARC	O
builds	O
upon	O
the	B-Application
Google	I-Application
Native	B-Application
Client	I-Application
.	O
</s>
<s>
The	O
Native	B-Application
Client	I-Application
platform	O
is	O
being	O
extended	O
with	O
a	O
POSIX-compatible	O
layer	O
on	O
top	O
of	O
the	O
NaCl	B-Application
Integrated	O
Runtime	O
and	O
Pepper	O
APIs	O
which	O
emulate	O
the	O
Linux	B-Application
environment	O
in	O
the	O
foundation	O
of	O
an	O
Android	B-Application
phone	I-Application
.	O
</s>
<s>
ARC	O
uses	O
the	O
Chrome	B-Operating_System
permission	O
system	O
,	O
not	O
the	O
Android	B-Application
one	O
.	O
</s>
<s>
According	O
to	O
a	O
security	O
evaluation	O
by	O
Meng	O
Xu	O
,	O
ARC	O
apps	O
may	O
communicate	O
with	O
other	O
installed	O
Chrome	B-Operating_System
Extensions	O
and	O
the	O
files	O
stored	O
on	O
the	O
underlying	O
operating	O
system	O
which	O
might	O
open	O
avenues	O
to	O
various	O
attacks	O
.	O
</s>
<s>
During	O
the	O
second	O
half	O
of	O
2014	O
,	O
before	O
any	O
developer	O
tools	O
or	O
documentation	O
was	O
released	O
by	O
Google	B-Application
,	O
several	O
community	O
efforts	O
about	O
ARC	O
appeared	O
.	O
</s>
<s>
Vlad	O
Filippov	O
maintains	O
ARChon	O
,	O
an	O
unofficial	O
distribution	O
of	O
the	O
ARC	O
runtime	O
which	O
can	O
be	O
installed	O
to	O
non-Chromebook	O
computers	O
.	O
</s>
<s>
The	O
same	O
developer	O
also	O
maintains	O
a	O
JavaScript	B-Language
(	O
nodejs	O
)	O
tool	O
to	O
automate	O
packaging	O
Android	B-Application
apps	O
for	O
use	O
with	O
ARC	O
.	O
</s>
<s>
Other	O
developers	O
created	O
more	O
user-friendly	O
tools	O
beyond	O
chromeos-apk	O
to	O
simplify	O
packaging	O
applications	O
for	O
the	O
ARCon	O
runtime	O
.	O
</s>
<s>
The	O
first	O
of	O
them	O
is	O
a	O
Chrome	B-Operating_System
Packaged	O
App	O
called	O
twerk	O
and	O
the	O
other	O
is	O
an	O
Android	B-Application
application	I-Application
ARCon	O
Packager	O
It	O
used	O
to	O
be	O
named	O
Chrome	B-Operating_System
APK	O
Packager	O
but	O
the	O
name	O
was	O
changed	O
at	O
Google	B-Application
's	I-Application
request	O
.	O
</s>
<s>
There	O
is	O
an	O
active	O
Reddit	O
community	O
which	O
maintains	O
a	O
list	O
of	O
Android	B-Application
apps	O
that	O
work	O
with	O
the	O
ARCon	O
runtime	O
.	O
</s>
<s>
Vlad	O
Filippov	O
published	O
a	O
guide	O
how	O
to	O
run	O
Opera	O
Mini	O
inside	O
Chromium	O
browser	B-Application
.	O
</s>
<s>
Some	O
developers	O
expressed	O
confusion	O
about	O
the	O
wide	O
scale	O
of	O
competing	O
development	O
platforms	O
which	O
Google	B-Application
now	O
offers	O
:	O
Web	O
apps	O
,	O
Chrome	B-Operating_System
Packaged	O
Apps	O
and	O
Android	B-Application
Apps	O
delivered	O
through	O
ARC	O
.	O
</s>
<s>
Google	B-Application
responded	O
that	O
they	O
are	O
fully	O
committed	O
to	O
all	O
those	O
platforms	O
and	O
encourage	O
developers	O
to	O
choose	O
the	O
one	O
that	O
fits	O
them	O
best	O
.	O
</s>
