<s>
webOS	B-Operating_System
,	O
also	O
known	O
as	O
LG	B-Operating_System
webOS	I-Operating_System
and	O
previously	O
known	O
as	O
Open	B-Operating_System
webOS	I-Operating_System
,	O
HP	B-Operating_System
webOS	I-Operating_System
and	O
Palm	B-Operating_System
webOS	I-Operating_System
,	O
is	O
a	O
Linux	O
kernel-based	O
multitasking	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
for	O
smart	B-Device
devices	I-Device
such	O
as	O
smart	B-Device
TVs	I-Device
that	O
has	O
also	O
been	O
used	O
as	O
a	O
mobile	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
Initially	O
developed	O
by	O
Palm	O
,	O
Inc	O
.	O
(	O
which	O
was	O
acquired	O
by	O
Hewlett-Packard	O
)	O
,	O
HP	O
made	O
the	O
platform	O
open	B-Application
source	I-Application
,	O
at	O
which	O
point	O
it	O
became	O
Open	B-Operating_System
webOS	I-Operating_System
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
was	O
later	O
sold	O
to	O
LG	O
Electronics	O
,	O
and	O
was	O
made	O
primarily	O
a	O
smart	B-Device
TV	I-Device
operating	I-Device
system	I-Device
for	O
LG	O
televisions	O
as	O
a	O
successor	O
to	O
LG	O
Netcast	O
.	O
</s>
<s>
In	O
January	O
2014	O
,	O
Qualcomm	O
announced	O
that	O
it	O
had	O
acquired	O
technology	O
patents	O
from	O
HP	O
,	O
which	O
included	O
all	O
the	O
webOS	B-Operating_System
and	O
Palm	O
patents	O
;	O
LG	O
licenses	O
them	O
to	O
use	O
in	O
their	O
devices	O
.	O
</s>
<s>
Various	O
versions	O
of	O
webOS	B-Operating_System
have	O
been	O
featured	O
on	O
several	O
devices	O
since	O
launching	O
in	O
2009	O
,	O
including	O
Pre	B-Application
,	O
Pixi	B-Application
,	O
and	O
Veer	B-Application
smartphones	B-Application
,	O
TouchPad	B-Application
tablet	B-Device
,	O
LG	O
's	O
smart	B-Device
TVs	I-Device
since	O
2014	O
,	O
LG	O
's	O
smart	O
refrigerators	O
and	O
smart	O
projectors	O
since	O
2017	O
.	O
</s>
<s>
Palm	O
launched	O
webOS	B-Operating_System
,	O
then	O
called	O
Palm	B-Operating_System
webOS	I-Operating_System
,	O
in	O
January	O
2009	O
as	O
the	O
successor	O
to	O
Palm	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
The	O
first	O
webOS	B-Operating_System
device	O
was	O
the	O
original	O
Palm	B-Application
Pre	I-Application
,	O
released	O
by	O
Sprint	O
in	O
June	O
2009	O
.	O
</s>
<s>
The	O
Palm	B-Application
Pixi	I-Application
followed	O
.	O
</s>
<s>
Upgraded	O
"	O
Plus	O
"	O
versions	O
of	O
both	O
Pre	B-Application
and	O
Pixi	B-Application
were	O
released	O
on	O
Verizon	O
and	O
AT&T	O
.	O
</s>
<s>
Later	O
,	O
webOS	B-Operating_System
was	O
described	O
by	O
new	O
HP	O
CEO	O
Leo	O
Apotheker	O
as	O
a	O
key	O
asset	O
and	O
motivation	O
for	O
the	O
purchase	O
.	O
</s>
<s>
HP	O
indicated	O
its	O
intention	O
to	O
develop	O
the	O
webOS	B-Operating_System
platform	O
for	O
use	O
in	O
multiple	O
new	O
products	O
,	O
including	O
smartphones	B-Application
,	O
tablets	B-Device
,	O
and	O
printers	O
.	O
</s>
<s>
In	O
February	O
2011	O
,	O
HP	O
announced	O
that	O
it	O
would	O
use	O
webOS	B-Operating_System
as	O
the	O
universal	O
platform	O
for	O
all	O
its	O
devices	O
.	O
</s>
<s>
However	O
,	O
HP	O
also	O
made	O
the	O
decision	O
that	O
the	O
Palm	B-Application
Pre	I-Application
,	O
Palm	B-Application
Pixi	I-Application
,	O
and	O
the	O
"	O
Plus	O
"	O
revisions	O
would	O
not	O
receive	O
over-the-air	O
updates	O
to	O
webOS	B-Operating_System
2.0	O
,	O
despite	O
a	O
previous	O
commitment	O
to	O
an	O
upgrade	O
"	O
in	O
coming	O
months.	O
"	O
</s>
<s>
HP	O
announced	O
several	O
webOS	B-Operating_System
devices	O
,	O
including	O
the	O
HP	B-Application
Veer	I-Application
and	O
HP	B-Application
Pre	I-Application
3	I-Application
smartphones	B-Application
,	O
running	O
webOS	B-Operating_System
2.2	O
,	O
and	O
the	O
HP	B-Application
TouchPad	I-Application
,	O
a	O
tablet	B-Device
computer	I-Device
released	O
in	O
July	O
2011	O
that	O
runs	O
webOS	B-Operating_System
3.0	O
.	O
</s>
<s>
In	O
March	O
2011	O
,	O
HP	O
announced	O
plans	O
for	O
a	O
version	O
of	O
webOS	B-Operating_System
by	O
the	O
end	O
of	O
2011	O
to	O
run	O
within	O
Windows	B-Application
,	O
and	O
to	O
be	O
installed	O
on	O
all	O
HP	O
desktop	O
and	O
notebook	O
computers	O
in	O
2012	O
.	O
</s>
<s>
In	O
August	O
2011	O
,	O
HP	O
announced	O
that	O
it	O
was	O
interested	O
in	O
selling	O
its	O
Personal	O
Systems	O
Group	O
,	O
responsible	O
for	O
all	O
of	O
its	O
consumer	O
PC	O
products	O
,	O
including	O
webOS	B-Operating_System
,	O
and	O
that	O
webOS	B-Operating_System
device	O
development	O
and	O
production	O
lines	O
would	O
be	O
halted	O
.	O
</s>
<s>
It	O
remained	O
unclear	O
whether	O
HP	O
would	O
consider	O
licensing	O
webOS	B-Operating_System
software	O
to	O
other	O
manufacturers	O
.	O
</s>
<s>
When	O
HP	O
reduced	O
the	O
price	O
of	O
the	O
Touchpad	B-Application
to	O
$99	O
,	O
the	O
existing	O
inventory	O
quickly	O
sold	O
out	O
.	O
</s>
<s>
The	O
HP	B-Application
Pre	I-Application
3	I-Application
was	O
launched	O
in	O
select	O
areas	O
of	O
Europe	O
,	O
and	O
US-based	O
units	O
were	O
available	O
only	O
through	O
unofficial	O
channels	O
(	O
both	O
AT&T	O
and	O
Verizon	O
canceled	O
their	O
orders	O
just	O
prior	O
to	O
delivery	O
after	O
Apotheker	O
's	O
(	O
HP	O
's	O
CEO	O
at	O
the	O
time	O
)	O
announcement	O
.	O
</s>
<s>
Notably	O
,	O
these	O
US	O
Pre	B-Application
3	I-Application
units	O
,	O
having	O
been	O
released	O
through	O
unofficial	O
channels	O
,	O
lacked	O
both	O
warranties	O
and	O
carried	O
no	O
support	O
obligation	O
from	O
HP	O
;	O
as	O
a	O
result	O
parts	O
are	O
nearly	O
impossible	O
to	O
come	O
by	O
.	O
</s>
<s>
HP	O
announced	O
that	O
it	O
would	O
continue	O
to	O
issue	O
updates	O
for	O
the	O
HP	B-Application
Veer	I-Application
and	O
HP	B-Application
TouchPad	I-Application
,	O
but	O
these	O
updates	O
have	O
failed	O
to	O
materialize	O
for	O
the	O
former	O
,	O
and	O
the	O
latter	O
saw	O
a	O
final	O
,	O
unofficial	O
release	O
called	O
"	O
webOS	B-Operating_System
CE	O
"	O
that	O
contained	O
only	O
open-sourced	O
components	O
of	O
webOS	B-Operating_System
meant	O
for	O
what	O
remained	O
of	O
the	O
developer	O
community	O
rather	O
than	O
a	O
conventional	O
,	O
user-centric	O
update	O
to	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
last	O
HP	B-Operating_System
webOS	I-Operating_System
version	O
,	O
3.0.5	O
,	O
was	O
released	O
on	O
January	O
12	O
,	O
2012	O
.	O
</s>
<s>
In	O
December	O
2011	O
,	O
after	O
abandoning	O
the	O
TouchPad	B-Application
and	O
the	O
proposed	O
sale	O
of	O
the	O
HP	O
Personal	O
Systems	O
Group	O
,	O
HP	O
announced	O
it	O
would	O
release	O
webOS	B-Operating_System
source	O
code	O
in	O
the	O
near	O
future	O
under	O
an	O
open-source	B-Application
license	O
.	O
</s>
<s>
In	O
August	O
2012	O
,	O
code	O
specific	O
to	O
the	O
existing	O
devices	O
was	O
released	O
as	O
webOS	B-Operating_System
Community	O
Edition	O
(	O
CE	O
)	O
,	O
with	O
support	O
for	O
the	O
existing	O
HP	O
hardware	O
.	O
</s>
<s>
Open	B-Operating_System
webOS	I-Operating_System
includes	O
open	B-Application
source	I-Application
libraries	O
designed	O
to	O
target	O
a	O
wider	O
range	O
of	O
hardware	O
.	O
</s>
<s>
HP	O
renamed	O
its	O
webOS	B-Operating_System
unit	O
as	O
"	O
Gram	O
"	O
.	O
</s>
<s>
In	O
February	O
2012	O
,	O
HP	O
released	O
Isis	O
,	O
a	O
new	O
web	O
browser	O
for	O
Open	B-Operating_System
webOS	I-Operating_System
.	O
</s>
<s>
The	O
HP	O
App	O
Catalog	O
was	O
an	O
app	B-Application
store	I-Application
for	O
apps	O
for	O
the	O
mobile	B-Application
devices	I-Application
running	O
webOS	B-Operating_System
.	O
</s>
<s>
On	O
June	O
6	O
,	O
2009	O
,	O
webOS	B-Operating_System
launched	O
on	O
the	O
Palm	B-Application
Pre	I-Application
with	O
18	O
available	O
apps	O
.	O
</s>
<s>
Examples	O
include	O
the	O
apps	O
for	O
The	O
New	O
York	O
Times	O
and	O
Pandora	B-Application
Radio	I-Application
.	O
</s>
<s>
On	O
February	O
25	O
,	O
2013	O
,	O
HP	O
announced	O
that	O
it	O
was	O
selling	O
webOS	B-Operating_System
to	O
LG	O
Electronics	O
for	O
use	O
on	O
its	O
web-enabled	O
smart	B-Device
TVs	I-Device
,	O
replacing	O
its	O
previous	O
NetCast	O
platform	O
.	O
</s>
<s>
However	O
,	O
HP	O
would	O
still	O
hold	O
on	O
to	O
patents	O
from	O
Palm	O
as	O
well	O
as	O
cloud-based	B-Architecture
services	O
such	O
as	O
the	O
App	O
Catalog	O
.	O
</s>
<s>
In	O
2014	O
,	O
HP	O
sold	O
its	O
webOS	B-Operating_System
patents	O
to	O
Qualcomm	O
.	O
</s>
<s>
As	O
well	O
as	O
its	O
use	O
as	O
an	O
OS	O
for	O
smart	B-Device
TVs	I-Device
,	O
LG	O
has	O
expanded	O
its	O
use	O
to	O
various	O
Internet	B-Operating_System
of	I-Operating_System
things	I-Operating_System
devices	O
.	O
</s>
<s>
As	O
a	O
starting	O
point	O
,	O
LG	O
showcased	O
a	O
LG	O
Wearable	O
Platform	O
OS	O
(	O
webOS	B-Operating_System
)	O
smartwatch	O
in	O
early	O
2015	O
.	O
</s>
<s>
At	O
CES	O
2017	O
,	O
LG	O
announced	O
a	O
smart	O
refrigerator	O
with	O
webOS	B-Operating_System
.	O
</s>
<s>
On	O
March	O
19	O
,	O
2018	O
,	O
LG	O
announced	O
an	O
open-source	B-Application
edition	O
of	O
webOS	B-Operating_System
.	O
</s>
<s>
This	O
edition	O
would	O
allow	O
developers	O
to	O
download	O
the	O
source	O
code	O
for	O
free	O
as	O
well	O
as	O
take	O
advantage	O
of	O
related	O
tools	O
,	O
guides	O
,	O
and	O
forums	O
on	O
its	O
new	O
open	B-Application
source	I-Application
website	O
to	O
become	O
more	O
familiar	O
with	O
webOS	B-Operating_System
and	O
its	O
inherent	O
benefits	O
as	O
a	O
smart	B-Device
device	I-Device
's	O
platform	O
.	O
</s>
<s>
The	O
webOS	B-Operating_System
mobile	B-Application
platform	I-Application
introduced	O
some	O
innovative	O
features	O
,	O
such	O
as	O
the	O
cards	O
interface	O
or	O
the	O
gesture	O
navigation	O
,	O
that	O
are	O
still	O
in	O
use	O
by	O
Apple	O
,	O
Microsoft	O
and	O
Google	B-Application
on	O
their	O
mobile	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
iOS	B-Application
,	O
Windows	B-Protocol
Phone	I-Protocol
,	O
and	O
Android	B-Application
,	O
respectively	O
.	O
</s>
<s>
Navigation	O
uses	O
multi-touch	B-Application
gestures	O
on	O
the	O
touchscreen	B-Device
.	O
</s>
<s>
The	O
interface	O
uses	O
"	O
cards	O
"	O
to	O
manage	O
multitasking	B-Operating_System
and	O
represent	O
apps	O
.	O
</s>
<s>
webOS	B-Operating_System
2.0	O
introduced	O
'	O
stacks	O
 '	O
,	O
where	O
related	O
cards	O
could	O
be	O
"	O
stacked	O
"	O
together	O
.	O
</s>
<s>
Similar	O
capabilities	O
pull	O
together	O
calendars	O
and	O
also	O
instant	B-Application
messages	I-Application
and	O
SMS	B-Device
text	O
messages	O
from	O
multiple	O
sources	O
.	O
</s>
<s>
The	O
notification	O
area	O
is	O
located	O
on	O
the	O
bottom	O
portion	O
of	O
the	O
screen	O
on	O
phones	O
,	O
and	O
on	O
the	O
top	O
status	O
bar	O
area	O
on	O
tablets	B-Device
.	O
</s>
<s>
Due	O
to	O
the	O
resizable	O
nature	O
of	O
the	O
Mojo	O
and	O
Enyo	B-Language
application	O
frameworks	O
,	O
the	O
app	O
usually	O
resizes	O
itself	O
to	O
allow	O
unhindered	O
use	O
while	O
the	O
notification	O
is	O
displayed	O
.	O
</s>
<s>
By	O
default	O
,	O
data	O
sync	B-General_Concept
uses	O
a	O
cloud-based	B-Architecture
approach	O
rather	O
than	O
using	O
a	O
desktop	O
sync	B-General_Concept
client	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
webOS	B-Operating_System
shipped	O
with	O
the	O
ability	O
to	O
sync	B-General_Concept
with	O
Apple	O
's	O
iTunes	O
software	O
by	O
masquerading	O
as	O
an	O
Apple	O
device	O
,	O
but	O
this	O
feature	O
was	O
disabled	O
by	O
subsequent	O
iTunes	O
software	O
updates	O
.	O
</s>
<s>
On	O
HP	B-Operating_System
webOS	I-Operating_System
,	O
officially	O
vetted	O
third-party	O
apps	O
are	O
accessible	O
to	O
be	O
installed	O
on	O
the	O
device	O
from	O
the	O
HP	O
App	O
Catalog	O
.	O
</s>
<s>
As	O
HP	B-Operating_System
webOS	I-Operating_System
replaced	O
Palm	B-Operating_System
OS	I-Operating_System
,	O
Palm	O
commissioned	O
MotionApps	O
to	O
code	O
and	O
develop	O
an	O
emulator	B-Application
called	O
Classic	O
,	O
to	O
enable	O
backward	O
compatibility	O
to	O
Palm	B-Operating_System
OS	I-Operating_System
apps	O
.	O
</s>
<s>
This	O
operates	O
with	O
webOS	B-Operating_System
version	O
1.0	O
.	O
</s>
<s>
Palm	B-Operating_System
OS	I-Operating_System
emulation	B-Application
was	O
discontinued	O
in	O
WebOS	B-Operating_System
version	O
2.0	O
.	O
</s>
<s>
Another	O
source	O
of	O
applications	B-Application
is	O
homebrew	B-Application
software	I-Application
.	O
</s>
<s>
Homebrew	B-Application
apps	O
are	O
not	O
directly	O
supported	O
by	O
HP	O
.	O
</s>
<s>
Programs	O
used	O
to	O
distribute	O
homebrew	B-Application
webOS	B-Operating_System
apps	O
include	O
webOS	B-Operating_System
Quick	O
Install	O
(	O
Java-based	O
sideloader	O
for	O
desktop	O
computers	O
)	O
and	O
Preware	O
(	O
a	O
homebrew	B-Application
webOS	B-Operating_System
app	O
catalog	O
,	O
which	O
must	O
be	O
sideloaded	O
)	O
.	O
</s>
<s>
If	O
software	O
problems	O
do	O
occur	O
after	O
installing	O
homebrew	B-Application
programs	O
,	O
"	O
webOS	B-Operating_System
Doctor	O
"	O
(	O
provided	O
by	O
HP	O
)	O
can	O
restore	O
a	O
phone	O
back	O
to	O
factory	O
settings	O
and	O
remove	O
changes	O
made	O
by	O
homebrew	B-Application
apps	O
and	O
patches	O
.	O
</s>
<s>
LG	O
has	O
redesigned	O
the	O
UI	O
of	O
webOS	B-Operating_System
,	O
maintaining	O
the	O
card	O
UI	O
as	O
a	O
feature	O
called	O
"	O
Simple	O
switching	O
"	O
between	O
open	O
TV	O
apps	O
.	O
</s>
<s>
The	O
other	O
two	O
features	O
promoted	O
by	O
the	O
company	O
are	O
a	O
simple	O
connection	O
(	O
using	O
an	O
animated	O
Clippy-like	O
character	O
called	O
Beanbird	O
to	O
aid	O
the	O
user	O
through	O
setup	O
)	O
,	O
and	O
simple	O
discovery	O
.	O
</s>
<s>
Underneath	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
,	O
webOS	B-Operating_System
has	O
much	O
in	O
common	O
with	O
mainstream	O
Linux	B-Application
distributions	I-Application
.	O
</s>
<s>
Versions	O
1.0	O
to	O
2.1	O
use	O
a	O
patched	O
Linux	O
2.6.24	O
kernel	B-Operating_System
.	O
</s>
<s>
The	O
list	O
of	O
open-source	B-Application
components	O
used	O
by	O
the	O
different	O
releases	O
of	O
webOS	B-Operating_System
,	O
as	O
well	O
as	O
the	O
source	O
code	O
of	O
and	O
patches	O
applied	O
to	O
each	O
component	O
,	O
is	O
available	O
at	O
the	O
Palm	O
Open	B-Application
Source	I-Application
webpage	O
.	O
</s>
<s>
This	O
page	O
also	O
serves	O
as	O
a	O
reference	O
listing	O
of	O
the	O
versions	O
of	O
webOS	B-Operating_System
that	O
have	O
been	O
publicly	O
released	O
.	O
</s>
<s>
In	O
2011	O
,	O
Enyo	B-Language
replaced	O
Mojo	O
,	O
released	O
in	O
June	O
2009	O
,	O
as	O
the	O
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
.	O
</s>
