<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
(	O
sometimes	O
abbreviated	O
Y	B-Application
!	I-Application
M	I-Application
)	O
was	O
an	O
advertisement-supported	O
instant	B-Application
messaging	I-Application
client	B-Protocol
and	O
associated	O
protocol	O
provided	O
by	O
Yahoo	B-Application
!	I-Application
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
was	O
provided	O
free	O
of	O
charge	O
and	O
could	O
be	O
downloaded	O
and	O
used	O
with	O
a	O
generic	O
"	O
Yahoo	B-Application
ID	O
"	O
which	O
also	O
allowed	O
access	O
to	O
other	O
Yahoo	B-Application
!	I-Application
</s>
<s>
services	O
,	O
such	O
as	O
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
service	O
also	O
offered	O
VoIP	B-Application
,	O
file	O
transfers	O
,	O
webcam	O
hosting	O
,	O
a	O
text	O
messaging	B-Protocol
service	O
,	O
and	O
chat	O
rooms	O
in	O
various	O
categories	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
dates	O
back	O
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
actual	O
client	B-Protocol
,	O
originally	O
called	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Pager	O
,	O
launched	O
on	O
March	O
9	O
,	O
1998	O
and	O
renamed	O
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
In	O
addition	O
to	O
instant	B-Application
messaging	I-Application
features	O
similar	O
to	O
those	O
offered	O
by	O
ICQ	B-Protocol
,	O
it	O
also	O
offered	O
(	O
on	O
Microsoft	B-Application
Windows	I-Application
)	O
features	O
such	O
as	O
:	O
IMVironments	O
(	O
customizing	O
the	O
look	O
of	O
Instant	B-Application
Message	I-Application
windows	O
,	O
some	O
of	O
which	O
include	O
authorized	O
themes	O
of	O
various	O
cartoons	O
such	O
as	O
Garfield	B-Application
or	O
Dilbert	O
)	O
,	O
address-book	O
integration	O
and	O
Custom	O
Status	O
Messages	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
first	O
major	O
IM	O
client	B-Protocol
to	O
feature	O
BUZZing	O
and	O
music-status	O
.	O
</s>
<s>
A	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
was	O
shut	O
down	O
entirely	O
on	O
July	O
17	O
,	O
2018	O
,	O
replaced	O
by	O
a	O
new	O
service	O
titled	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
animated	O
GIF	O
feature	O
integrated	O
with	O
Tumblr	B-Application
,	O
also	O
owned	O
by	O
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
allowed	O
messages	O
to	O
be	O
unsent	O
,	O
deleting	O
them	O
from	O
both	O
the	O
sender	O
and	O
the	O
receiver	O
's	O
messaging	B-Protocol
page	O
.	O
</s>
<s>
The	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Chat	O
was	O
a	O
free	O
online	O
chat	O
room	O
service	O
provided	O
exclusively	O
for	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Chat	O
was	O
a	O
separate	O
vertical	O
on	O
Yahoo	B-Application
!	I-Application
</s>
<s>
In	O
its	O
original	O
form	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Soon	O
after	O
launch	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
's	O
Live	O
Chat	O
with	O
the	O
music	O
group	O
Hanson	O
on	O
July	O
21	O
,	O
1998	O
,	O
was	O
the	O
Internet	O
's	O
largest	O
live	O
event	O
to	O
date	O
.	O
</s>
<s>
Sadly	O
,	O
in	O
one	O
of	O
Yahoo	B-Application
's	O
poorer	O
decisions	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
On	O
March	O
9	O
,	O
1998	O
,	O
the	O
first	O
public	O
version	O
of	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Pager	O
was	O
released	O
,	O
with	O
Yahoo	B-Application
!	I-Application
</s>
<s>
In	O
June	O
2005	O
,	O
with	O
no	O
advance	O
warning	O
,	O
Yahoo	B-Application
disabled	O
users	O
 '	O
ability	O
to	O
create	O
their	O
own	O
chat	O
rooms	O
.	O
</s>
<s>
The	O
story	O
prompted	O
several	O
advertisers	O
,	O
including	O
Pepsi	O
and	O
Georgia-Pacific	O
,	O
to	O
pull	O
their	O
ads	O
from	O
Yahoo	B-Application
.	O
</s>
<s>
On	O
November	O
30	O
,	O
2012	O
,	O
Yahoo	B-Application
announced	O
that	O
among	O
other	O
changes	O
that	O
the	O
public	O
chat	O
rooms	O
would	O
be	O
discontinued	O
as	O
of	O
December	O
14	O
,	O
2012	O
.	O
quoting	O
"	O
This	O
will	O
enable	O
us	O
to	O
refocus	O
our	O
efforts	O
on	O
modernizing	O
our	O
core	O
Yahoo	B-Application
products	O
experiences	O
and	O
of	O
course	O
,	O
create	O
new	O
ones.	O
"	O
</s>
<s>
Until	O
the	O
chat	O
rooms	O
became	O
unavailable	O
on	O
December	O
14	O
,	O
2012	O
,	O
all	O
versions	O
of	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
could	O
access	O
Yahoo	B-Application
chat	I-Application
rooms	O
.	O
</s>
<s>
Yahoo	B-Application
has	O
since	O
closed	O
down	O
the	O
chat.yahoo.com	B-Application
site	O
(	O
first	O
having	O
it	O
redirect	O
visitors	O
to	O
a	O
section	O
of	O
the	O
Yahoo	B-Application
!	I-Application
</s>
<s>
As	O
of	O
January	O
2014	O
,	O
the	O
iOS	B-Application
version	O
supported	O
voice	O
calls	O
,	O
with	O
video	B-Application
calling	I-Application
on	O
some	O
devices	O
.	O
</s>
<s>
The	O
Android	B-Application
version	O
supported	O
"	O
voice	O
&	O
video	B-Application
calls	I-Application
(	O
beta	B-Language
)	O
"	O
.	O
</s>
<s>
From	O
September	O
2016	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
's	O
software	O
previously	O
allowed	O
users	O
with	O
newer	O
versions	O
(	O
8	O
through	O
10	O
)	O
to	O
use	O
webcams	O
.	O
</s>
<s>
The	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
Protocol	O
(	O
YMSG	B-Application
)	O
was	O
the	O
client	B-Protocol
's	O
underlying	O
network	O
protocol	O
.	O
</s>
<s>
It	O
provided	O
a	O
language	O
and	O
series	O
of	O
conventions	O
for	O
software	O
communicating	O
with	O
Yahoo	B-Application
!	I-Application
</s>
<s>
'	O
s	O
Instant	B-Application
Messaging	I-Application
service	O
.	O
</s>
<s>
In	O
essence	O
,	O
YMSG	B-Application
performed	O
the	O
same	O
role	O
for	O
Yahoo	B-Application
!	I-Application
</s>
<s>
'	O
s	O
IM	O
as	O
HTTP	B-Protocol
does	O
for	O
the	O
World	O
Wide	O
Web	O
.	O
</s>
<s>
Unlike	O
HTTP	B-Protocol
,	O
however	O
,	O
YMSG	B-Application
was	O
a	O
proprietary	B-Application
protocol	O
,	O
a	O
closed	O
standard	O
aligned	O
only	O
with	O
the	O
Yahoo	B-Application
!	I-Application
</s>
<s>
messaging	B-Protocol
service	O
.	O
</s>
<s>
Rival	O
messaging	B-Protocol
services	O
have	O
their	O
own	O
protocols	O
,	O
some	O
based	O
on	O
open	O
standards	O
,	O
others	O
proprietary	B-Application
,	O
each	O
effectively	O
fulfilling	O
the	O
same	O
role	O
with	O
different	O
mechanics	O
.	O
</s>
<s>
One	O
of	O
the	O
fundamental	O
tenets	O
of	O
instant	B-Application
messaging	I-Application
is	O
the	O
notion	O
that	O
users	O
can	O
see	O
when	O
someone	O
is	O
connected	O
to	O
the	O
network	O
—	O
known	O
in	O
the	O
industry	O
as	O
'	O
presence	O
 '	O
.	O
</s>
<s>
The	O
YMSG	B-Application
protocol	O
used	O
the	O
mechanics	O
of	O
a	O
standard	O
internet	O
connection	O
to	O
achieve	O
presence	O
—	O
the	O
same	O
connection	O
it	O
used	O
to	O
send	O
and	O
receive	O
data	O
.	O
</s>
<s>
In	O
order	O
for	O
each	O
user	O
to	O
remain	O
'	O
visible	O
 '	O
to	O
other	O
users	O
on	O
the	O
service	O
,	O
and	O
thereby	O
signaling	O
their	O
availability	O
,	O
their	O
Yahoo	B-Application
!	I-Application
</s>
<s>
IM	O
client	B-Protocol
software	I-Protocol
maintained	O
a	O
functional	O
,	O
open	O
,	O
network	O
connection	O
linking	O
the	O
client	B-Protocol
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
's	O
installation	O
process	O
automatically	O
installed	O
an	O
extra	O
uniform	B-Protocol
resource	I-Protocol
identifier	I-Protocol
(	O
URI	B-Protocol
)	O
scheme	O
handler	O
for	O
the	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
Protocol	O
into	O
some	O
web	O
browsers	O
,	O
so	O
that	O
URIs	B-Protocol
beginning	O
ymsgr	O
could	O
open	O
a	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
This	O
is	O
similar	O
in	O
function	O
to	O
the	O
mailto	O
URI	B-Protocol
scheme	O
,	O
which	O
creates	O
a	O
new	O
e-mail	O
message	O
using	O
the	O
system	O
's	O
default	O
mail	O
program	O
.	O
</s>
<s>
For	O
instance	O
,	O
a	O
web	O
page	O
might	O
include	O
a	O
link	O
like	O
the	O
following	O
in	O
its	O
HTML	O
source	O
to	O
open	O
a	O
window	O
for	O
sending	O
a	O
message	O
to	O
the	O
YIM	B-Application
user	O
exampleuser	O
:	O
</s>
<s>
On	O
October	O
13	O
,	O
2005	O
,	O
Yahoo	B-Application
and	O
Microsoft	O
announced	O
plans	O
to	O
introduce	O
interoperability	O
between	O
their	O
two	O
messengers	O
,	O
creating	O
the	O
second-largest	O
real-time	O
communications	O
service	O
userbase	O
worldwide	O
:	O
40	O
percent	O
of	O
all	O
users	O
.	O
</s>
<s>
The	O
announcement	O
came	O
after	O
years	O
of	O
third-party	O
interoperability	O
success	O
(	O
most	O
notably	O
,	O
Trillian	B-Protocol
and	O
Pidgin	B-Protocol
)	O
and	O
criticisms	O
that	O
the	O
major	O
real-time	O
communications	O
services	O
were	O
locking	O
their	O
networks	O
.	O
</s>
<s>
Interoperability	O
between	O
Yahoo	B-Application
and	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
was	O
launched	O
July	O
12	O
,	O
2006	O
.	O
</s>
<s>
This	O
allowed	O
Yahoo	B-Application
and	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
users	O
to	O
chat	O
to	O
each	O
other	O
without	O
the	O
need	O
to	O
create	O
an	O
account	O
on	O
the	O
other	O
service	O
,	O
provided	O
both	O
contacts	O
used	O
the	O
latest	O
versions	O
of	O
the	O
clients	O
.	O
</s>
<s>
As	O
of	O
December	O
14	O
,	O
2012	O
,	O
the	O
interoperability	O
between	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
and	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
ceased	O
to	O
exist	O
.	O
</s>
<s>
The	O
Live	B-Protocol
Messenger	I-Protocol
contacts	O
appeared	O
as	O
greyed	O
out	O
and	O
it	O
was	O
not	O
possible	O
to	O
send	O
instant	B-Application
messages	I-Application
to	O
them	O
.	O
</s>
<s>
It	O
requires	O
Java	B-Language
to	O
function	O
.	O
</s>
<s>
As	O
of	O
April	O
18	O
,	O
2014	O
,	O
games	O
were	O
removed	O
from	O
Yahoo	B-Application
!	I-Application
</s>
<s>
In	O
version	O
8.0	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
featured	O
the	O
ability	O
for	O
users	O
to	O
create	O
plug-ins	O
,	O
which	O
are	O
then	O
hosted	O
and	O
showcased	O
on	O
the	O
Yahoo	B-Application
chat	I-Application
room	O
.	O
</s>
<s>
Yahoo	B-Application
now	O
no	O
longer	O
provides	O
plugin	O
development	O
SDK	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
users	O
could	O
listen	O
to	O
free	O
and	O
paid	O
Internet	O
radio	O
services	O
,	O
using	O
the	O
defunct	O
Yahoo	B-Application
!	I-Application
</s>
<s>
As	O
of	O
August	O
2000	O
,	O
according	O
to	O
Media	O
Metrix	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
had	O
about	O
10.6	O
million	O
users	O
in	O
the	O
U.S.	O
,	O
about	O
the	O
same	O
as	O
MSN	B-Protocol
Messenger	I-Protocol
but	O
trailing	O
AOL	B-Protocol
Instant	I-Protocol
Messenger	I-Protocol
.	O
</s>
<s>
However	O
another	O
analyst	O
doubted	O
the	O
figures	O
for	O
Yahoo	B-Application
!	I-Application
</s>
<s>
and	O
MSN	B-Protocol
.	O
</s>
<s>
As	O
of	O
the	O
month	O
of	O
September	O
2001	O
,	O
over	O
five	O
billion	O
instant	B-Application
messages	I-Application
were	O
sent	O
on	O
the	O
network	O
,	O
up	O
115%	O
from	O
the	O
year	O
before	O
,	O
according	O
to	O
Media	O
Metrix	O
.	O
</s>
<s>
Another	O
study	O
in	O
August	O
2002	O
showed	O
that	O
it	O
had	O
a	O
16.7	O
percent	O
share	O
of	O
IM	O
work	O
and	O
home	O
subscribers	O
in	O
the	O
U.S.	O
,	O
compared	O
to	O
24.1	O
percent	O
for	O
MSN	B-Protocol
and	O
28.3	O
percent	O
for	O
AIM	O
.	O
</s>
<s>
In	O
April	O
2002	O
,	O
19.1	O
million	O
people	O
in	O
the	O
U.S.	O
used	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Another	O
study	O
from	O
Nielsen	O
Net	O
Ratings	O
showed	O
that	O
as	O
of	O
2002	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
was	O
the	O
dominant	O
instant	B-Application
messaging	I-Application
platform	O
among	O
commodity	O
traders	O
until	O
the	O
platform	O
was	O
discontinued	O
in	O
August	O
2016	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
Yahoo	B-Application
!	I-Application
</s>
<s>
As	O
of	O
March	O
27	O
,	O
2016	O
,	O
the	O
only	O
supported	O
clients	O
were	O
the	O
Android	B-Application
,	O
iOS	B-Application
and	O
web	O
browser	O
clients	O
.	O
</s>
<s>
The	O
previous	O
Windows	O
,	O
Mac	O
,	O
Unix	O
and	O
Solaris	B-Application
clients	O
were	O
not	O
supported	O
anymore	O
,	O
and	O
their	O
servers	O
began	O
shutting	O
down	O
on	O
August	O
5	O
,	O
2016	O
,	O
with	O
the	O
clients	O
no	O
longer	O
working	O
by	O
August	O
31	O
,	O
2016	O
.	O
</s>
<s>
As	O
of	O
2018	O
(	O
with	O
the	O
last	O
version	O
)	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
was	O
available	O
for	O
computers	O
as	O
a	O
web	O
service	O
,	O
including	O
both	O
a	O
messenger-only	O
site	O
and	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Apps	O
were	O
also	O
available	O
on	O
Android	B-Application
and	O
iOS	B-Application
.	O
</s>
<s>
Pidgin	B-Protocol
could	O
connect	O
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Mobile	O
versions	O
of	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
were	O
launched	O
originally	O
for	O
Palm	B-Operating_System
OS	I-Operating_System
and	O
Windows	B-Operating_System
CE	I-Operating_System
devices	O
.	O
</s>
<s>
In	O
a	O
deal	O
signed	O
March	O
2000	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
was	O
also	O
available	O
for	O
Verizon	B-Application
Wireless	I-Application
customers	O
,	O
through	O
a	O
deal	O
with	O
Yahoo	B-Application
!	I-Application
</s>
<s>
A	O
version	O
for	O
the	O
T-Mobile	B-Application
Sidekick	I-Application
II	I-Application
was	O
released	O
in	O
2004	O
.	O
</s>
<s>
This	O
was	O
to	O
be	O
followed	O
by	O
versions	O
for	O
Symbian	B-Operating_System
(	O
via	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Go	O
)	O
,	O
BlackBerry	B-Operating_System
,	O
and	O
then	O
for	O
iPhone	B-Device
in	O
April	O
2009	O
.	O
</s>
<s>
A	O
version	O
called	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
for	O
SMS	B-Device
also	O
existed	O
,	O
which	O
allowed	O
IM	O
via	O
SMS	B-Device
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Pager	O
launched	O
on	O
March	O
9	O
,	O
1998	O
,	O
an	O
instant	B-Application
messaging	I-Application
(	O
IM	O
)	O
client	B-Protocol
integrated	O
with	O
Yahoo	B-Application
!	I-Application
</s>
<s>
services	O
including	O
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
included	O
basic	O
messaging	B-Protocol
support	O
,	O
a	O
buddy	O
list	O
with	O
status	O
message	O
support	O
,	O
the	O
ability	O
to	O
block	O
other	O
users	O
,	O
alerts	O
when	O
a	O
buddies	O
came	O
online	O
,	O
and	O
notifications	O
when	O
a	O
new	O
Yahoo	B-Application
!	I-Application
</s>
<s>
In	O
2000	O
,	O
the	O
name	O
changed	O
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Version	O
5.0	O
,	O
released	O
November	O
2001	O
,	O
introduced	O
IMVironments	O
,	O
an	O
initiative	O
that	O
allowed	O
users	O
to	O
play	O
music	O
and	O
Flash	B-Operating_System
Video	I-Operating_System
clips	O
inside	O
the	O
IM	O
window	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Other	O
partnerships	O
also	O
made	O
IMVironments	O
for	O
the	O
Monsters	B-Application
,	I-Application
Inc	I-Application
.	I-Application
movie	O
,	O
the	O
Super	B-Application
Smash	I-Application
Bros	I-Application
.	I-Application
Melee	I-Application
video	O
game	O
,	O
and	O
the	O
Hello	O
Kitty	O
character	O
,	O
among	O
others	O
.	O
</s>
<s>
In	O
August	O
2002	O
with	O
the	O
release	O
of	O
version	O
5.5	O
,	O
the	O
resolution	O
for	O
video	B-Application
calling	I-Application
was	O
increased	O
to	O
a	O
possible	O
320x240	O
and	O
20	O
frames	O
per	O
second	O
(	O
up	O
from	O
160x120	O
and	O
1	O
frame	O
per	O
second	O
)	O
.	O
</s>
<s>
From	O
October	O
2002	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
offered	O
for	O
corporate	O
subscribers	O
a	O
more	O
secure	O
and	O
better	O
(	O
SSL	B-Protocol
)	O
encrypted	O
IM	O
client	B-Protocol
,	O
called	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
added	O
games	O
,	O
music	O
,	O
photos	O
,	O
and	O
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
also	O
debuted	O
Yahoo	B-Application
!	I-Application
</s>
<s>
With	O
the	O
release	O
of	O
version	O
7.0	O
in	O
August	O
2005	O
,	O
the	O
client	B-Protocol
was	O
now	O
renamed	O
to	O
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
had	O
several	O
new	O
features	O
such	O
as	O
VoIP	B-Application
,	O
voicemail	O
,	O
drag-and-drop	O
file	O
and	O
photo	O
sharing	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
was	O
seen	O
as	O
a	O
challenger	O
against	O
Skype	B-Application
.	O
</s>
<s>
On	O
October	O
12	O
,	O
2005	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
and	O
Microsoft	O
formed	O
an	O
alliance	O
in	O
which	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
and	O
MSN	B-Protocol
Messenger	I-Protocol
(	O
later	O
known	O
as	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
)	O
will	O
be	O
interconnected	O
,	O
allowing	O
users	O
of	O
both	O
communities	O
to	O
communicate	O
and	O
share	O
emoticons	O
and	O
buddy	O
lists	O
with	O
each	O
other	O
.	O
</s>
<s>
The	O
service	O
was	O
enabled	O
on	O
Yahoo	B-Application
!	I-Application
</s>
<s>
As	O
of	O
version	O
8.1	O
,	O
the	O
name	O
switched	O
back	O
to	O
just	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Beginning	O
in	O
2006	O
,	O
Yahoo	B-Application
made	O
known	O
its	O
intention	O
to	O
provide	O
a	O
web	O
interface	O
for	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
,	O
culminating	O
in	O
the	O
Gmail-like	O
web	O
archival	O
and	O
indexing	O
of	O
chat	O
conversations	O
through	O
Yahoo	B-Application
!	I-Application
</s>
<s>
However	O
,	O
while	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Mail	O
integrated	O
much	O
of	O
the	O
rudimentary	O
features	O
of	O
Messenger	O
beginning	O
in	O
2007	O
,	O
Yahoo	B-Application
did	O
not	O
succeed	O
initially	O
in	O
integrating	O
archival	O
of	O
chat	O
conversations	O
into	O
Mail	O
.	O
</s>
<s>
Instead	O
,	O
a	O
separate	O
Adobe	O
Flex-based	O
web	B-Application
messenger	I-Application
was	O
released	O
in	O
2007	O
with	O
archival	O
of	O
conversations	O
which	O
take	O
place	O
inside	O
the	O
web	B-Application
messenger	I-Application
itself	O
.	O
</s>
<s>
At	O
the	O
Consumer	O
Electronics	O
Show	O
in	O
January	O
2007	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
for	O
Vista	B-Application
was	O
introduced	O
,	O
which	O
is	O
a	O
version	O
designed	O
and	O
optimized	O
for	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
It	O
exploited	O
the	O
new	O
design	O
elements	O
of	O
Vista	B-Application
's	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
(	O
WPF	O
)	O
and	O
introduced	O
a	O
new	O
user	O
interface	O
and	O
features	O
.	O
</s>
<s>
The	O
application	O
was	O
in	O
a	O
preview	O
beta	B-Language
until	O
finally	O
released	O
for	O
download	O
on	O
December	O
6	O
,	O
2007	O
.	O
</s>
<s>
As	O
of	O
October	O
24	O
,	O
2008	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
for	O
Vista	B-Application
is	O
no	O
longer	O
available	O
.	O
</s>
<s>
In	O
May	O
2007	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
for	O
the	O
Web	O
was	O
launched	O
,	O
a	O
browser-based	O
client	B-Protocol
of	O
the	O
IM	O
service	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
It	O
allows	O
the	O
viewing	O
of	O
YouTube	B-General_Concept
videos	I-General_Concept
within	O
the	O
chat	O
window	O
,	O
and	O
integrates	O
with	O
other	O
Yahoo	B-Application
!	I-Application
</s>
<s>
services	O
such	O
as	O
Flickr	B-Algorithm
.	O
</s>
<s>
This	O
version	O
also	O
saw	O
the	O
release	O
of	O
Pingbox	O
,	O
which	O
embeds	O
on	O
a	O
blog	O
or	O
website	O
and	O
allows	O
visitors	O
to	O
send	O
IM	O
texts	O
anonymously	O
without	O
needing	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Version	O
10	O
,	O
released	O
November	O
2009	O
,	O
incorporates	O
many	O
bug	O
fixes	O
and	O
features	O
high-quality	O
video	B-Application
calling	I-Application
.	O
</s>
<s>
The	O
last	O
major	O
Windows	O
client	B-Protocol
release	O
,	O
version	O
11	O
in	O
2011	O
,	O
featured	O
integration	O
with	O
Facebook	B-Application
,	O
Twitter	B-Application
and	O
Zynga	O
,	O
allowing	O
chat	O
with	O
Facebook	B-Application
friends	O
and	O
playing	O
Zynga	O
games	O
within	O
.	O
</s>
<s>
It	O
also	O
archives	O
past	O
messages	O
on	O
an	O
online	O
server	O
which	O
is	O
accessible	O
through	O
the	O
client	B-Protocol
.	O
</s>
<s>
Version	O
11.5	O
(	O
released	O
November	O
2011	O
)	O
added	O
tabbed	O
IMs	B-Application
.	O
</s>
<s>
In	O
December	O
2015	O
,	O
an	O
all-new	O
,	O
rewritten	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Together	O
was	O
a	O
freeware	B-License
and	O
cross-platform	B-Operating_System
messaging	B-Protocol
service	O
,	O
developed	O
by	O
Yahoo	B-Application
!	I-Application
</s>
<s>
for	O
the	O
Android	B-Application
and	O
iOS	B-Application
mobile	O
platforms	O
.	O
</s>
<s>
The	O
software	O
was	O
introduced	O
in	O
beta	B-Language
on	O
May	O
8	O
,	O
2018	O
,	O
as	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Squirrel	O
to	O
replace	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
and	O
Verizon	B-Application
Media	O
's	O
AOL	B-Protocol
Instant	I-Protocol
Messenger	I-Protocol
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
The	O
app	O
was	O
compared	O
to	O
Slack	B-Protocol
.	O
</s>
<s>
Less	O
than	O
a	O
year	O
after	O
its	O
public	O
beta	B-Language
release	O
,	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
's	O
primary	O
solution	O
to	O
the	O
issue	O
involved	O
deleting	O
such	O
messages	O
and	O
placing	O
the	O
senders	O
on	O
an	O
Ignore	O
List	O
.	O
</s>
<s>
,	O
it	O
was	O
estimated	O
that	O
at	O
least	O
75%	O
of	O
all	O
users	O
who	O
used	O
Yahoo	B-Application
chat	I-Application
rooms	O
were	O
bots	O
.	O
</s>
<s>
Yahoo	B-Application
introduced	O
a	O
CAPTCHA	O
system	O
to	O
help	O
filter	O
out	O
bots	O
from	O
joining	O
chat	O
rooms	O
,	O
but	O
such	O
systems	O
generally	O
do	O
little	O
to	O
prevent	O
abuse	O
by	O
spammers	O
.	O
</s>
<s>
On	O
November	O
4	O
,	O
2014	O
,	O
the	O
Electronic	O
Frontier	O
Foundation	O
listed	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Messenger	O
on	O
its	O
"	O
Secure	O
Messaging	B-Protocol
Scorecard	O
"	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
the	O
source	O
code	O
was	O
not	O
open-source	B-Application
)	O
,	O
the	O
security	O
design	O
was	O
not	O
properly	O
documented	O
,	O
and	O
there	O
had	O
not	O
been	O
a	O
recent	O
independent	O
security	O
audit	O
.	O
</s>
<s>
The	O
British	O
intelligence	O
agency	O
Government	O
Communications	O
Headquarters	O
(	O
GCHQ	O
)	O
'	O
s	O
secret	O
mass	O
surveillance	O
program	O
Optic	B-Application
Nerve	I-Application
and	O
National	O
Security	O
Agency	O
(	O
NSA	O
)	O
were	O
reported	O
to	O
be	O
indiscriminately	O
collecting	O
still	O
images	O
from	O
Yahoo	B-Application
webcam	O
streams	O
from	O
millions	O
of	O
mostly	O
innocent	O
Yahoo	B-Application
webcam	O
users	O
from	O
2008	O
to	O
2010	O
,	O
among	O
other	O
things	O
creating	O
a	O
database	O
for	O
facial	O
recognition	O
for	O
future	O
use	O
.	O
</s>
<s>
Optic	B-Application
Nerve	I-Application
took	O
a	O
still	O
image	O
from	O
the	O
webcam	O
stream	O
every	O
5	O
minutes	O
.	O
</s>
<s>
In	O
September	O
2016	O
,	O
The	O
New	O
York	O
Times	O
reported	O
that	O
Yahoo	B-Application
's	O
security	O
team	O
,	O
led	O
by	O
Alex	O
Stamos	O
,	O
had	O
pressed	O
for	O
Yahoo	B-Application
to	O
adopt	O
end-to-end	O
encryption	O
sometime	O
between	O
2014	O
and	O
2015	O
,	O
but	O
this	O
had	O
been	O
resisted	O
by	O
Jeff	O
Bonforte	O
,	O
Yahoo	B-Application
's	O
senior	O
vice	O
president	O
,	O
"	O
because	O
it	O
would	O
have	O
hurt	O
Yahoo	B-Application
's	O
ability	O
to	O
index	O
and	O
search	O
message	O
data	O
"	O
.	O
</s>
