<s>
Gadu-Gadu	B-Application
(	O
Polish	O
for	O
"	O
chit-chat	O
"	O
;	O
commonly	O
known	O
as	O
GG	O
or	O
gg	O
)	O
is	O
a	O
Polish	O
instant	B-Application
messaging	I-Application
client	B-Protocol
using	O
a	O
proprietary	O
protocol	O
.	O
</s>
<s>
Gadu-Gadu	B-Application
was	O
the	O
most	O
popular	O
IM	O
service	O
in	O
Poland	O
,	O
with	O
over	O
15	O
million	O
registered	O
accounts	O
and	O
approximately	O
6.5	O
million	O
users	O
online	O
daily	O
.	O
</s>
<s>
Gadu-Gadu	B-Application
'	O
s	O
casual	O
gaming	O
portal	O
had	O
some	O
500,000	O
active	O
users	O
at	O
the	O
end	O
of	O
March	O
2009	O
.	O
</s>
<s>
Gadu-Gadu	B-Application
is	O
financed	O
by	O
the	O
display	O
of	O
advertisements	O
.	O
</s>
<s>
The	O
developer	O
is	O
based	O
in	O
Warsaw	B-Application
,	O
Poland	O
and	O
the	O
company	O
is	O
wholly	O
owned	O
by	O
a	O
Polish	O
company	O
England.pl	O
.	O
</s>
<s>
Gadu-Gadu	B-Application
uses	O
its	O
own	O
proprietary	O
protocol	O
.	O
</s>
<s>
As	O
with	O
ICQ	B-Protocol
,	O
users	O
are	O
identified	O
by	O
unique	O
serial	O
numbers	O
.	O
</s>
<s>
Protocol	O
's	O
features	O
include	O
status	O
messages	O
,	O
file	O
sharing	O
,	O
and	O
VoIP	B-Application
.	O
</s>
<s>
Since	O
client	B-Protocol
version	O
6.0	O
,	O
an	O
experimental	O
secure	O
connection	O
mode	O
can	O
be	O
used	O
.	O
</s>
<s>
The	O
official	O
client	B-Protocol
provides	O
over	O
150	O
emoticons	B-Protocol
,	O
allows	O
grouping	O
contacts	O
,	O
sending	O
SMS	B-Device
and	O
integrates	O
with	O
other	O
services	O
ran	O
by	O
the	O
same	O
company	O
:	O
a	O
virtual	O
Internet	O
dial-up	O
,	O
a	O
social	O
networking	O
site	O
MojaGeneracja.pl	O
(	O
defunct	O
since	O
5	O
November	O
2012	O
)	O
and	O
an	O
internet	O
radio	O
Open.fm	O
.	O
</s>
<s>
Gadu-Gadu	B-Application
allows	O
its	O
users	O
to	O
add	O
personal	O
information	O
to	O
a	O
publicly	O
searchable	O
directory	O
.	O
</s>
<s>
Blip.pl	B-Application
(	O
or	O
just	O
Blip	O
)	O
was	O
a	O
Polish	O
social	O
networking	O
internet	O
service	O
,	O
founded	O
in	O
May	O
2007	O
and	O
currently	O
owned	O
by	O
Gadu-Gadu	B-Application
.	O
</s>
<s>
It	O
had	O
microblogging	B-Application
capability	O
.	O
</s>
<s>
Soon	O
after	O
being	O
established	O
,	O
it	O
was	O
purchased	O
by	O
Gadu-Gadu	B-Application
S.A	O
in	O
June	O
2007	O
.	O
</s>
<s>
During	O
this	O
period	O
,	O
users	O
could	O
choose	O
to	O
migrate	O
their	O
accounts	O
to	O
Wykop	O
,	O
which	O
hosts	O
a	O
similar	O
microblogging	B-Application
service	O
.	O
</s>
