<s>
An	O
Internet	B-Application
Go	I-Application
server	I-Application
is	O
a	O
server	O
that	O
allows	O
players	O
of	O
the	O
game	O
of	O
Go	O
to	O
play	O
against	O
opponents	O
online	O
.	O
</s>
<s>
The	O
first	O
Go	O
server	O
that	O
started	O
operating	O
is	O
the	O
Internet	B-Application
Go	I-Application
Server	I-Application
(	O
IGS	B-Application
)	O
,	O
which	O
began	O
service	O
in	O
1992	O
and	O
is	O
still	O
active	O
as	O
of	O
2021	O
.	O
</s>
<s>
IGS	B-Application
was	O
started	O
on	O
February	O
2	O
,	O
1992	O
,	O
by	O
Tim	O
Casey	O
,	O
Chris	O
Chisolm	O
,	O
and	O
Mark	O
Okada	O
,	O
working	O
at	O
the	O
University	O
of	O
New	O
Mexico	O
,	O
and	O
until	O
April	O
5	O
,	O
1993	O
,	O
continued	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
,	O
and	O
UC	O
San	O
Francisco	O
(	O
with	O
an	O
additional	O
server	O
at	O
The	O
Pasteur	O
Institute	O
,	O
France	O
)	O
;	O
it	O
was	O
the	O
first	O
server	O
of	O
its	O
kind	O
.	O
</s>
<s>
After	O
its	O
initial	O
inception	O
,	O
some	O
of	O
its	O
members	O
helped	O
to	O
improve	O
the	O
server	O
by	O
writing	O
software	O
with	O
a	O
graphical	O
interface	O
;	O
and	O
thus	O
IGS	B-Application
was	O
born	O
.	O
</s>
<s>
IGS	B-Application
hosts	O
up	O
to	O
3,000	O
players	O
at	O
a	O
time	O
,	O
depending	O
on	O
the	O
time	O
of	O
day	O
.	O
</s>
<s>
Leaving	O
the	O
UC	O
servers	O
in	O
1993	O
,	O
IGS	B-Application
continued	O
at	O
the	O
University	O
of	O
Pennsylvania	O
for	O
a	O
year	O
until	O
being	O
bought	O
by	O
the	O
Korean	O
ISP	O
nuri.net	O
in	O
1994	O
.	O
</s>
<s>
In	O
1995	O
,	O
the	O
Japanese	O
company	O
NKB	O
Inc.	O
,	O
a	O
partner	O
of	O
nuri.net,	O
acquired	O
IGS	B-Application
,	O
and	O
created	O
a	O
separate	O
department	O
,	O
named	O
"	O
Pandanet	B-Application
"	O
in	O
1996	O
,	O
with	O
Mark	O
Okada	O
as	O
manager	O
.	O
</s>
<s>
Pandanet	B-Application
has	O
managed	O
IGS	B-Application
ever	O
since	O
;	O
in	O
1998	O
renaming	O
it	O
to	O
"	O
IGS	B-Application
Pandanet	B-Application
,	O
"	O
which	O
was	O
shortened	O
to	O
"	O
Pandanet	B-Application
"	O
in	O
Japan	O
.	O
</s>
<s>
Around	O
2000	O
,	O
Kiseido	O
publishing	O
started	O
the	O
Kiseido	B-Application
Go	I-Application
Server	I-Application
(	O
KGS	B-Application
)	O
,	O
which	O
allowed	O
players	O
to	O
play	O
without	O
downloading	O
a	O
client	O
by	O
utilizing	O
a	O
Java	B-Application
applet	I-Application
in	O
the	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
IGS	B-Application
and	O
KGS	B-Application
are	O
currently	O
(	O
2014	O
)	O
the	O
most	O
popular	O
servers	O
for	O
the	O
English-speaking	O
audience	O
.	O
</s>
<s>
As	O
of	O
2014	O
,	O
Online	O
Go	O
Server	O
(	O
OGS	O
)	O
handles	O
both	O
real-time	O
and	O
turn-based	O
games	O
straight	O
from	O
one	O
's	O
web-browser	B-Application
.	O
</s>
