<s>
eXeem	B-Protocol
was	O
a	O
peer-to-peer	O
(	O
P2P	O
)	O
file	O
sharing	O
client	B-Protocol
using	O
the	O
BitTorrent	B-Protocol
protocol	I-Protocol
.	O
</s>
<s>
eXeem	B-Protocol
was	O
designed	O
to	O
replace	O
the	O
need	O
for	O
centralized	O
trackers	O
(	O
servers	O
which	O
co-ordinate	O
the	O
transfer	O
of	O
metadata	O
across	O
a	O
BitTorrent	B-Protocol
network	B-Architecture
)	O
.	O
</s>
<s>
It	O
largely	O
failed	O
to	O
achieve	O
this	O
goal	O
,	O
and	O
the	O
project	O
was	O
canceled	O
and	O
eXeem	B-Protocol
's	O
network	B-Architecture
was	O
shut	O
down	O
by	O
the	O
end	O
of	O
2005	O
.	O
</s>
<s>
eXeem	B-Protocol
was	O
written	O
in	O
C++	B-Language
using	O
the	O
open	B-License
source	I-License
libtorrent	B-Language
library	O
for	O
its	O
BitTorrent	B-Protocol
functionality	O
.	O
</s>
<s>
eXeem	B-Protocol
was	O
created	O
by	O
Swarm	O
Systems	O
Inc	O
.	O
which	O
is	O
located	O
in	O
Saint	O
Kitts	O
and	O
Nevis	O
.	O
</s>
<s>
The	O
company	O
employed	O
Andrej	O
Preston	O
,	O
the	O
founder	O
of	O
Suprnova.org,	O
as	O
its	O
spokesperson	O
and	O
public	O
face	O
of	O
eXeem	B-Protocol
.	O
</s>
<s>
Five	O
thousand	O
Suprnova.org	O
users	O
were	O
selected	O
to	O
take	O
part	O
in	O
a	O
private	O
beta	O
test	O
of	O
eXeem	B-Protocol
before	O
the	O
public	O
beta	O
was	O
released	O
on	O
January	O
21	O
,	O
2005	O
.	O
</s>
<s>
eXeem	B-Protocol
's	O
developers	O
expected	O
to	O
implement	O
the	O
following	O
features	O
:	O
</s>
<s>
Criticism	O
of	O
eXeem	B-Protocol
arose	O
soon	O
after	O
it	O
debuted	O
and	O
included	O
:	O
</s>
<s>
eXeem	B-Protocol
's	O
for-profit	O
operating	O
model	O
,	O
including	O
support	O
through	O
advertising	O
(	O
much	O
akin	O
to	O
Kazaa	B-Protocol
)	O
and	O
a	O
public	O
beta	O
that	O
included	O
HTML	O
ads	O
supported	O
by	O
Cydoor	B-Application
,	O
which	O
is	O
widely	O
considered	O
to	O
be	O
spyware	O
.	O
</s>
<s>
Ads-free	O
versions	O
called	O
eXeem	B-Protocol
Lite	I-Protocol
and	O
BIT	O
eXeem	B-Protocol
were	O
subsequently	O
released	O
,	O
and	O
eXeem	B-Protocol
later	O
replaced	O
Cydoor	B-Application
with	O
WhenU	O
from	O
version	O
0.21	O
onward	O
.	O
</s>
<s>
Closed	B-Application
source	I-Application
code	O
development	O
,	O
in	O
contrast	O
with	O
the	O
open-source	B-License
model	I-License
followed	O
by	O
the	O
most	O
popular	O
BitTorrent	B-Protocol
software	O
,	O
on	O
which	O
eXeem	B-Protocol
is	O
based	O
.	O
</s>
<s>
No	O
initial	O
Linux	B-Application
or	O
Macintosh	B-Application
versions	O
,	O
with	O
no	O
ability	O
to	O
allow	O
third	O
parties	O
to	O
port	O
the	O
code	O
beyond	O
Windows	B-Application
(	O
as	O
eXeem	B-Protocol
is	O
closed	B-Application
source	I-Application
)	O
.	O
</s>
<s>
The	O
eXeem	B-Protocol
network	B-Architecture
used	O
super-peers	O
that	O
were	O
used	O
to	O
track	O
torrents	B-Protocol
(	O
as	O
ordinary	O
BitTorrent	B-Protocol
trackers	O
)	O
.	O
</s>
<s>
These	O
super-peers	O
were	O
also	O
responsible	O
for	O
maintaining	O
file	O
lists	O
,	O
comments	O
and	O
ratings	O
for	O
part	O
of	O
the	O
files	O
in	O
the	O
network	B-Architecture
.	O
</s>
<s>
When	O
a	O
peer	O
that	O
was	O
tracking	O
a	O
torrent	B-Protocol
was	O
closed	O
or	O
went	O
down	O
,	O
a	O
new	O
peer	O
was	O
assigned	O
to	O
be	O
the	O
tracker	O
for	O
that	O
particular	O
torrent	B-Protocol
.	O
</s>
