<s>
Xitami	B-Application
is	O
a	O
Web	O
and	O
FTP	B-Protocol
server	O
,	O
originally	O
developed	O
by	O
iMatix	B-Application
Corporation	O
as	O
a	O
free	O
,	O
open-source	B-Application
product	O
from	O
1996	O
to	O
2000	O
.	O
</s>
<s>
It	O
also	O
had	O
a	O
web	O
interface	O
to	O
configure	O
the	O
web/FTP	O
server	O
.	O
</s>
<s>
In	O
2009	O
,	O
iMatix	B-Application
launched	O
a	O
new	O
version	O
of	O
Xitami	B-Application
,	O
called	O
X5	O
(	O
Xitami/5	O
)	O
.	O
</s>
<s>
iMatix	B-Application
started	O
the	O
original	O
Xitami	B-Application
server	O
in	O
1996	O
as	O
a	O
demonstration	O
of	O
its	O
"	O
SMT	O
"	O
multithreading	O
technology	O
for	O
building	O
protocol	O
servers	O
.	O
</s>
<s>
The	O
name	O
was	O
chosen	O
at	O
the	O
last	O
minute	O
when	O
the	O
developers	O
realized	O
that	O
their	O
original	O
choice	O
(	O
"	O
Cosmos	O
"	O
)	O
had	O
already	O
been	O
taken	O
by	O
another	O
web	B-Application
server	I-Application
that	O
no	O
longer	O
exists	O
.	O
</s>
<s>
"	O
Xitami	B-Application
"	O
is	O
"	O
iMatix	B-Application
"	O
spelled	O
backwards	O
.	O
</s>
<s>
Xitami	B-Application
was	O
featured	O
in	O
an	O
April	O
1997	O
article	O
in	O
Dr.	O
Dobb	O
's	O
Journal	O
.	O
</s>
<s>
The	O
web	B-Application
server	I-Application
attracted	O
people	O
looking	O
for	O
a	O
fast	O
but	O
simple	O
web/FTP	O
server	O
,	O
mainly	O
on	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Xitami	B-Application
was	O
designed	O
to	O
be	O
portable	O
,	O
and	O
was	O
ported	O
to	O
Windows	B-Application
,	O
Linux	B-Application
and	O
other	O
Unices	B-Operating_System
,	O
OpenVMS	B-Operating_System
,	O
BeOS	B-Application
,	O
and	O
OS/2	B-Application
.	O
</s>
<s>
In	O
1999	O
,	O
the	O
Apache	O
web	B-Application
server	I-Application
adopted	O
a	O
similar	O
approach	O
to	O
portability	O
for	O
Apache2	O
,	O
building	O
the	O
Apache	B-Language
Portable	I-Language
Runtime	I-Language
(	O
APR	B-Language
)	O
.	O
</s>
<s>
The	O
Xitami	B-Application
team	O
continued	O
to	O
add	O
features	O
until	O
mid-2000	O
when	O
development	O
of	O
the	O
server	O
stopped	O
except	O
for	O
security	O
updates	O
.	O
</s>
<s>
In	O
2008	O
multiple	O
printf	B-Language
vulnerabilities	O
were	O
reported	O
in	O
the	O
final	O
release	O
of	O
Xitami/2.5	O
.	O
</s>
<s>
In	O
January	O
2009	O
iMatix	B-Application
announced	O
the	O
start	O
of	O
a	O
new	O
Xitami	B-Application
project	O
,	O
version	O
5	O
,	O
called	O
X5	O
.	O
</s>
<s>
This	O
uses	O
the	O
latest	O
generation	O
of	O
iMatix	B-Application
's	O
multithreading	O
technology	O
(	O
Base2	O
)	O
,	O
making	O
Xitami	B-Application
scalable	O
to	O
multiple	O
cores	O
,	O
while	O
remaining	O
small	O
,	O
and	O
simple	O
.	O
</s>
<s>
iMatix	B-Application
has	O
stated	O
that	O
it	O
is	O
"	O
designed	O
to	O
handle	O
thousands	O
of	O
connections	O
without	O
difficulty	O
"	O
which	O
makes	O
it	O
ready	O
for	O
long	O
polling	O
,	O
in	O
which	O
client	O
connections	O
remain	O
open	O
for	O
extended	O
durations	O
.	O
</s>
<s>
Windows	B-Application
binaries	O
for	O
X5	O
were	O
released	O
in	O
February	O
2009	O
and	O
X5	O
was	O
used	O
for	O
the	O
first	O
time	O
to	O
run	O
the	O
iMatix	B-Application
website	O
.	O
</s>
<s>
X5	O
shares	O
the	O
same	O
technical	O
framework	O
as	O
iMatix	B-Application
's	O
message	O
service	O
.	O
</s>
<s>
X5	O
is	O
written	O
in	O
ANSI	O
C99	B-Language
,	O
using	O
a	O
meta-programming	O
approach	O
called	O
"	O
Model	O
Oriented	O
Programming	O
"	O
.	O
</s>
<s>
X5	O
uses	O
APR	B-Language
in	O
place	O
of	O
SFL	O
,	O
and	O
has	O
been	O
run	O
on	O
Windows	B-Application
,	O
Linux	B-Application
,	O
AIX	B-Application
,	O
Solaris	B-Application
,	O
and	O
OpenVMS	B-Operating_System
.	O
</s>
