<s>
Open	B-Application
Enterprise	I-Application
Server	I-Application
(	O
OES	B-Application
)	O
is	O
a	O
server	B-Application
operating	B-General_Concept
system	I-General_Concept
published	O
by	O
Novell	O
in	O
March	O
2005	O
to	O
succeed	O
their	O
NetWare	B-Operating_System
product	O
.	O
</s>
<s>
Unlike	O
NetWare	B-Operating_System
,	O
Novell	B-Application
OES	I-Application
is	O
a	O
Linux	B-Application
distribution	I-Application
—	O
specifically	O
,	O
one	O
based	O
on	O
SUSE	O
Linux	B-Application
Enterprise	B-Application
Server	I-Application
.	O
</s>
<s>
The	O
first	O
major	O
release	O
of	O
Open	B-Application
Enterprise	I-Application
Server	I-Application
(	O
OES	B-Application
1	O
)	O
could	O
run	O
either	O
with	O
a	O
Linux	B-Operating_System
kernel	I-Operating_System
(	O
with	O
a	O
NetWare	B-Operating_System
compatibility	B-General_Concept
layer	I-General_Concept
)	O
or	O
Novell	O
's	O
NetWare	B-Operating_System
kernel	I-Operating_System
(	O
with	O
a	O
Linux	B-Application
compatibility	B-General_Concept
layer	I-General_Concept
)	O
.	O
</s>
<s>
Novell	O
discontinued	O
the	O
NetWare	B-Operating_System
kernel	I-Operating_System
prior	O
to	O
the	O
release	O
of	O
OES	B-Application
2	O
,	O
but	O
NetWare	B-Operating_System
6.5	O
SP7	O
,	O
and	O
later	O
SP8	O
can	O
run	O
as	O
a	O
paravirtualized	O
guest	O
inside	O
the	O
Xen	B-Operating_System
hypervisor	I-Operating_System
(	O
Officially	O
supported	O
until	O
7	O
March	O
2012	O
,	O
Novell	O
self-supported	O
until	O
7	O
March	O
2015	O
)	O
.	O
</s>
<s>
Novell	O
released	O
OES	B-Application
1	O
,	O
the	O
first	O
version	O
of	O
OES	B-Application
,	O
on	O
25	O
March	O
2005	O
.	O
</s>
<s>
Since	O
some	O
users	O
wanted	O
backward	B-General_Concept
compatibility	I-General_Concept
with	O
NetWare	B-Operating_System
,	O
Novell	O
offered	O
two	O
installation	O
options	O
:	O
OES-NetWare	O
and	O
OES-Linux	O
.	O
</s>
<s>
These	O
are	O
two	O
different	O
operating	B-General_Concept
systems	I-General_Concept
with	O
different	O
kernels	B-Operating_System
and	O
different	O
userlands	O
.	O
</s>
<s>
OES-NetWare	O
is	O
NetWare	B-Operating_System
v6.5	O
equipped	O
with	O
NetWare	B-Application
Loadable	I-Application
Modules	I-Application
for	O
various	O
Novell	O
services	O
(	O
such	O
as	O
NetWare	B-Protocol
Core	I-Protocol
Protocol	I-Protocol
,	O
Novell	B-Application
eDirectory	I-Application
,	O
Novell	B-Application
Storage	I-Application
Services	I-Application
,	O
and	O
iPrint	B-Application
)	O
and	O
open-source	B-Application
software	I-Application
(	O
such	O
as	O
OpenSSH	B-Language
,	O
Apache	B-Language
Tomcat	I-Language
,	O
and	O
the	O
Apache	B-Application
HTTP	I-Application
Server	I-Application
)	O
.	O
</s>
<s>
OES-Linux	O
is	O
based	O
on	O
the	O
SUSE	O
Linux	B-Application
Enterprise	B-Application
Server	I-Application
(	O
SLES	O
)	O
with	O
added	O
NetWare	B-Operating_System
services	O
ported	O
to	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
:	O
e.g.	O
</s>
<s>
the	O
NetWare	B-Protocol
Core	I-Protocol
Protocol	I-Protocol
,	O
Novell	B-Application
eDirectory	I-Application
,	O
Novell	B-Application
Storage	I-Application
Services	I-Application
,	O
and	O
iPrint	B-Application
.	O
</s>
<s>
Novell	O
released	O
OES	B-Application
2	O
,	O
the	O
second	O
version	O
of	O
OES	B-Application
,	O
on	O
12	O
October	O
2007	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
SLES-Linux-kernel-only	O
OES	B-Application
,	O
but	O
it	O
retained	O
the	O
OES-NetWare	O
operating	B-General_Concept
system	I-General_Concept
option	O
,	O
as	O
NetWare	B-Operating_System
6.5	O
SP7	O
can	O
run	O
as	O
a	O
paravirtualized	O
guest	O
inside	O
the	O
Xen	B-Operating_System
hypervisor	I-Operating_System
.	O
</s>
<s>
The	O
SLES	O
base	O
of	O
the	O
OES	B-Application
2	O
was	O
later	O
updated	O
to	O
SLES	O
10	O
SP1	O
.	O
</s>
<s>
Features	O
introduced	O
in	O
OES	B-Application
2	O
include	O
:	O
</s>
<s>
See	O
also	O
(	O
based	O
on	O
different	O
OES	B-Application
editions	O
)	O
:	O
</s>
<s>
OES	B-Application
11	O
was	O
released	O
on	O
12	O
December	O
2011	O
based	O
on	O
SLES	O
11	O
SP1	O
64-bit	B-Device
(	O
From	O
OES	B-Application
2	O
no	O
NetWare	B-Operating_System
kernel	I-Operating_System
any	O
more	O
)	O
.	O
</s>
<s>
This	O
is	O
the	O
first	O
version	O
of	O
OES	B-Application
to	O
be	O
64-bit	B-Device
(	O
x86_64	O
)	O
only	O
.	O
</s>
<s>
NetWare	B-Operating_System
6.5	O
SP8	O
was	O
still	O
possible	O
to	O
run	O
as	O
a	O
32-bit	O
only	O
paravirtualized	O
guest	O
inside	O
the	O
Xen	B-Operating_System
hypervisor	I-Operating_System
.	O
</s>
<s>
Novell	O
released	O
a	O
service	O
pack	O
,	O
OES	B-Application
11	O
SP1	O
,	O
on	O
28	O
August	O
2012	O
.	O
</s>
<s>
Novell	O
released	O
a	O
service	O
pack	O
,	O
OES	B-Application
11	O
SP2	O
,	O
on	O
28	O
January	O
2014	O
.	O
</s>
<s>
Novell	O
released	O
a	O
service	O
pack	O
,	O
OES	B-Application
11	O
SP3	O
,	O
on	O
26	O
July	O
2016	O
.	O
</s>
<s>
OES	B-Application
2015	O
was	O
released	O
on	O
31	O
August	O
2015	O
,	O
added	O
new	O
features	O
and	O
improved	O
performance	O
.	O
</s>
<s>
OES	B-Application
2015	O
SP1	O
was	O
released	O
on	O
14	O
June	O
2016	O
.	O
</s>
<s>
OES	B-Application
2018	O
was	O
released	O
on	O
28	O
November	O
2017	O
,	O
based	O
on	O
SLES	O
12	O
SP2	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP1	O
was	O
released	O
on	O
7	O
February	O
2019	O
,	O
based	O
on	O
SLES	O
12	O
SP3	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP2	O
was	O
released	O
on	O
5	O
May	O
2020	O
,	O
based	O
on	O
SLES	O
12	O
SP5	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP3	O
was	O
released	O
on	O
15	O
Jul	O
2021	O
,	O
based	O
on	O
SLES	O
12	O
SP5	O
.	O
</s>
<s>
OES	B-Application
,	O
released	O
on	O
25	O
March	O
2005	O
,	O
based	O
on	O
NetWare	B-Operating_System
6.5	O
SP3	O
and	O
SLES	O
9	O
SP1	O
.	O
</s>
<s>
OES	B-Application
SP1	O
,	O
released	O
in	O
September	O
2005	O
,	O
was	O
based	O
on	O
NetWare	B-Operating_System
6.5	O
SP4	O
and	O
SLES	O
9	O
SP2	O
.	O
</s>
<s>
OES	B-Application
SP2	O
,	O
released	O
in	O
January	O
2006	O
,	O
was	O
based	O
on	O
NetWare	B-Operating_System
6.5	O
SP5	O
and	O
SLES	O
9	O
SP3	O
.	O
</s>
<s>
OES	B-Application
2	O
,	O
released	O
on	O
12	O
October	O
2007	O
based	O
on	O
NetWare	B-Operating_System
6.5	O
SP7	O
and	O
SLES	O
10	O
SP1	O
.	O
</s>
<s>
OES	B-Application
2	O
SP1	O
,	O
released	O
on	O
1	O
December	O
2008	O
,	O
based	O
on	O
NetWare	B-Operating_System
6.5	O
SP8	O
and	O
SLES	O
10	O
SP2	O
.	O
</s>
<s>
OES	B-Application
2	O
SP2	O
was	O
released	O
on	O
11	O
November	O
2009	O
,	O
based	O
on	O
SLES	O
10	O
SP3	O
.	O
</s>
<s>
OES	B-Application
2	O
SP3	O
was	O
released	O
on	O
7	O
November	O
2014	O
,	O
based	O
on	O
SLES	O
10	O
SP3	O
,	O
SLES	O
10	O
SP4	O
(	O
as	O
of	O
April	O
15	O
,	O
2011	O
)	O
.	O
</s>
<s>
OES	B-Application
11	O
was	O
released	O
on	O
12	O
December	O
2011	O
,	O
based	O
on	O
SLES	O
11	O
SP1	O
(	O
64-bit	B-Device
only	O
)	O
.	O
</s>
<s>
OES	B-Application
11	O
SP1	O
was	O
released	O
on	O
28	O
August	O
2012	O
,	O
based	O
on	O
SLES	O
11	O
SP2	O
.	O
</s>
<s>
OES	B-Application
11	O
SP2	O
was	O
released	O
on	O
28	O
January	O
2014	O
,	O
based	O
on	O
SLES	O
11	O
SP3	O
.	O
</s>
<s>
OES	B-Application
11	O
SP3	O
was	O
released	O
on	O
26	O
July	O
2016	O
,	O
based	O
on	O
SLES	O
11	O
SP4	O
.	O
</s>
<s>
OES	B-Application
2015	O
was	O
released	O
on	O
31	O
August	O
2015.	O
,	O
based	O
on	O
SLES	O
11	O
SP3	O
.	O
</s>
<s>
OES	B-Application
2015	O
SP1	O
was	O
released	O
on	O
14	O
June	O
2016	O
,	O
SLES	O
11	O
SP4	O
.	O
</s>
<s>
OES	B-Application
2018	O
was	O
released	O
on	O
28	O
November	O
2017	O
,	O
based	O
on	O
SLES	O
12	O
SP2	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP1	O
was	O
released	O
on	O
7	O
February	O
2019	O
,	O
based	O
on	O
SLES	O
12	O
SP3	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP2	O
was	O
released	O
on	O
5	O
May	O
2020	O
,	O
based	O
on	O
SLES	O
12	O
SP5	O
.	O
</s>
<s>
OES	B-Application
2018	O
SP3	O
was	O
released	O
on	O
15	O
Jul	O
2021	O
,	O
based	O
on	O
SLES	O
12	O
SP5	O
.	O
</s>
<s>
OES	B-Application
2023	O
was	O
released	O
on	O
13	O
October	O
2022	O
,	O
based	O
on	O
SLES	O
15	O
SP4	O
.	O
</s>
