<s>
The	O
Object	B-Application
REXX	I-Application
programming	O
language	O
is	O
an	O
object-oriented	B-Language
scripting	B-Language
language	I-Language
initially	O
produced	O
by	O
IBM	O
for	O
the	O
operating	O
system	O
OS/2	B-Application
and	O
later	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
It	O
is	O
a	O
follow-on	O
to	O
and	O
a	O
significant	O
extension	O
of	O
the	O
"	O
Classic	O
Rexx	B-Language
"	O
language	O
originally	O
created	O
for	O
the	O
Conversational	B-Operating_System
Monitor	I-Operating_System
System	I-Operating_System
(	O
CMS	O
)	O
component	O
of	O
the	O
operating	O
system	O
VM/SP	B-Application
Release	O
3	O
and	O
later	O
ported	O
to	O
Multiple	B-Application
Virtual	I-Application
Storage	I-Application
(	O
MVS	B-Application
)	O
,	O
OS/2	B-Application
and	O
PC	B-Operating_System
DOS	I-Operating_System
.	O
</s>
<s>
The	O
OS/2	B-Application
version	O
of	O
IBM	O
Object	B-Application
REXX	I-Application
includes	O
classes	O
to	O
support	O
IBM	B-Device
System	I-Device
Object	I-Device
Model	I-Device
(	O
SOM	B-Device
)	O
and	O
Workplace	B-Device
Shell	I-Device
(	O
WPS	O
)	O
.	O
</s>
<s>
It	O
is	O
also	O
included	O
in	O
ArcaOS	B-Device
.	O
</s>
<s>
On	O
October	O
12	O
,	O
2004	O
,	O
IBM	O
released	O
Object	B-Application
REXX	I-Application
as	O
free	B-License
and	I-License
open-source	I-License
software	I-License
,	O
giving	O
rise	O
to	O
Open	B-Application
Object	I-Application
Rexx	I-Application
(	O
ooREXX	B-Application
)	O
,	O
now	O
available	O
for	O
various	O
operating	O
systems	O
:	O
Linux	B-Application
,	O
Solaris	B-Application
,	O
Windows	B-Application
,	O
MacOS	B-Application
.	O
</s>
<s>
This	O
implementation	O
includes	O
a	O
Windows	B-Application
Script	O
Host	O
(	O
WSH	O
)	O
Scripting	B-Language
Engine	I-Language
for	O
Rexx	B-Language
.	O
</s>
<s>
The	O
released	O
sources	O
however	O
did	O
n't	O
include	O
the	O
classes	O
for	O
SOM	B-Device
and	O
Workplace	B-Device
Shell	I-Device
(	O
WPS	O
)	O
support	O
.	O
</s>
<s>
Object	B-Application
REXX	I-Application
supports	O
multiple	B-Application
inheritance	I-Application
via	O
the	O
use	O
of	O
mixin	B-Language
classes	I-Language
.	O
</s>
