<s>
In	O
Unix	B-Application
computing	O
,	O
CTWM	B-Device
(	O
Claude	O
's	O
Tab	B-Language
Window	I-Language
Manager	I-Language
)	O
is	O
a	O
stacking	B-Device
window	I-Device
manager	I-Device
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
in	O
the	O
twm	B-Language
family	O
of	O
window	O
managers	O
.	O
</s>
<s>
It	O
was	O
created	O
in	O
1992	O
by	O
Claude	O
Lecommandeur	O
from	O
the	O
source	O
code	O
for	O
twm	B-Language
,	O
which	O
he	O
extended	O
to	O
allow	O
for	O
virtual	B-Application
desktops	I-Application
(	O
"	O
workspaces	B-Application
"	O
in	O
CTWM	B-Device
's	O
terminology	O
.	O
)	O
</s>
<s>
Features	O
of	O
the	O
CTWM	B-Device
window	B-Application
manager	I-Application
include	O
:	O
</s>
<s>
Backwards-compatibility	O
with	O
twm	B-Language
.	O
</s>
