<s>
The	O
Ultrix	B-Device
Window	I-Device
Manager	I-Device
(	O
uwm	B-Device
)	O
is	O
a	O
historic	O
standard	O
window	B-Application
manager	I-Application
software	O
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
from	O
X11R1	O
through	O
X11R3	O
releases	O
.	O
</s>
<s>
In	O
fact	O
,	O
it	O
was	O
the	O
only	O
X11-compatible	O
window	B-Application
manager	I-Application
as	O
of	O
X11R1	O
.	O
</s>
<s>
The	O
Ultrix	B-Device
Window	I-Device
Manager	I-Device
was	O
developed	O
by	O
the	O
Digital	O
Equipment	O
Corporation	O
for	O
its	O
Ultrix	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Shortly	O
thereafter	O
,	O
it	O
became	O
included	O
as	O
part	O
of	O
the	O
base	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
distribution	O
,	O
beginning	O
with	O
X10R3	O
.	O
</s>
<s>
Initially	O
,	O
it	O
was	O
distributed	O
alongside	O
two	O
other	O
window	B-Application
managers	I-Application
(	O
xwm	B-Application
and	O
xnwm	O
)	O
.	O
</s>
<s>
In	O
1986	O
,	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
switched	O
to	O
version	O
11	O
of	O
the	O
protocol	O
.	O
</s>
<s>
Only	O
uwm	B-Device
was	O
ported	O
,	O
so	O
it	O
became	O
the	O
only	O
window	B-Application
manager	I-Application
for	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
until	O
X11R4	B-Operating_System
release	O
,	O
where	O
it	O
was	O
replaced	O
by	O
twm	B-Language
.	O
</s>
<s>
Uwm	B-Device
has	O
never	O
been	O
maintained	O
since	O
.	O
</s>
<s>
Unlike	O
more	O
recent	O
window	B-Application
managers	I-Application
,	O
uwm	B-Device
is	O
not	O
re-parenting	B-Device
,	O
and	O
does	O
not	O
place	O
frames	O
or	O
title	O
bars	O
on	O
windows	O
.	O
</s>
<s>
Instead	O
,	O
all	O
window	B-Application
management	I-Application
functionality	O
is	O
accessed	O
either	O
by	O
clicking	O
on	O
the	O
root	O
window	O
to	O
bring	O
up	O
a	O
menu	O
or	O
by	O
holding	O
down	O
the	O
Meta	B-Device
key	I-Device
while	O
clicking	O
or	O
dragging	O
within	O
windows	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
configure	O
the	O
key	O
and	O
mouse	O
button	O
bindings	O
and	O
the	O
contents	O
of	O
the	O
menus	O
by	O
using	O
a	O
configuration	O
file	O
,	O
a	O
feature	O
inherited	O
by	O
many	O
later	O
window	B-Application
managers	I-Application
.	O
</s>
<s>
Uwm	B-Device
does	O
not	O
provide	O
ICCCM	B-Operating_System
compatibility	O
or	O
multiple	O
screen	O
support	O
.	O
</s>
<s>
Descendants	O
of	O
uwm	B-Device
include	O
awm	B-Device
and	O
Tekwm	O
(	O
the	O
Tektronix	O
Window	B-Application
Manager	I-Application
)	O
,	O
which	O
also	O
are	O
currently	O
not	O
maintained	O
.	O
</s>
