<s>
The	O
F	O
Virtual	B-Application
Window	I-Application
Manager	I-Application
is	O
a	O
virtual	B-Application
window	I-Application
manager	I-Application
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
<s>
Originally	O
a	O
twm	B-Language
derivative	O
,	O
FVWM	B-Device
has	O
evolved	O
into	O
a	O
powerful	O
and	O
highly	O
configurable	O
environment	O
for	O
Unix-like	B-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
In	O
1993	O
,	O
during	O
his	O
work	O
analyzing	O
acoustic	O
signatures	O
for	O
the	O
United	O
States	O
Department	O
of	O
Defense	O
,	O
Robert	O
Nation	O
began	O
hacking	O
twm	B-Language
with	O
the	O
intent	O
of	O
simultaneously	O
reducing	O
memory	O
usage	O
and	O
adding	O
support	O
for	O
virtual	B-Application
desktops	I-Application
.	O
</s>
<s>
Already	O
known	O
for	O
his	O
rxvt	B-Application
terminal	B-Application
emulator	I-Application
,	O
Nation	O
worked	O
on	O
reducing	O
the	O
memory	O
consumption	O
of	O
his	O
new	O
window	B-Application
manager	I-Application
.	O
</s>
<s>
Deciding	O
to	O
test	O
FVWM	B-Device
's	O
reception	O
,	O
on	O
June	O
1	O
,	O
1993	O
,	O
he	O
bundled	O
it	O
with	O
a	O
rxvt	B-Application
release	O
.	O
</s>
<s>
In	O
1994	O
Rob	O
Nation	O
stopped	O
developing	O
FVWM	B-Device
and	O
made	O
Charles	O
Hines	O
the	O
maintainer	O
.	O
</s>
<s>
Rob	O
Nation	O
's	O
last	O
release	O
of	O
FVWM	B-Device
was	O
fvwm-1.24r	O
.	O
</s>
<s>
The	O
post-Rob	O
Nation	O
version	O
of	O
FVWM	B-Device
uses	O
a	O
different	O
configuration	O
file	O
format	O
and	O
has	O
a	O
significantly	O
different	O
architecture	O
.	O
</s>
<s>
Many	O
Linux	B-Application
distributions	O
,	O
as	O
a	O
result	O
,	O
distributed	O
both	O
fvwm-1.24r	O
and	O
later	O
releases	O
of	O
FVWM	B-Device
as	O
separate	O
programs	O
.	O
</s>
<s>
,	O
fvwm-1.24r	O
still	O
compiles	O
and	O
runs	O
on	O
a	O
modern	O
Linux	B-Application
system	O
without	O
any	O
problems	O
.	O
</s>
<s>
A	O
small	O
number	O
of	O
users	O
continue	O
to	O
use	O
the	O
older	O
FVWM	B-Device
release	O
.	O
</s>
<s>
In	O
late	O
1998	O
the	O
office	O
of	O
FVWM	B-Device
maintainer	O
was	O
abolished	O
and	O
further	O
development	O
has	O
been	O
conducted	O
by	O
a	O
group	O
of	O
volunteers	O
.	O
</s>
<s>
Many	O
developers	O
have	O
based	O
their	O
own	O
projects	O
on	O
FVWM	B-Device
in	O
order	O
to	O
benefit	O
from	O
the	O
years	O
of	O
refinement	O
and	O
development	O
.	O
</s>
<s>
Many	O
of	O
the	O
popular	O
window	B-Application
managers	I-Application
in	O
use	O
today	O
are	O
related	O
to	O
FVWM	B-Device
:	O
Afterstep	B-Language
,	O
Xfce	B-Language
,	O
Enlightenment	B-Application
,	O
Metisse	B-Device
and	O
many	O
more	O
.	O
</s>
<s>
Originally	O
,	O
FVWM	B-Device
was	O
the	O
Feeble	O
Virtual	B-Application
Window	I-Application
Manager	I-Application
,	O
which	O
was	O
clearly	O
stated	O
by	O
Robert	O
Nation	O
in	O
a	O
1997	O
Linux	B-Application
Journal	O
interview	O
with	O
him	O
,	O
who	O
also	O
claimed	O
the	O
name	O
had	O
been	O
chosen	O
because	O
original	O
releases	O
had	O
almost	O
no	O
user	O
selectable	O
features	O
,	O
so	O
it	O
really	O
was	O
feeble	O
.	O
</s>
<s>
When	O
Google	B-Application
published	O
the	O
old	O
news	O
group	O
archives	O
acquired	O
from	O
DejaNews	B-Application
,	O
the	O
original	O
meaning	O
was	O
re-discovered	O
.	O
</s>
<s>
However	O
,	O
when	O
Chuck	O
Hine	O
was	O
maintaining	O
the	O
official	O
FVWM	B-Device
Frequently	O
Asked	O
Questions	O
,	O
Chuck	O
had	O
never	O
agreed	O
with	O
the	O
'	O
feeble	O
 '	O
explanation	O
,	O
and	O
added	O
alternate	O
possible	O
meanings	O
of	O
F	O
to	O
the	O
FAQ	O
,	O
with	O
many	O
entries	O
coming	O
from	O
mailing	O
list	O
messages	O
.	O
</s>
<s>
This	O
is	O
a	O
partial	O
list	O
based	O
on	O
the	O
documentation	O
distributed	O
with	O
FVWM	B-Device
.	O
</s>
<s>
These	O
are	O
not	O
rigid	O
features	O
,	O
FVWM	B-Device
does	O
not	O
dictate	O
how	O
the	O
user	O
's	O
desktop	O
should	O
work	O
or	O
look	O
like	O
but	O
provides	O
the	O
mechanisms	O
to	O
configure	O
the	O
desktop	O
to	O
work	O
,	O
look	O
and	O
behave	O
the	O
way	O
the	O
user	O
wants	O
it	O
to	O
.	O
</s>
<s>
Supports	O
any	O
number	O
of	O
virtual	B-Application
desktops	I-Application
,	O
each	O
divided	O
into	O
multiple	O
pages	O
.	O
</s>
<s>
Full	O
EWMH	B-Application
,	O
ICCCM-2	O
and	O
GNOME	B-Application
Hints	O
support	O
.	O
</s>
<s>
Xft2	O
font	O
support	O
with	O
anti-aliasing	B-Algorithm
,	O
drop	O
shadows	O
of	O
any	O
size	O
,	O
at	O
any	O
offset	O
and	O
at	O
any	O
direction	O
,	O
text	O
rotation	O
.	O
</s>
<s>
Full	O
PNG	O
Support	O
,	O
including	O
alpha	B-Algorithm
blending	I-Algorithm
.	O
</s>
<s>
Perl	B-Language
programming	I-Language
library	O
for	O
extending	O
FVWM	B-Device
using	O
Perl	B-Language
,	O
scripting	O
and	O
pre-processing	O
of	O
configuration	O
files	O
.	O
</s>
<s>
Xinerama	B-Device
extension	O
support	O
to	O
use	O
more	O
than	O
one	O
monitor	O
.	O
</s>
