<s>
Matchbox	B-Device
is	O
a	O
free	B-Application
and	O
open	B-Application
source	I-Application
window	B-Application
manager	I-Application
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
<s>
It	O
is	O
mainly	O
intended	O
for	O
embedded	B-Architecture
systems	I-Architecture
and	O
differs	O
from	O
most	O
other	O
window	O
managers	O
in	O
that	O
it	O
only	O
shows	O
one	O
window	O
at	O
a	O
time	O
.	O
</s>
<s>
It	O
is	O
used	O
by	O
Maemo	B-Operating_System
on	O
Nokia	B-Device
Internet	I-Device
Tablets	I-Device
,	O
the	O
Neo	B-Application
1973	I-Application
smartphone	O
based	O
on	O
Openmoko	B-Application
,	O
the	O
handheld	O
data	O
acquisition	O
device	O
for	O
science	O
education	O
,	O
as	O
well	O
as	O
on	O
the	O
XO-1	B-Application
of	O
the	O
One	O
Laptop	O
Per	O
Child	O
Project	O
.	O
</s>
<s>
before	O
being	O
replaced	O
by	O
Metacity	B-Language
.	O
</s>
<s>
Matchbox	B-Device
Window	B-Application
Manager	I-Application
II	O
is	O
a	O
complete	O
rewrite	O
of	O
the	O
original	O
m-w-m	O
.	O
</s>
