<s>
L4Linux	B-Application
is	O
a	O
variant	O
of	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
for	O
operating	B-General_Concept
systems	I-General_Concept
,	O
that	O
is	O
altered	O
to	O
the	O
extent	O
that	O
it	O
can	O
run	O
paravirtualized	O
on	O
an	O
L4	B-Operating_System
microkernel	I-Operating_System
,	O
where	O
the	O
L4Linux	B-Application
kernel	B-Operating_System
runs	O
a	O
service	O
.	O
</s>
<s>
L4Linux	B-Application
is	O
not	O
a	O
fork	B-Application
but	O
a	O
variant	O
and	O
is	O
binary	B-General_Concept
compatible	I-General_Concept
with	O
the	O
Linux	B-Application
x86	B-Operating_System
kernel	B-Operating_System
,	O
thus	O
it	O
can	O
replace	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
of	O
any	O
Linux	B-Application
distribution	I-Application
.	O
</s>
<s>
L4Linux	B-Application
is	O
being	O
developed	O
by	O
the	O
Dresden	O
Real-Time	B-General_Concept
Operating	B-General_Concept
System	I-General_Concept
Project	O
(	O
DROPS	O
)	O
to	O
allow	O
real-time	B-General_Concept
and	O
time-sharing	B-General_Concept
programs	O
to	O
run	O
on	O
a	O
computer	O
in	O
parallel	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
L4Linux	B-Application
also	O
allows	O
setting	O
up	O
a	O
virtualized	B-General_Concept
environment	O
vaguely	O
similar	O
to	O
Xen	B-Operating_System
or	O
Kernel-based	B-Application
Virtual	I-Application
Machine	I-Application
(	O
KVM	O
)	O
,	O
but	O
a	O
few	O
significant	O
differences	O
exist	O
between	O
the	O
intent	O
of	O
Xen	B-Operating_System
and	O
L4Linux	B-Application
.	O
</s>
<s>
L4Android	O
is	O
a	O
fork	B-Application
of	O
L4Linux	B-Application
which	O
encompasses	O
the	O
modifications	O
to	O
the	O
main-line	O
Linux	B-Operating_System
kernel	I-Operating_System
for	O
Android	B-Application
.	O
</s>
<s>
It	O
is	O
a	O
joint	O
project	O
of	O
the	O
operating	B-General_Concept
systems	I-General_Concept
group	O
of	O
the	O
Dresden	O
University	O
of	O
Technology	O
and	O
the	O
chair	O
for	O
Security	O
in	O
Telecommunications	O
of	O
the	O
Berlin	O
Institute	O
of	O
Technology	O
.	O
</s>
