<s>
Vigilo	B-Device
NMS	I-Device
(	O
Network	O
Monitoring	O
System	O
)	O
is	O
a	O
monitoring	O
software	O
capable	O
of	O
handling	O
large-scale	O
heterogeneous	O
systems	O
(	O
network	O
servers	O
,	O
software	O
)	O
thanks	O
to	O
a	O
distributed	O
and	O
modular	O
architecture	O
.	O
</s>
<s>
Built	O
around	O
Nagios	B-Application
,	O
Vigilo	B-Device
additionally	O
manages	O
metrology	O
,	O
mapping	O
,	O
correlation	O
and	O
reporting	O
.	O
</s>
<s>
It	O
is	O
released	O
as	O
an	O
open-source	B-Application
software	I-Application
,	O
published	O
under	O
the	O
GNU	B-License
GPL	I-License
license	I-License
.	O
</s>
<s>
Vigilo	B-Device
results	O
from	O
the	O
integration	O
of	O
several	O
open-source	B-Application
software	I-Application
:	O
</s>
<s>
Vigilo	B-Device
's	O
main	O
modules	O
are	O
:	O
</s>
<s>
Vigilo	B-Device
is	O
mainly	O
written	O
in	O
Python	B-Language
,	O
with	O
some	O
components	O
written	O
in	O
Perl	B-Language
.	O
</s>
<s>
Vigilo	B-Device
is	O
released	O
under	O
the	O
GNU	B-License
GPL	I-License
license	I-License
.	O
</s>
