<s>
An	O
NRG	B-General_Concept
file	O
is	O
a	O
proprietary	O
optical	B-General_Concept
disc	I-General_Concept
image	I-General_Concept
file	O
format	O
originally	O
created	O
by	O
Nero	O
AG	O
for	O
the	O
Nero	B-Application
Burning	I-Application
ROM	I-Application
utility	O
.	O
</s>
<s>
It	O
is	O
used	O
to	O
store	O
disc	B-Application
images	I-Application
.	O
</s>
<s>
Other	O
than	O
Nero	B-Application
Burning	I-Application
ROM	I-Application
,	O
however	O
,	O
a	B-Application
variety	I-Application
of	I-Application
software	I-Application
titles	I-Application
can	I-Application
use	I-Application
these	I-Application
image	I-Application
files	I-Application
.	O
</s>
<s>
For	O
example	O
,	O
Alcohol	B-Application
120%	I-Application
,	O
or	O
Daemon	B-Application
Tools	I-Application
can	O
mount	B-Application
NRG	B-General_Concept
files	O
onto	O
virtual	O
drives	O
for	O
reading	O
.	O
</s>
<s>
Contrary	O
to	O
popular	O
belief	O
,	O
NRG	B-General_Concept
files	O
are	O
not	O
ISO	B-General_Concept
images	I-General_Concept
with	O
a	O
.nrg	B-General_Concept
extension	O
and	O
a	O
header	O
attached	O
.	O
</s>
<s>
They	O
can	O
store	O
audio	O
tracks	O
for	O
Audio	O
CDs	O
,	O
which	O
ISO	B-General_Concept
images	I-General_Concept
cannot	O
.	O
</s>
<s>
Nero	B-Application
's	I-Application
NRG	B-General_Concept
format	O
is	O
one	O
of	O
the	O
few	O
formats	O
besides	O
BIN/CUE	O
,	O
Alcohol	O
120%'s	O
MDF/MDS	B-General_Concept
and	O
CloneCD	B-Application
's	O
CCD/IMG/SUB	O
disc	B-Application
image	I-Application
formats	O
to	O
support	O
Mixed	O
Mode	O
CDs	O
which	O
contain	O
audio	O
CD	O
tracks	O
as	O
well	O
as	O
data	O
tracks	O
.	O
</s>
<s>
The	O
NRG	B-General_Concept
file	O
format	O
uses	O
a	O
variation	O
of	O
the	O
Interchange	B-Device
File	I-Device
Format	I-Device
(	O
IFF	B-Device
)	O
and	O
stores	O
data	O
in	O
a	O
chain	O
of	O
"	O
chunks	O
"	O
.	O
</s>
<s>
All	O
integer	O
values	O
are	O
stored	O
unsigned	B-Algorithm
in	O
big	O
endian	O
byte	O
order	O
.	O
</s>
<s>
Version	O
1	O
NRG	B-General_Concept
format	O
stores	O
values	O
as	O
32-bit	O
integers	O
.	O
</s>
<s>
Nero	B-Application
Burning	I-Application
ROM	I-Application
v5.5	O
introduced	O
a	O
new	O
NRG	B-General_Concept
file	O
format	O
,	O
version	O
2	O
,	O
with	O
support	O
for	O
64-bit	O
integers	O
.	O
</s>
<s>
The	O
NRG	B-General_Concept
format	O
does	O
not	O
store	O
its	O
data	O
as	O
a	O
header	O
at	O
the	O
beginning	O
of	O
a	O
file	O
.	O
</s>
<s>
Image	O
information	O
is	O
stored	O
as	O
a	O
serialized	O
chain	O
of	O
IFF	B-Device
chunks	O
.	O
</s>
<s>
To	O
get	O
the	O
offset	O
of	O
the	O
first	O
chunk	O
one	O
must	O
read	O
the	O
NRG	B-General_Concept
footer	O
from	O
the	O
last	O
8	O
or	O
12	O
bytes	O
of	O
the	O
file	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
version	O
2	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Found	O
in	O
TAO	O
images	O
in	O
version	O
2	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Found	O
in	O
DAO	O
images	O
in	O
version	O
of	O
NRG	B-General_Concept
file	O
format	O
only	O
if	O
Nero	O
was	O
asked	O
not	O
to	O
close	O
the	O
disc	O
.	O
</s>
<s>
Found	O
in	O
TAO	O
images	O
in	O
version	O
2	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Found	O
in	O
TAO	O
images	O
in	O
version	O
2	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
<s>
Available	O
in	O
all	O
versions	O
of	O
NRG	B-General_Concept
file	O
format	O
.	O
</s>
