<s>
A	O
self	B-Application
mounting	I-Application
image	I-Application
is	O
a	O
disk	B-Application
image	I-Application
format	O
,	O
commonly	O
found	O
on	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
platform	O
,	O
that	O
is	O
encapsulated	O
in	O
an	O
application	B-Application
that	O
mounts	O
it	O
as	O
a	O
file	B-Application
system	I-Application
.	O
</s>
<s>
When	O
downloaded	O
from	O
the	O
Internet	O
,	O
they	O
are	O
often	O
in	O
a	O
BIN	O
,	O
BinHex	O
or	O
StuffIt	B-Application
file	O
.	O
</s>
<s>
Despite	O
being	O
an	O
application	B-Application
,	O
they	O
often	O
have	O
a	O
file	O
extension	O
.	O
</s>
<s>
Disk	B-Operating_System
Copy	I-Operating_System
,	O
the	O
application	B-Application
commonly	O
used	O
to	O
handle	O
disk	B-Application
images	I-Application
in	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
was	O
an	O
optional	O
program	O
not	O
part	O
of	O
the	O
standard	O
installation	O
.	O
</s>
<s>
Self	B-Application
mounting	I-Application
images	I-Application
have	O
fallen	O
out	O
of	O
favor	O
with	O
the	O
arrival	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
All	O
copies	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
have	O
DiskImageMounter	O
,	O
the	O
utility	O
for	O
mounting	O
disk	B-Application
images	I-Application
.	O
</s>
