<s>
In	O
some	O
operating	B-General_Concept
systems	I-General_Concept
,	O
vol	B-Device
is	O
a	O
command	B-Application
within	O
the	O
command-line	O
interpreters	O
(	O
shells	B-Operating_System
)	O
such	O
as	O
COMMAND.COM	B-Operating_System
and	O
cmd.exe	B-Device
.	O
</s>
<s>
It	O
is	O
used	O
to	O
display	O
the	O
volume	O
label	O
and	O
volume	B-Application
serial	I-Application
number	I-Application
of	O
a	O
logical	B-Application
drive	I-Application
,	O
such	O
as	O
a	O
hard	B-Application
disk	I-Application
partition	I-Application
or	O
a	O
floppy	B-Device
disk	I-Device
,	O
if	O
they	O
exist	O
.	O
</s>
<s>
The	O
command	B-Application
is	O
available	O
in	O
various	O
versions	O
of	O
DOS	B-Device
,	O
DR	B-Operating_System
FlexOS	I-Operating_System
,	O
IBM/Toshiba	O
4690	B-Language
OS	I-Language
,	O
IBM	B-Application
OS/2	I-Application
,	O
Microsoft	B-Application
Windows	I-Application
,	O
and	O
ReactOS	B-Application
.	O
</s>
<s>
On	O
MS-DOS	B-Application
,	O
the	O
command	B-Application
is	O
available	O
in	O
versions	O
2	O
and	O
later	O
.	O
</s>
<s>
Paragon	O
Technology	O
Systems	O
PTS-DOS	B-Operating_System
2000	I-Operating_System
Pro	I-Operating_System
also	O
includes	O
a	O
implementation	O
.	O
</s>
<s>
The	O
Windows	B-Application
dir	B-Device
command	B-Application
also	O
displays	O
the	O
volume	O
label	O
and	O
serial	O
number	O
(	O
if	O
it	O
has	O
one	O
)	O
as	O
part	O
of	O
the	O
directory	O
listing	O
.	O
</s>
<s>
The	O
command	B-Application
is	O
also	O
available	O
in	O
the	O
EFI	B-Architecture
shell	I-Architecture
.	O
</s>
<s>
vol	B-Device
 [ Drive: ] 	O
</s>
<s>
Drive	O
:	O
This	O
command-line	O
argument	O
specifies	O
the	O
drive	O
letter	O
of	O
the	O
disk	O
for	O
which	O
to	O
display	O
the	O
volume	O
label	O
and	O
serial	O
number	O
.	O
</s>
<s>
On	O
Windows	B-Application
,	O
the	O
volume	B-Application
serial	I-Application
number	I-Application
is	O
displayed	O
only	O
for	O
disks	O
formatted	O
with	O
MS-DOS	B-Application
version	O
4.0	O
or	O
later	O
.	O
</s>
<s>
OS/2	B-Application
allows	O
the	O
user	O
to	O
specify	O
more	O
than	O
one	O
drive	O
.	O
</s>
<s>
The	O
vol	B-Device
command	B-Application
displays	O
the	O
volume	O
labels	O
consecutively	O
.	O
</s>
<s>
In	O
the	O
example	O
above	O
,	O
if	O
drive	O
C	O
:	O
has	O
no	O
volume	O
label	O
,	O
"	O
has	O
no	O
label	O
"	O
is	O
shown	O
instead	O
of	O
"	O
is	O
Windows	B-Application
"	O
.	O
</s>
