<s>
In	O
computing	O
,	O
label	O
is	O
a	O
command	B-Application
included	O
with	O
some	O
operating	B-General_Concept
systems	I-General_Concept
(	O
e.g.	O
,	O
DOS	B-Device
,	O
IBM	B-Application
OS/2	I-Application
,	O
Microsoft	B-Application
Windows	I-Application
and	O
ReactOS	B-Application
)	O
.	O
</s>
<s>
It	O
is	O
used	O
to	O
create	O
,	O
change	O
,	O
or	O
delete	O
a	O
volume	O
label	O
on	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
</s>
<s>
The	O
command	B-Application
was	O
originally	O
designed	O
to	O
label	O
floppy	B-Device
disks	I-Device
as	O
a	O
reminder	O
of	O
which	O
one	O
is	O
in	O
the	O
machine	O
.	O
</s>
<s>
It	O
is	O
available	O
in	O
MS-DOS	B-Application
versions	O
3.1	O
and	O
later	O
and	O
IBM	B-Operating_System
PC	I-Operating_System
DOS	I-Operating_System
releases	O
3	O
and	O
later	O
.	O
</s>
<s>
It	O
is	O
an	O
external	O
command	B-Application
.	O
</s>
<s>
MS-DOS	B-Application
4.0x	O
and	O
earlier	O
used	O
label.com	O
as	O
the	O
external	O
file	O
.	O
</s>
<s>
MS-DOS	B-Application
5.0	O
and	O
Windows	B-Application
use	O
label.exe	O
as	O
the	O
external	O
file	O
.	O
</s>
<s>
DR	B-Application
DOS	I-Application
6.0	O
includes	O
an	O
implementation	O
of	O
the	O
command	B-Application
.	O
</s>
<s>
The	O
FreeDOS	B-Application
version	O
was	O
developed	O
by	O
Joe	O
Cosentino	O
and	O
is	O
licensed	O
under	O
the	O
GPL	B-License
.	O
</s>
<s>
In	O
modern	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
,	O
changing	O
the	O
disk	O
label	O
requires	O
elevated	O
permissions	O
.	O
</s>
<s>
The	O
Windows	B-Application
dir	B-Device
command	B-Application
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>
In	O
Unix	B-Application
and	O
other	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
the	O
name	O
of	O
the	O
equivalent	O
command	B-Application
differs	O
from	O
file	B-Application
system	I-Application
to	O
file	B-Application
system	I-Application
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
command	B-Application
e2label	O
can	O
be	O
used	O
for	O
ext2	B-Application
partitions	B-Application
.	O
</s>
<s>
drive	O
:	O
This	O
command-line	O
argument	O
specifies	O
the	O
drive	O
letter	O
of	O
a	O
drive	O
.	O
</s>
<s>
FAT	B-Application
volumes	I-Application
have	O
the	O
following	O
limitations	O
:	O
</s>
<s>
NTFS	B-Application
volume	O
labels	O
can	O
contain	O
as	O
many	O
as	O
32	O
Unicode	O
characters	O
.	O
</s>
