<s>
The	O
dump	B-Application
command	B-Application
is	O
a	O
program	B-Application
on	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
used	O
to	O
back	B-Protocol
up	I-Protocol
file	B-Application
systems	I-Application
.	O
</s>
<s>
It	O
operates	O
on	O
blocks	B-General_Concept
,	O
below	O
filesystem	B-Application
abstractions	O
such	O
as	O
files	B-Operating_System
and	O
directories	B-Application
.	O
</s>
<s>
Dump	B-Application
can	O
back	B-Protocol
up	I-Protocol
a	O
file	B-Application
system	I-Application
to	O
a	O
tape	B-Architecture
or	O
another	O
disk	O
.	O
</s>
<s>
It	O
is	O
often	O
used	O
across	O
a	O
network	O
by	O
piping	B-Operating_System
its	O
output	O
through	O
bzip2	B-Application
then	O
SSH	B-Protocol
.	O
</s>
<s>
A	O
dump	B-Application
utility	O
first	O
appeared	O
in	O
Version	O
6	O
AT&T	B-Operating_System
UNIX	I-Operating_System
.	O
</s>
<s>
A	O
dump	B-Application
command	B-Application
is	O
also	O
part	O
of	O
ASCII	O
's	O
MSX-DOS2	O
Tools	O
for	O
MSX-DOS	B-Operating_System
version	O
2	O
.	O
</s>
