<s>
Binary	B-Application
delta	I-Application
compression	I-Application
is	O
a	O
technology	O
used	O
in	O
software	B-Application
deployment	I-Application
for	O
distributing	O
patches	O
.	O
</s>
<s>
Binary	B-Application
Delta	I-Application
Compression	I-Application
technology	O
allows	O
a	O
major	O
reduction	O
of	O
download	O
size	O
by	O
only	O
transferring	O
the	O
difference	O
between	O
the	O
old	O
and	O
the	O
new	O
files	O
during	O
the	O
update	O
process	O
.	O
</s>
<s>
In	O
real-world	O
implementations	O
,	O
it	O
is	O
common	O
to	O
also	O
use	O
standard	O
compression	O
techniques	O
(	O
such	O
as	O
Lempel-Ziv	B-Algorithm
)	O
while	O
compressing	O
.	O
</s>
<s>
This	O
makes	O
sense	O
because	O
LZW	B-Algorithm
already	O
works	O
by	O
referring	O
back	O
to	O
re-used	O
strings	O
.	O
</s>
<s>
is	O
a	O
good	O
example	O
of	O
this	O
,	O
as	O
it	O
is	O
built	O
from	O
ZLib	B-Language
.	O
</s>
<s>
The	O
benefits	O
of	O
this	O
are	O
that	O
even	O
if	O
there	O
are	O
few	O
similarities	O
between	O
the	O
original	O
and	O
the	O
new	O
file	O
,	O
a	O
good	O
data	B-General_Concept
compression	I-General_Concept
ratio	I-General_Concept
is	O
attained	O
.	O
</s>
