<s>
VCDIFF	B-Application
is	O
a	O
format	O
and	O
an	O
algorithm	O
for	O
delta	B-Algorithm
encoding	I-Algorithm
,	O
described	O
in	O
IETF	O
's	O
.	O
</s>
<s>
VCDIFF	B-Application
is	O
used	O
as	O
one	O
of	O
the	O
delta	B-Algorithm
encoding	I-Algorithm
algorithms	O
in	O
"	O
Delta	B-Algorithm
encoding	I-Algorithm
in	O
HTTP	O
"	O
(	O
)	O
and	O
was	O
employed	O
in	O
Google	B-Application
's	I-Application
Shared	B-Algorithm
Dictionary	I-Algorithm
Compression	I-Algorithm
Over	I-Algorithm
HTTP	I-Algorithm
technology	O
,	O
formerly	O
used	O
in	O
their	O
Chrome	B-Application
browser	I-Application
.	O
</s>
<s>
VCDIFF	B-Application
has	O
3	O
delta	O
instructions	O
.	O
</s>
<s>
Free	B-Application
software	I-Application
implementations	O
include	O
xdelta	B-Application
(	O
version	O
3	O
)	O
and	O
open-vcdiff	O
.	O
</s>
<s>
Google	B-Application
's	I-Application
Shared	B-Algorithm
Dictionary	I-Algorithm
Compression	I-Algorithm
Over	I-Algorithm
HTTP	I-Algorithm
proposal	O
uses	O
this	O
algorithm	O
,	O
and	O
was	O
included	O
in	O
the	B-Application
Google	I-Application
Chrome	B-Application
browser	I-Application
,	O
up	O
to	O
version	O
58	O
.	O
</s>
<s>
-	O
Updates	O
CyanogenMod	B-Application
ROMs	O
using	O
Xdelta3	O
patches	O
.	O
</s>
