<s>
git-annex	B-Protocol
is	O
a	O
distributed	O
file	B-Application
synchronization	I-Application
system	O
written	O
in	O
Haskell	B-Language
.	O
</s>
<s>
The	O
development	O
of	O
git-annex	B-Protocol
began	O
in	O
2010	O
.	O
</s>
<s>
The	O
main	O
development	O
of	O
this	O
campaign	O
was	O
the	O
git-annex	B-Protocol
assistant	O
,	O
a	O
component	O
that	O
runs	O
in	O
the	O
background	O
to	O
automate	O
the	O
synchronization	O
of	O
repositories	O
.	O
</s>
<s>
git-annex	B-Protocol
uses	O
Git	B-Application
to	O
index	O
files	O
but	O
does	O
not	O
store	O
them	O
in	O
the	O
Git	B-Application
history	O
.	O
</s>
<s>
Instead	O
,	O
a	O
symbolic	B-Application
link	I-Application
representing	O
and	O
linking	O
to	O
the	O
probably	O
large	O
file	O
is	O
committed	O
.	O
</s>
<s>
git-annex	B-Protocol
manages	O
a	O
content-addressable	B-Data_Structure
storage	I-Data_Structure
for	O
the	O
files	O
under	O
its	O
control	O
.	O
</s>
<s>
A	O
separate	O
Git	B-Application
branch	O
logs	O
the	O
location	O
of	O
every	O
file	O
.	O
</s>
<s>
Thus	O
users	O
can	O
clone	O
a	O
git-annex	B-Protocol
repository	O
and	O
then	O
decide	O
for	O
every	O
file	O
whether	O
to	O
make	O
it	O
locally	O
available	O
.	O
</s>
<s>
git-annex	B-Protocol
packages	O
are	O
available	O
for	O
a	O
variety	O
of	O
operating	O
systems	O
,	O
including	O
:	O
</s>
